feat(data): 扩展示例波形数据与测试覆盖

新增示例谐波对比数据，完善图例、多轴和演示测试，并同步文档说明。
feat(annotation): 优化标注编辑与交互体验
2026-08-17 14:34:15 +08:00 · 2026-08-17 12:16:12 +08:00 · 2026-08-17 10:14:44 +08:00 · 2026-08-13 22:03:57 +08:00 · 2026-08-13 21:56:58 +08:00 · 2026-08-13 21:51:49 +08:00
50 changed files with 1375 additions and 462 deletions
--- a/.gitea/workflows/package.yml
+++ b/.gitea/workflows/package.yml
@@ -15,12 +15,13 @@ jobs:
        run: |
          set -euo pipefail
          server_url="${{ gitea.server_url }}"
-          repository_url="${server_url%/}/${{ gitea.repository }}.git"
          tag_name="${{ gitea.ref_name }}"
-          git init .
-          git remote add origin "$repository_url"
-          git fetch --depth 1 origin "refs/tags/$tag_name:refs/tags/$tag_name"
-          git checkout --detach "$tag_name^{commit}"
+          archive_url="${server_url%/}/api/v1/repos/${{ gitea.repository }}/archive/$tag_name.tar.gz"
+          curl --fail --show-error --silent --location "$archive_url" --output source.tar.gz
+          mkdir source
+          tar -xzf source.tar.gz --strip-components=1 -C source
+          cp -a source/. .
+          rm -rf source source.tar.gz

      - name: Set up pnpm
        run: |
@@ -214,7 +215,7 @@ jobs:
          : "${RELEASE_TOKEN:?RELEASE_TOKEN is required}"
          server_url="${{ gitea.server_url }}"
          api_url="$server_url/api/v1/repos/${{ gitea.repository }}/releases"
-          target_commitish="$(git rev-parse HEAD)"
+          target_commitish="$TAG_NAME"

          node - "$TAG_NAME" "$PACKAGE_VERSION" "$target_commitish" "$IS_PRERELEASE" > release.json <<'NODE'
          const [tagName, packageVersion, targetCommitish, prerelease] = process.argv.slice(2)
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,57 +1,130 @@
 # Repository Guidelines

-## Project Structure & Module Organization
+## Project Overview

-This repository is a Vue 3 + TypeScript waveform component library with a Vite demo.
-Production exports are defined in `src/index.ts`; demo entry points are `src/main.ts` and
-`src/App.vue`. The main chart is `src/components/WaveformChart.vue`, with focused modules under
-`src/components/{core,data,rendering,interaction,annotation}`. Shared types live in `src/types`,
-data normalization and chart logic in `src/core` and `src/utils`, styles in `src/styles.css`, and
-sample data in `src/data`. Tests are colocated with implementation files (`*.test.ts`), with shared
-setup in `src/test/setup.ts`. `dist/` and `dist-demo/` are generated; do not edit them.
+This repository is a Vue 3, TypeScript, and D3 waveform component library with a Vite demo.
+The published package is `waveform-analysis`; its supported public surface is exported from
+`src/index.ts`. The demo is a consumer of that library code, not part of the public API.

-## Build, Test, and Development Commands
+Important behavioral contracts:

-Use pnpm (the lockfile is `pnpm-lock.yaml`) and Node.js 22 as CI does.
+- Treat waveform input as immutable. Replace the `data` reference to refresh normalization,
+  domains, caches, and the viewport; do not rely on in-place array mutation.
+- X coordinates are stored in seconds. `timeUnit` and X-axis formatters affect display only and
+  must not alter raw coordinates, zoom domains, or emitted event values.
+- Give every multi-series waveform a unique, stable `id`. Visibility, annotations, axes, and
+  state retention use normalized series IDs.
+- Annotations and hidden-series state are controlled by the consumer. Emit replacement arrays;
+  persistence belongs to the host application.
+- Rendering may downsample visible SVG geometry, but domains, nearest-point lookup, tooltips,
+  annotations, and error ranges must continue to use the full normalized data.
+
+## Repository Layout
+
+- `src/index.ts`: deliberate package exports for components, types, core helpers, and utilities.
+- `src/components/WaveformChart.vue`: top-level chart composition and public prop/event boundary.
+- `src/components/core/`: layout, domains, grids, presentation state, and chart controllers.
+- `src/components/data/`: component-facing data types and data-layer exports.
+- `src/components/rendering/`: SVG tracks, axes, series, legends, hover layers, and styles.
+- `src/components/interaction/`: viewport, zoom, hover, tooltip, and interaction hosts.
+- `src/components/annotation/`: annotation types, serialization, editing, layout, and interaction.
+- `src/core/`: package-level normalization and rendering/downsampling logic.
+- `src/types/`: shared public data and chart types.
+- `src/utils/`: domains, formatting, geometry, sampling, and waveform ID helpers.
+- `src/demo/`, `src/App.vue`: controls and the main interactive demo workspace.
+- `src/router.ts`, `src/DemoRouterApp.vue`, `src/views/`: hash-based demo routes and focused demos.
+- `src/data/`: simulated demo data; `src/test/`: shared Vitest setup and test helpers.
+- `scripts/`: repository checks and declaration-build cleanup scripts.
+- `docs/` and root Markdown notes: supporting or historical documentation; verify claims against
+  current source, tests, `README.md`, and `package.json` before relying on them.
+
+Tests are colocated as `*.test.ts`. The large chart suite is split under
+`src/components/waveformChartCases/`; add focused cases there instead of rebuilding a monolithic
+chart test file.
+
+## Toolchain and Commands
+
+Use Node.js 22 and pnpm 10.32.1, matching CI. Keep `pnpm-lock.yaml` synchronized with
+`package.json` and use the locked install in automation.

 ```bash
-pnpm install                 # Install locked dependencies
-pnpm dev                     # Start the Vite demo server
-pnpm typecheck               # Run vue-tsc checks
-pnpm lint                    # Run ESLint with zero warnings allowed
-pnpm test                    # Run Vitest once
-pnpm test:coverage           # Run tests and enforce coverage thresholds
-pnpm build                   # Type-check and build library plus demo bundles
-pnpm preview                 # Preview the production demo build
+pnpm install --frozen-lockfile # Reproduce the CI dependency graph
+pnpm dev                       # Start the Vite demo
+pnpm typecheck                 # Run vue-tsc project checks
+pnpm check:file-length         # Enforce the 400-line limit under src/
+pnpm lint                      # Run ESLint with zero warnings allowed
+pnpm test                      # Run Vitest once
+pnpm test:coverage             # Run tests and enforce coverage thresholds
+pnpm build                     # Type-check and build library, declarations, and demo
+pnpm pack --dry-run            # Inspect the publishable package contents
+pnpm preview                   # Preview dist-demo/
+pnpm format                    # Apply the repository Prettier configuration
 ```

-Run `pnpm format` to apply the repository Prettier configuration.
+For a narrow change, run the closest test file while iterating, then run the full relevant gates
+before handoff. Do not describe a check as passing unless it actually ran.

-## Coding Style & Naming Conventions
+## Coding and Architecture Conventions

-Use TypeScript and Vue 3 Composition API with two-space indentation, single quotes, no semicolons,
-and a 100-column print width. Prettier and ESLint are authoritative.
-Use PascalCase for Vue components, component filenames, and types; use camelCase for functions,
-variables, and composables (for example, `useWaveformData`). Keep public exports deliberate and
-preserve stable series IDs for multi-channel data.
+Use Vue 3 Composition API and strict TypeScript. Follow the repository Prettier configuration:
+two-space indentation, single quotes, no semicolons, and a 100-column print width. Use PascalCase
+for Vue components and types, and camelCase for functions, composables, variables, and props in
+TypeScript. Vue template props and events use kebab-case.

-## Testing Guidelines
+ESLint enforces a maximum of 400 physical lines for files under `src/`; the standalone length
+check applies the same limit to all text files below `src/`. Split code by existing ownership
+boundaries when a file approaches the limit. Keep rendering, layout, interaction, annotation, and
+data concerns in their existing modules rather than adding more orchestration to
+`WaveformChart.vue`.

-Vitest with `@vue/test-utils` and jsdom is used. Name tests `*.test.ts` beside the
-code they cover. Exercise normalization, rendering/layout helpers, formatting, and component
-interactions, including empty, non-finite, and multi-series inputs. Coverage thresholds are 80%
-for lines/statements/functions and 75% for branches; run `pnpm test:coverage` before submitting.
+Use the `@/` alias for internal `src/` imports where it improves clarity. Keep public exports
+explicit: adding a type or helper internally does not make it supported API. When changing a
+public prop, event, type, formatter, serialization format, or package export, update `src/index.ts`,
+tests, and `README.md` together. Preserve backwards compatibility unless the task explicitly calls
+for a breaking change.

-## Commit & Pull Request Guidelines
+Do not hand-edit generated output in `dist/`, `dist-demo/`, `coverage/`, or `.vite/`. Library peers
+are externalized by `vite.lib.config.ts`; validate packaging after dependency or export changes.

-The current history contains only `first commit`, so no established convention exists yet. Use short,
-imperative messages, preferably scoped (for example, `feat(chart): ...`, `fix(annotation): ...`, or
-`test: ...`). Pull requests should explain API or user-visible changes, list verification commands,
-link an issue or plan, and include screenshots or a short recording for visual changes. Keep generated
-files and unrelated refactors out of the change.
+## Testing Expectations

-## CI and Configuration
+Vitest runs in jsdom with `@vue/test-utils`; shared setup is in `src/test/setup.ts`. Coverage uses
+V8 and must remain at least 80% for lines, statements, and functions, and 75% for branches.

-GitHub Actions runs install, typecheck, lint, coverage, build, and `pnpm pack --dry-run` on pushes and
-pull requests. Do not commit secrets or local environment files; review the staged file list before
-opening a pull request.
+Cover behavior at the narrowest useful layer:
+
+- normalization: empty, invalid, non-finite, unsorted, duplicate-ID, and multi-series inputs;
+- layout and domains: display modes, overlays, fixed ranges, pagination, margins, and small sizes;
+- formatting: endpoint/tick consistency, time units, scientific notation, and custom formatters;
+- rendering: downsampling, styles, points, error bars, axes, grids, legends, and clean view;
+- interaction: wheel/box zoom, zoom-out, pan, reset, hover, visibility, and presentation mode;
+- annotations: CRUD, serialization validation, drag offsets, reprojection, and hidden series.
+
+Avoid brittle assertions against incidental SVG structure when a user-visible or emitted behavior
+can be asserted instead. Add regression coverage for every bug fix.
+
+## Build, CI, and Release
+
+`pnpm build` produces the ESM/CJS library and CSS in `dist/`, declarations in `dist/types/`, and the
+demo in `dist-demo/`. GitHub CI runs frozen install, typecheck, file-length checks, lint, coverage,
+build, and `pnpm pack --dry-run` on pushes and pull requests.
+
+Use short Conventional Commit-style messages consistent with current history, for example
+`feat(chart): support ...`, `fix(annotation): handle ...`, or `test: cover ...`. Keep generated
+files, local settings, and unrelated refactors out of commits. Review `git status` and the staged
+diff before committing. Pull requests should explain public or user-visible effects, list commands
+actually run, link the relevant issue or plan, and include screenshots or a short recording for
+visual changes.
+
+Releases are triggered by annotated tags matching `vX.Y.Z` or a semver prerelease such as
+`vX.Y.Z-rc.1`. The tag version must exactly match `package.json`. The Gitea workflow validates,
+tests, builds, packs, publishes to both configured npm registries, creates checksums and a release,
+and deploys the demo only for stable versions. Do not create or push a release tag until the version
+commit and full release checks are complete.
+
+## Change Discipline
+
+Keep edits scoped to the request and preserve unrelated worktree changes. Do not commit secrets,
+local environment files, IDE state, logs, or registry credentials. For visual behavior changes,
+verify both the reusable component and the relevant demo route at representative desktop and small
+container sizes; state clearly when browser verification was not performed.
--- a/README.md
+++ b/README.md
@@ -96,40 +96,41 @@ const data = ref<WaveformData>({

 ### Props

-| Prop                              | 类型                                        | 默认值                                                  | 说明                               |
-| --------------------------------- | ------------------------------------------- | ------------------------------------------------------- | ---------------------------------- |
-| `data`                            | `WaveformData`                              | 必填                                                    | 波形数据                           |
-| `displayMode`                     | `'independent' \| 'separated' \| 'compact'` | `'independent'`                                         | 图框布局                           |
-| `overlayMode`                     | `'single-axis' \| 'multi-axis'`             | `'single-axis'`                                         | 叠加曲线的 Y 轴模式                |
-| `timeUnit`                        | `'s' \| 'ms'`                               | `'ms'`                                                  | 坐标轴和 tooltip 展示单位          |
-| `xLabel` / `yLabel`               | `string`                                    | `时间（timeUnit）` / `'幅值'`                           | 坐标轴名称                         |
-| `lineColor`                       | `string`                                    | `'#0960bd'`                                             | 单波形默认颜色                     |
-| `width` / `height`                | `number`                                    | 自适应                                                  | 组件总尺寸，单位为 CSS 像素        |
-| `zoomable` / `showTooltip`        | `boolean`                                   | `true` / `true`                                         | 缩放和数值 tooltip 开关            |
-| `pannable`                        | `boolean`                                   | `false`                                                 | 空格拖拽平移开关                   |
-| `minZoomSpan`                     | `number`                                    | 未设置                                                  | 最小缩放跨度，使用原始 X 数据单位  |
-| `minVisiblePoints`                | `number`                                    | `0`                                                     | 缩放后至少保留的不同 X 坐标数      |
-| `initialXDomain`                  | `[number, number]`                          | 未设置                                                  | 所有图框的初始 X 范围              |
-| `initialXDomains`                 | `Record<string, [number, number]>`          | 未设置                                                  | 按 track/series ID 配置初始范围    |
-| `yDomain`                         | `[number, number]`                          | 未设置                                                  | 所有波形的固定 Y 轴范围            |
-| `yDomains`                        | `Record<string, [number, number]>`          | 未设置                                                  | 按 track/series ID 配置固定范围    |
-| `grid`                            | `WaveformGridOptions`                       | `{ rowCount: 2, columnCount: 1, showPagination: true }` | 网格和分页                         |
-| `axes`                            | `WaveformAxesOptions`                       | 轴线均显示                                              | X/Y 轴基线显隐与 X 轴 label 格式化 |
-| `rendering`                       | `WaveformRenderingOptions`                  | `{}`                                                    | 降采样与点/误差棒间距              |
-| `title` / `legend` / `frameStyle` | 对应公开类型                                | 未设置                                                  | 标题、图例和图框样式               |
-| `frameNumber`                     | `string \| number`                          | 未设置                                                  | 图框水印内容                       |
-| `zeroLine`                        | `WaveformZeroLineOptions`                   | `{ visible: false }`                                    | 零值参考线显隐与样式               |
-| `cleanView`                       | `boolean`                                   | `false`                                                 | 保留波形、图框和刻度的净图模式     |
-| `presentationMode`                | `boolean`                                   | `false`                                                 | 禁用绘图区交互的展示模式           |
-| `annotations`                     | `WaveformAnnotation[]`                      | `[]`                                                    | 受控标注数据                       |
-| `annotationsVisible`              | `boolean`                                   | `true`                                                  | 标注图层显隐                       |
-| `interactionMode`                 | `'zoom' \| 'annotation'`                    | `'zoom'`                                                | 左键交互模式                       |
-| `hiddenSeriesIds`                 | `string[]`                                  | 未设置                                                  | 受控隐藏系列 ID                    |
-| `defaultHiddenSeriesIds`          | `string[]`                                  | `[]`                                                    | 非受控模式的初始隐藏系列           |
+| Prop                              | 类型                                        | 默认值                                                  | 说明                                          |
+| --------------------------------- | ------------------------------------------- | ------------------------------------------------------- | --------------------------------------------- |
+| `data`                            | `WaveformData`                              | 必填                                                    | 波形数据                                      |
+| `displayMode`                     | `'independent' \| 'separated' \| 'compact'` | `'independent'`                                         | 图框布局                                      |
+| `overlayMode`                     | `'single-axis' \| 'multi-axis'`             | `'single-axis'`                                         | 叠加曲线的 Y 轴模式                           |
+| `timeUnit`                        | `'s' \| 'ms'`                               | `'ms'`                                                  | 坐标轴和 tooltip 展示单位                     |
+| `xLabel` / `yLabel`               | `string`                                    | `时间（timeUnit）` / `'幅值'`                           | 坐标轴名称                                    |
+| `lineColor`                       | `string`                                    | `'#0960bd'`                                             | 单波形默认颜色                                |
+| `width` / `height`                | `number`                                    | 自适应                                                  | 组件总尺寸，单位为 CSS 像素                   |
+| `zoomable` / `showTooltip`        | `boolean`                                   | `true` / `true`                                         | 缩放和数值 tooltip 开关                       |
+| `pannable`                        | `boolean`                                   | `false`                                                 | 空格拖拽平移开关                              |
+| `minZoomSpan`                     | `number`                                    | 未设置                                                  | 最小缩放跨度，使用原始 X 数据单位             |
+| `minVisiblePoints`                | `number`                                    | `0`                                                     | 缩放后至少保留的不同 X 坐标数                 |
+| `initialXDomain`                  | `[number, number]`                          | 未设置                                                  | 所有图框的初始 X 范围（可超出数据，空白显示） |
+| `initialXDomains`                 | `Record<string, [number, number]>`          | 未设置                                                  | 按 track/series ID 配置初始范围（可超出数据） |
+| `xDomainStrategy`                 | `WaveformXDomainStrategy`                   | `{ type: 'data' }`                                      | 自动 X 轴视口范围策略                         |
+| `yDomain`                         | `[number, number]`                          | 未设置                                                  | 所有波形的固定 Y 轴范围                       |
+| `yDomains`                        | `Record<string, [number, number]>`          | 未设置                                                  | 按 track/series ID 配置固定范围               |
+| `grid`                            | `WaveformGridOptions`                       | `{ rowCount: 2, columnCount: 1, showPagination: true }` | 网格和分页                                    |
+| `axes`                            | `WaveformAxesOptions`                       | 轴线均显示                                              | X/Y 轴基线显隐与 X 轴 label 格式化            |
+| `rendering`                       | `WaveformRenderingOptions`                  | `{}`                                                    | 降采样与点/误差棒间距                         |
+| `title` / `legend` / `frameStyle` | 对应公开类型                                | 未设置                                                  | 标题、图例和图框样式                          |
+| `frameNumber`                     | `string \| number`                          | 未设置                                                  | 图框水印内容                                  |
+| `zeroLine`                        | `WaveformZeroLineOptions`                   | `{ visible: false }`                                    | 零值参考线显隐与样式                          |
+| `cleanView`                       | `boolean`                                   | `false`                                                 | 保留波形、图框和刻度的净图模式                |
+| `presentationMode`                | `boolean`                                   | `false`                                                 | 禁用绘图区交互的展示模式                      |
+| `annotations`                     | `WaveformAnnotation[]`                      | `[]`                                                    | 受控标注数据                                  |
+| `annotationsVisible`              | `boolean`                                   | `true`                                                  | 标注图层显隐                                  |
+| `interactionMode`                 | `'zoom' \| 'annotation'`                    | `'zoom'`                                                | 左键交互模式                                  |
+| `hiddenSeriesIds`                 | `string[]`                                  | 未设置                                                  | 受控隐藏系列 ID                               |
+| `defaultHiddenSeriesIds`          | `string[]`                                  | `[]`                                                    | 非受控模式的初始隐藏系列                      |

 所有公开类型均可从包入口导入，例如 `WaveformData`、`WaveformSeries`、
 `WaveformAnnotation`、`WaveformLineStyle`、`WaveformRenderingOptions`、
-`WaveformAxesOptions`、`WaveformXAxisLabelFormatter`、`WaveformZeroLineOptions`、
+`WaveformAxesOptions`、`WaveformXAxisLabelFormatter`、`WaveformXDomainStrategy`、`WaveformZeroLineOptions`、
 `WaveformGridOptions` 和 `WaveformGridTrackLines`。

 ### 数据结构
@@ -162,8 +163,8 @@ const points: WaveformData = {
 const chartData: WaveformData = {
  kind: 'series',
  series: [
-    { id: 'ch-a', name: '通道 A', trackId: 'group-1', data: samples },
-    { id: 'ch-b', name: '通道 B', trackId: 'group-1', data: points },
+    { id: 'ch-a', shotNo: '13300', name: '通道 A', trackId: 'group-1', data: samples },
+    { id: 'ch-b', shotNo: '13300', name: '通道 B', trackId: 'group-1', data: points },
  ],
 }
 ```
@@ -246,18 +247,43 @@ X 轴且包含多个轨道时使用按稳定 track ID 索引的 `yRanges`。平
 调用方应处理加载失败的情况（网络错误、超时等），并保持旧数据或显示加载状态。生产环境建议使用
 `AbortController` 取消过时的请求。

-`initialXDomain` 固定首次完整数据的 X 轴缩放边界，不要将它改成后端返回的当前窗口；独立图框有不同时间范围时，可通过
+`initialXDomain` 固定首次及重置时的 X 轴视口范围，不要将它改成后端返回的当前窗口；范围可以超出数据的实际时间，超出部分保留空白。独立图框有不同时间范围时，可通过
 `initialXDomains` 按 track ID 或 series ID 分别配置。`minZoomSpan` 使用原始 X 数据单位，
 可防止每次区间数据回填后重新累计放大。双击图框会
 重置组件内部缩放并触发 `zoom-reset`；调用方应在事件中取消区间请求并恢复首次完整数据。
 外部重置按钮也可以通过模板引用调用组件公开的 `resetViewport()` 方法，然后执行相同的数据恢复逻辑。

+没有显式配置初始范围时，可以通过 `xDomainStrategy` 将数据范围扩展为便于阅读的视口端点。
+默认的 `{ type: 'data' }` 保持数据最小值和最大值不变；`type: 'nice'` 使用固定刻度数量计算
+易读边界，且只扩展视口，不修改原始点位、tooltip、标注或缩放事件值：
+
+```vue
+<WaveformChart
+  :data="chartData"
+  :x-domain-strategy="{ type: 'nice', bounds: 'end', tickCount: 10, includeExplicit: true }"
+/>
+```
+
+例如秒坐标数据范围为 `[0, 4.999999]` 且 `timeUnit='ms'` 时，上述配置会使用
+`[0, 5]` 作为初始及重置视口，两端 label 显示 `0` 和 `5000`。`bounds: 'end'`
+只扩展右端；默认的 `bounds: 'both'`
+会同时扩展两端。`tickCount` 默认为 `10`，只参与边界计算，不随组件宽度变化。
+`initialXDomains`、`initialXDomain` 的显式配置默认保持原值；仅当 `includeExplicit: true` 时
+也应用 nice 扩展。独立模式在未配置显式范围时
+按图框分别计算，共享 X 轴模式则合并所有可见图框后计算。所有范围仍使用原始秒坐标，
+`timeUnit` 只影响显示。
+
 独立坐标模式下，回填响应应只替换 `seriesIds` 对应的系列，并调用
-`resetViewport(trackIndex)`；其他图框的数据和缩放状态应保持不变。
+`resetViewport(trackIndex)`；其他图框的数据和缩放状态应保持不变。独立模式下双击图框触发的
+`zoom-reset` payload 会包含该图框的 `trackIndex` 和 `seriesIds`；共享 X 范围模式的 payload
+不包含这两个字段，表示全局复位。忽略事件参数的既有监听器可以继续使用。

 多通道数据应为每个 `WaveformSeries` 提供稳定的 `id`。内部时间坐标始终使用秒，
 `timeUnit` 只控制坐标轴和 tooltip 的显示单位。

+Tooltip 每个系列按 `炮号：通道  (x:值 y:值)` 格式显示。`WaveformSeries.shotNo` 为空或未提供时，
+炮号显示为“未配置炮号”；Tooltip 不显示单位和误差附加文本。
+
 ### 线型、点型与误差棒

 每条序列可以独立设置连线方式、数据点符号和误差棒：
@@ -265,6 +291,7 @@ X 轴且包含多个轨道时使用按稳定 track ID 索引的 `yRanges`。平
 ```ts
 const series = {
  id: 'temperature',
+  shotNo: '13300',
  name: '温度',
  lineType: 'step-end',
  lineStyle: 'dashed',
@@ -388,7 +415,8 @@ Demo 左侧控制面板提供标题实时预览，可配置标题名称、显隐

 ### 图例与曲线显隐

-`legend.backgroundColor` 设置多曲线图例的背景颜色。该字段接受任意有效 CSS 颜色值，
+每个图框独立管理自己的图例：图框内有两条或更多曲线时显示图例，只有一条曲线时不显示。
+`legend.backgroundColor` 设置图例的背景颜色。该字段接受任意有效 CSS 颜色值，
 可通过 `rgba(...)` 或 `hsla(...)` 中的 alpha 通道调整透明度：

 ```vue
@@ -639,7 +667,7 @@ X 轴刻度和左右端点先按 `timeUnit` 转换为秒或毫秒，再显示为
 | `point-hover`                                                   | 当前最近点变化时触发，离开图表时传入 `null`                    |
 | `zoom-change`                                                   | 缩放过程中触发，参数为 `[start, end]`                          |
 | `zoom-end`                                                      | 滚轮或框选结束后触发；`gesture` 区分二者，独立模式附带轨道信息 |
-| `zoom-reset`                                                    | 双击重置视口时触发，调用方应恢复首次完整数据                   |
+| `zoom-reset`                                                    | 双击重置视口时触发；独立模式 payload 标识目标图框              |
 | `page-change`                                                   | 分页变化，参数为当前页和总页数                                 |
 | `series-visibility-change`                                      | 图例切换曲线显隐时触发                                         |
 | `annotation-create` / `annotation-update` / `annotation-delete` | 标注新增、更新或删除                                           |
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "waveform-analysis",
-  "version": "0.1.31",
+  "version": "0.1.38",
  "main": "./dist/index.cjs",
  "module": "./dist/index.js",
  "types": "./dist/types/index.d.ts",
--- a/src/App.test.ts
+++ b/src/App.test.ts
@@ -235,7 +235,7 @@ describe('App workspace layout', { timeout: 20_000 }, () => {
      tracks.map((track) =>
        track.findAll('.waveform-chart__series').map((item) => item.attributes('data-series-name')),
      ),
-    ).toEqual([['正弦基波'], ['谐波扰动'], ['阻尼振荡'], ['阶跃响应']])
+    ).toEqual([['正弦基波'], ['谐波扰动', '谐波对比'], ['阻尼振荡'], ['阶跃响应']])
    expect(
      tracks
        .slice(1)
@@ -253,6 +253,7 @@ describe('App workspace layout', { timeout: 20_000 }, () => {
    expect(simulatedSeries.map((item) => item.name)).toEqual([
      '正弦基波',
      '谐波扰动',
+      '谐波对比',
      '阻尼振荡',
      '阶跃响应',
      '脉冲响应',
@@ -321,8 +322,8 @@ describe('App workspace layout', { timeout: 20_000 }, () => {
    const styleSelect = frameControls.findAllComponents(Select)[0]

    expect(colorPickers).toHaveLength(2)
-    expect(widthInput).toBeDefined()
-    expect(styleSelect).toBeDefined()
+    const initialFrames = wrapper.findAll('.waveform-chart__plot-frame')
+    expect(initialFrames.length > 1 && initialFrames.every((frame) => frame.attributes('stroke-width') === '2')).toBe(true)

    colorPickers[0].vm.$emit('update:pureColor', 'rgba(220, 38, 38, 0.8)')
    colorPickers[1].vm.$emit('update:pureColor', 'rgba(14, 165, 233, 0.25)')
--- a/src/App.vue
+++ b/src/App.vue
@@ -32,7 +32,7 @@ const overlayMode = ref<WaveformOverlayMode>('single-axis')
 const rowCount = ref(4)
 const columnCount = ref(1)
 const frameBorderColor = ref('#1f2937')
-const frameBorderWidth = ref(1)
+const frameBorderWidth = ref(2)
 const frameBorderStyle = ref<NonNullable<WaveformFrameStyle['borderStyle']>>('solid')
 const frameBackgroundColor = ref('rgba(255, 255, 255, 0)')
 const frameWatermarkVisible = ref(true)
--- a/src/components/WaveformChart.vue
+++ b/src/components/WaveformChart.vue
@@ -16,6 +16,7 @@ const props = withDefaults(defineProps<WaveformChartProps>(), {
  zoomable: true,
  pannable: false,
  minVisiblePoints: 0,
+  xDomainStrategy: () => ({ type: 'data' }),
  timeUnit: 'ms',
  frameNumber: undefined,
  annotations: () => [],
--- a/src/components/WaveformChartView.vue
+++ b/src/components/WaveformChartView.vue
@@ -87,9 +87,11 @@ const {
  contextMenu,
  editorSeries,
  editorSeriesOptions,
+  timeError,
  confirmAnnotation,
  cancelAnnotation,
  changeDraftSeries,
+  changeDraftTime,
  editContextAnnotation,
  deleteContextAnnotation,
  chartHeight,
@@ -98,6 +100,11 @@ const {
  setTitleMeasureElement,
  setSharedOverlayElement,
 } = toRefs(props.controller)
+
+function handleChartPointerLeave() {
+  pointerInsideChart.value = false
+  handlePointerLeave.value()
+}
 </script>

 <template>
@@ -123,7 +130,7 @@ const {
    :data-plot-margin-bottom="resolvedPlotMargin.bottom"
    :data-title-area-height="titleAreaHeight"
    @pointerenter="pointerInsideChart = true"
-    @pointerleave="pointerInsideChart = false"
+    @pointerleave="handleChartPointerLeave"
    @contextmenu.capture="handleNativeContextMenu"
  >
    <div
@@ -332,9 +339,11 @@ const {
      :series="editorSeries"
      :series-options="editorSeriesOptions"
      :time-unit="timeUnit"
+      :time-error="timeError"
      @confirm="confirmAnnotation"
      @cancel="cancelAnnotation"
      @series-change="changeDraftSeries"
+      @time-change="changeDraftTime"
    />

    <WaveformAnnotationContextMenu
--- a/src/components/annotation/WaveformAnnotationEditor.css
+++ b/src/components/annotation/WaveformAnnotationEditor.css
@@ -1,63 +1,8 @@
-.waveform-annotation-editor {
-  position: absolute;
-  inset: 0;
-  z-index: 40;
-  display: grid;
-  place-items: center;
-  padding: 20px;
-  background: rgb(16 24 40 / 32%);
-  animation: waveform-annotation-editor-fade-in 160ms ease-out;
-}
-.waveform-annotation-editor__panel {
+.waveform-annotation-editor__content {
  display: grid;
  gap: 20px;
-  width: min(440px, 100%);
-  max-height: 100%;
-  overflow-y: auto;
-  padding: 22px;
  color: #344054;
  font-size: 13px;
-  background: #fff;
-  border: 1px solid #e4e7ec;
-  border-radius: 12px;
-  box-shadow: 0 20px 50px rgb(16 24 40 / 22%);
-  animation: waveform-annotation-editor-rise-in 180ms ease-out;
-}
-.waveform-annotation-editor__header {
-  display: flex;
-  align-items: flex-start;
-  justify-content: space-between;
-  gap: 16px;
-}
-.waveform-annotation-editor__header h2 {
-  margin: 0;
-  color: #101828;
-  font-size: 18px;
-  line-height: 1.3;
-}
-.waveform-annotation-editor__header p {
-  margin: 5px 0 0;
-  color: #667085;
-  font-size: 12px;
-}
-.waveform-annotation-editor__close {
-  display: inline-grid;
-  flex: 0 0 30px;
-  width: 30px;
-  height: 30px;
-  padding: 0;
-  place-items: center;
-  color: #667085;
-  font-size: 22px;
-  line-height: 1;
-  background: transparent;
-  border: 0;
-  border-radius: 6px;
-  cursor: pointer;
-}
-.waveform-annotation-editor__close:hover {
-  color: #101828;
-  background: #f2f4f7;
 }
 .waveform-annotation-editor__coordinates {
  display: grid;
@@ -78,6 +23,39 @@
 .waveform-annotation-editor__coordinates span {
  color: #667085;
 }
+.waveform-annotation-editor__coordinate-input {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  gap: 8px;
+  padding: 9px 10px;
+  color: #667085;
+  background: #f8fafc;
+  border: 1px solid #eaecf0;
+  border-radius: 7px;
+}
+.waveform-annotation-editor__coordinate-input :deep(.ant-input-number) {
+  width: auto;
+  min-width: 96px;
+  color: #344054;
+  font-family: 'SFMono-Regular', Consolas, monospace;
+}
+.waveform-annotation-editor__coordinate-value {
+  display: none;
+}
+.waveform-annotation-editor__coordinate-error {
+  grid-column: 1 / -1;
+  margin: -12px 0 0;
+  color: #d92d20;
+  font-size: 11px;
+  line-height: 1.4;
+}
+.waveform-annotation-editor__coordinate-hint {
+  margin: -12px 0 0;
+  color: #98a2b3;
+  font-size: 11px;
+  line-height: 1.4;
+}
 .waveform-annotation-editor__coordinates b {
  color: #1677ff;
  font-size: 11px;
@@ -205,56 +183,9 @@
  border-color: #98a2b3;
  box-shadow: 0 0 0 3px rgb(22 119 255 / 12%);
 }
-.waveform-annotation-editor__actions {
-  display: flex;
-  justify-content: flex-end;
-  gap: 8px;
-  padding-top: 8px;
-  border-top: 1px solid #eaecf0;
-}
-.waveform-annotation-editor__actions button {
-  height: 34px;
-  padding: 0 12px;
-  color: #475467;
-  background: #fff;
-  border: 1px solid #d0d5dd;
-  border-radius: 6px;
-  cursor: pointer;
-}
-.waveform-annotation-editor__actions button.is-primary {
-  color: #fff;
-  background: #1677ff;
-  border-color: #1677ff;
-}
-.waveform-annotation-editor__actions button:disabled {
-  opacity: 0.45;
-  cursor: not-allowed;
-}
-@keyframes waveform-annotation-editor-fade-in {
-  from {
-    opacity: 0;
-  }
-  to {
-    opacity: 1;
-  }
-}
-@keyframes waveform-annotation-editor-rise-in {
-  from {
-    opacity: 0;
-    transform: translateY(8px) scale(0.98);
-  }
-  to {
-    opacity: 1;
-    transform: translateY(0) scale(1);
-  }
-}
@media (max-width: 420px) {
-  .waveform-annotation-editor {
-    padding: 12px;
-  }
-  .waveform-annotation-editor__panel {
+  .waveform-annotation-editor__content {
    gap: 16px;
-    padding: 18px;
  }
  .waveform-annotation-editor__coordinates {
    grid-template-columns: 1fr;
--- a/src/components/annotation/WaveformAnnotationEditor.vue
+++ b/src/components/annotation/WaveformAnnotationEditor.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import { computed, nextTick, ref, watch } from 'vue'
+import { InputNumber, Modal } from 'ant-design-vue'
 import { ColorPicker } from 'vue3-colorpicker'
 import 'vue3-colorpicker/style.css'

@@ -15,24 +16,44 @@ interface Props {
  series?: AnnotationSeriesInfo
  seriesOptions?: AnnotationSeriesCandidate[]
  timeUnit?: TimeUnit
+  timeError?: string
 }

 const props = withDefaults(defineProps<Props>(), {
  timeUnit: 'ms',
+  timeError: '',
 })
 const emit = defineEmits<{
  (event: 'confirm', annotation: WaveformAnnotation): void
  (event: 'cancel'): void
  (event: 'series-change', seriesId: string): void
+  (event: 'time-change', displayValue: string): void
 }>()

 const textarea = ref<HTMLTextAreaElement>()
 const dialogTitleId = useWaveformInstanceId('waveform-annotation-editor-title')
 const text = ref('')
+const timeInput = ref('')
+const timeValidationRequested = ref(false)
 const borderColor = ref('')
 const textColor = ref('')
 const backgroundColor = ref('')
-const canConfirm = computed(() => text.value.trim().length > 0)
+const inputTimeError = computed(() => {
+  if (!timeValidationRequested.value) return ''
+  if (!timeInput.value.trim() || !Number.isFinite(Number(timeInput.value)))
+    return '请输入有效的时间'
+  return ''
+})
+const timeErrorMessage = computed(() =>
+  timeValidationRequested.value ? inputTimeError.value || props.timeError || '' : '',
+)
+const canConfirm = computed(
+  () =>
+    text.value.trim().length > 0 &&
+    timeInput.value.trim().length > 0 &&
+    Number.isFinite(Number(timeInput.value)) &&
+    !timeErrorMessage.value,
+)
 const characterCount = computed(() => text.value.length)
 const selectedSeries = computed(() => {
  const option = props.seriesOptions?.find(
@@ -46,15 +67,30 @@ const selectedSeries = computed(() => {
 function hydrate() {
  const style = resolveAnnotationStyle(props.annotation.style)
  text.value = props.annotation.text
+  timeInput.value = formatAnnotationTime(props.annotation.x, props.timeUnit)
+  timeValidationRequested.value = false
  borderColor.value = style.borderColor
  textColor.value = style.textColor
  backgroundColor.value = style.backgroundColor
  void nextTick(() => textarea.value?.focus())
 }

-watch(() => props.annotation, hydrate, { immediate: true })
+watch(() => props.annotation.id, hydrate, { immediate: true })

-function confirm() {
+function handleTimeInput(value: number | string | null) {
+  const nextValue = value === null || value === undefined ? '' : String(value)
+  timeInput.value = nextValue
+  timeValidationRequested.value = false
+}
+
+function commitTimeInput() {
+  timeValidationRequested.value = true
+  emit('time-change', timeInput.value)
+}
+
+async function confirm() {
+  commitTimeInput()
+  await nextTick()
  if (!canConfirm.value) return
  emit('confirm', {
    ...props.annotation,
@@ -82,40 +118,60 @@ function handleSeriesChange(event: Event) {
 </script>

 <template>
-  <div
-    class="waveform-annotation-editor"
-    role="dialog"
-    aria-modal="true"
-    :aria-labelledby="dialogTitleId"
-    @click.self="emit('cancel')"
+  <Modal
+    :visible="true"
+    :width="440"
+    :mask-closable="true"
+    :keyboard="true"
+    cancel-text="取消"
+    ok-text="保存标注"
+    :ok-button-props="{ disabled: !canConfirm }"
+    wrap-class-name="waveform-annotation-editor"
+    @cancel="emit('cancel')"
+    @ok="confirm"
  >
-    <section class="waveform-annotation-editor__panel">
-      <header class="waveform-annotation-editor__header">
-        <div>
-          <h2 :id="dialogTitleId">
-            {{ props.mode === 'add' ? '添加标注' : '编辑标注' }}
-          </h2>
-        </div>
-        <button
-          type="button"
-          class="waveform-annotation-editor__close"
-          aria-label="关闭标注编辑器"
-          title="关闭"
-          @click="emit('cancel')"
-        >
-          ×
-        </button>
-      </header>
+    <template #title>
+      <span :id="dialogTitleId">{{ props.mode === 'add' ? '添加标注' : '编辑标注' }}</span>
+    </template>

+    <div class="waveform-annotation-editor__content">
      <div class="waveform-annotation-editor__coordinates" aria-label="标注坐标">
-        <span
-          ><b>X ({{ props.timeUnit }})</b
-          ><code>{{ formatAnnotationTime(props.annotation.x, props.timeUnit) }}</code></span
+        <label
+          class="waveform-annotation-editor__coordinate-input"
+          :aria-invalid="Boolean(timeErrorMessage)"
        >
+          <b>X</b>
+          <InputNumber
+            :value="timeInput === '' ? undefined : Number(timeInput)"
+            :controls="true"
+            :step="0.001"
+            :keyboard="true"
+            :status="timeErrorMessage ? 'error' : undefined"
+            aria-label="标注横轴时间"
+            :aria-invalid="Boolean(timeErrorMessage)"
+            :aria-describedby="timeErrorMessage ? `${dialogTitleId}-time-error` : undefined"
+            @blur="commitTimeInput"
+            @update:value="handleTimeInput"
+          />
+          <code class="waveform-annotation-editor__coordinate-value" aria-hidden="true">{{
+            timeInput
+          }}</code>
+        </label>
+        <p
+          v-if="timeErrorMessage"
+          :id="`${dialogTitleId}-time-error`"
+          class="waveform-annotation-editor__coordinate-error"
+          role="alert"
+        >
+          {{ timeErrorMessage }}
+        </p>
        <span
          ><b>Y</b><code>{{ formatPlainNumber(props.annotation.y) }}</code></span
        >
      </div>
+      <p class="waveform-annotation-editor__coordinate-hint" role="note">
+        修改 X 轴后失焦时会自动吸附最近的采样点
+      </p>

      <label
        v-if="selectedSeries"
@@ -200,14 +256,8 @@ function handleSeriesChange(event: Event) {
        </label>
      </fieldset>

-      <footer class="waveform-annotation-editor__actions">
-        <button type="button" @click="emit('cancel')">取消</button>
-        <button type="button" class="is-primary" :disabled="!canConfirm" @click="confirm">
-          保存标注
-        </button>
-      </footer>
-    </section>
-  </div>
+    </div>
+  </Modal>
 </template>

 <style scoped src="./WaveformAnnotationEditor.css"></style>
--- a/src/components/annotation/components.test.ts
+++ b/src/components/annotation/components.test.ts
@@ -1,28 +1,93 @@
 import { flushPromises, mount } from '@vue/test-utils'
-import { describe, expect, it, vi } from 'vitest'
+import { InputNumber } from 'ant-design-vue'
+import { afterEach, describe, expect, it, vi } from 'vitest'
 import { ColorPicker } from 'vue3-colorpicker'
+import { defineComponent, h } from 'vue'

 import WaveformAnnotationContextMenu from './WaveformAnnotationContextMenu.vue'
 import WaveformAnnotationEditor from './WaveformAnnotationEditor.vue'
 import WaveformAnnotationLayer from './WaveformAnnotationLayer.vue'

+const modalStub = defineComponent({
+  props: [
+    'visible',
+    'width',
+    'maskClosable',
+    'keyboard',
+    'wrapClassName',
+    'cancelText',
+    'okText',
+    'okButtonProps',
+  ],
+  emits: ['cancel', 'ok'],
+  setup(props, { emit, slots }) {
+    return () => {
+      const title = slots.title?.() ?? []
+      const titleId = (title[0]?.props as { id?: string } | undefined)?.id
+      return h('div', { class: 'ant-modal-root' }, [
+        h(
+          'div',
+          {
+            class: ['ant-modal-wrap', props.wrapClassName],
+            role: 'dialog',
+            'aria-modal': 'true',
+            'aria-labelledby': titleId,
+            onClick: (event: MouseEvent) => {
+              if (event.target === event.currentTarget && props.maskClosable) emit('cancel')
+            },
+          },
+          [
+            h('div', { class: 'ant-modal' }, [
+              h('div', { class: 'ant-modal-header' }, [
+                h('div', { class: 'ant-modal-title' }, title),
+              ]),
+              h('button', { class: 'ant-modal-close', onClick: () => emit('cancel') }, '×'),
+              slots.default?.(),
+              h('div', { class: 'ant-modal-footer' }, [
+                h('button', { class: 'ant-btn', onClick: () => emit('cancel') }, props.cancelText),
+                h(
+                  'button',
+                  {
+                    class: 'ant-btn ant-btn-primary',
+                    disabled: props.okButtonProps?.disabled,
+                    onClick: () => emit('ok'),
+                  },
+                  props.okText,
+                ),
+              ]),
+            ]),
+          ],
+        ),
+      ])
+    }
+  },
+})
+const mountEditor = (options: { props: Record<string, unknown> }) =>
+  mount(WaveformAnnotationEditor, {
+    props: options.props as never,
+    global: { stubs: { Modal: modalStub, AModal: modalStub } },
+  })
+
 describe('waveform annotation controls', () => {
+  afterEach(() => {
+    document.body.innerHTML = ''
+  })
  it('keeps dialog title ids unique across editor instances', () => {
-    const first = mount(WaveformAnnotationEditor, {
+    const first = mountEditor({
      props: {
        annotation: { id: 'first', seriesId: 'a', x: 1, y: 2, text: '说明' },
        mode: 'edit',
      },
    })
-    const second = mount(WaveformAnnotationEditor, {
+    const second = mountEditor({
      props: {
        annotation: { id: 'second', seriesId: 'a', x: 1, y: 2, text: '说明' },
        mode: 'edit',
      },
    })

-    const firstTitleId = first.get('h2').attributes('id')
-    const secondTitleId = second.get('h2').attributes('id')
+    const firstTitleId = first.get('.ant-modal-title [id]').attributes('id')
+    const secondTitleId = second.get('.ant-modal-title [id]').attributes('id')

    expect(firstTitleId).toBeTruthy()
    expect(secondTitleId).toBeTruthy()
@@ -31,8 +96,19 @@ describe('waveform annotation controls', () => {
    expect(second.get('[role="dialog"]').attributes('aria-labelledby')).toBe(secondTitleId)
  })

+  it.each(['add', 'edit'] as const)('shows the X-axis snapping hint in %s mode', (mode) => {
+    const wrapper = mountEditor({
+      props: {
+        annotation: { id: `hint-${mode}`, seriesId: 'a', x: 1, y: 2, text: '说明' },
+        mode,
+      },
+    })
+
+    expect(wrapper.get('[role="note"]').text()).toBe('修改 X 轴后失焦时会自动吸附最近的采样点')
+  })
+
  it('allows changing the annotation series inside the editor', async () => {
-    const wrapper = mount(WaveformAnnotationEditor, {
+    const wrapper = mountEditor({
      props: {
        annotation: { id: 'note', seriesId: 'a', x: 1, y: 2, text: '说明' },
        mode: 'edit',
@@ -77,17 +153,15 @@ describe('waveform annotation controls', () => {

  it('validates text and emits an immutable edited annotation with style defaults', async () => {
    const annotation = { id: 'note', seriesId: 'a', x: 1, y: 2, text: '' }
-    const wrapper = mount(WaveformAnnotationEditor, {
+    const wrapper = mountEditor({
      props: { annotation, mode: 'add' },
    })
    await flushPromises()

    expect(wrapper.get('textarea').attributes('maxlength')).toBe('40')
-    expect(wrapper.get('.waveform-annotation-editor__coordinates').text()).toContain(
-      'X (ms)1000.000',
-    )
+    expect(wrapper.get('.waveform-annotation-editor__coordinates').text()).toContain('X1000.000')
    expect(wrapper.get('.waveform-annotation-editor__coordinates').text()).toContain('Y2')
-    expect(wrapper.get('button.is-primary').attributes('disabled')).toBeDefined()
+    expect(wrapper.get('button.ant-btn-primary').attributes('disabled')).toBeDefined()
    await vi.waitFor(() => expect(wrapper.findAllComponents(ColorPicker)).toHaveLength(3), {
      timeout: 5000,
    })
@@ -113,7 +187,7 @@ describe('waveform annotation controls', () => {
    colorPickers[1].vm.$emit('update:pureColor', 'rgba(51, 51, 51, 0.8)')
    colorPickers[2].vm.$emit('update:pureColor', 'rgba(255, 255, 255, 0.5)')
    await wrapper.vm.$nextTick()
-    await wrapper.get('button.is-primary').trigger('click')
+    await wrapper.get('button.ant-btn-primary').trigger('click')

    const emitted = wrapper.emitted('confirm')?.[0]?.[0] as
      | {
@@ -133,7 +207,7 @@ describe('waveform annotation controls', () => {
  })

  it('formats annotation coordinates using the selected display context', () => {
-    const wrapper = mount(WaveformAnnotationEditor, {
+    const wrapper = mountEditor({
      props: {
        annotation: { id: 'note', seriesId: 'series', x: 1, y: 0.0000001, text: '说明' },
        mode: 'edit',
@@ -142,13 +216,53 @@ describe('waveform annotation controls', () => {
    })

    const coordinates = wrapper.get('.waveform-annotation-editor__coordinates').text()
-    expect(coordinates).toContain('X (s)1.000')
+    expect(coordinates).toContain('X1.000')
    expect(coordinates).toContain('Y0.0000001')
    expect(coordinates).not.toContain('e-')
  })

+  it('emits valid manual time input and disables save for invalid input', async () => {
+    const wrapper = mountEditor({
+      props: {
+        annotation: { id: 'note', seriesId: 'series', x: 1, y: 2, text: '说明' },
+        mode: 'edit',
+        timeUnit: 'ms',
+      },
+    })
+    const input = wrapper.getComponent(InputNumber)
+    expect(input.props('controls')).toBe(true)
+    await input.vm.$emit('update:value', 1500)
+    expect(wrapper.emitted('time-change')).toBeUndefined()
+    await input.vm.$emit('blur')
+    expect(wrapper.emitted('time-change')).toEqual([['1500']])
+    await input.vm.$emit('update:value', null)
+    await input.vm.$emit('blur')
+    expect(wrapper.get('[role="alert"]').text()).toBe('请输入有效的时间')
+    expect(wrapper.get('button.ant-btn-primary').attributes('disabled')).toBeDefined()
+  })
+
+  it('shows time validation errors and blocks confirmation', async () => {
+    const wrapper = mountEditor({
+      props: {
+        annotation: { id: 'note', seriesId: 'series', x: 1, y: 2, text: '说明' },
+        mode: 'edit',
+        timeError: '时间超出当前波形范围',
+      },
+    })
+
+    const input = wrapper.getComponent(InputNumber)
+    await input.vm.$emit('blur')
+    expect(
+      wrapper.get('.waveform-annotation-editor__coordinate-input').attributes('aria-invalid'),
+    ).toBe('true')
+    expect(wrapper.get('[role="alert"]').text()).toBe('时间超出当前波形范围')
+    expect(wrapper.get('button.ant-btn-primary').attributes('disabled')).toBeDefined()
+    await wrapper.setProps({ timeError: '' })
+    expect(wrapper.find('[role="alert"]').exists()).toBe(false)
+  })
+
  it('hydrates hexadecimal and rgba annotation colors', async () => {
-    const wrapper = mount(WaveformAnnotationEditor, {
+    const wrapper = mountEditor({
      props: {
        annotation: {
          id: 'colored-note',
@@ -176,7 +290,7 @@ describe('waveform annotation controls', () => {
  })

  it('supports modal dismissal and live character counting', async () => {
-    const editor = mount(WaveformAnnotationEditor, {
+    const editor = mountEditor({
      props: {
        annotation: { id: 'note', seriesId: 'a', x: 1, y: 2, text: '原文字' },
        mode: 'edit',
@@ -184,23 +298,23 @@ describe('waveform annotation controls', () => {
    })

    expect(editor.get('[role="dialog"]').attributes('aria-modal')).toBe('true')
-    expect(editor.get('h2').text()).toBe('编辑标注')
+    expect(editor.get('.ant-modal-title').text()).toBe('编辑标注')
    await editor.get('textarea').setValue('三字说明')
    expect(editor.get('.waveform-annotation-editor__label-row').text()).toContain('4/40')

    await editor.get('textarea').trigger('keydown', { key: 'Escape' })
-    await editor.get('.waveform-annotation-editor').trigger('click')
+    await editor.get('.ant-modal-wrap').trigger('click')
    expect(editor.emitted('cancel')).toHaveLength(2)
  })

  it('supports cancellation and context menu actions', async () => {
-    const editor = mount(WaveformAnnotationEditor, {
+    const editor = mountEditor({
      props: {
        annotation: { id: 'note', seriesId: 'a', x: 1, y: 2, text: '原文字' },
        mode: 'edit',
      },
    })
-    await editor.findAll('button')[0].trigger('click')
+    await editor.get('.ant-modal-close').trigger('click')
    expect(editor.emitted('cancel')).toHaveLength(1)

    const menu = mount(WaveformAnnotationContextMenu, {
--- a/src/components/annotation/markup.test.ts
+++ b/src/components/annotation/markup.test.ts
@@ -56,6 +56,20 @@ describe('waveform annotation markup', () => {
    ).toBeNull()
  })

+  it('snaps outside and between samples to the nearest complete-data point', () => {
+    const points = [
+      { x: 1, y: 10 },
+      { x: 2, y: 20 },
+      { x: 4, y: 40 },
+    ]
+    expect(findNearestPointByX(points, -10)).toEqual(points[0])
+    expect(findNearestPointByX(points, 3.1)).toEqual(points[2])
+    expect(findNearestPointByX(points, 10)).toEqual(points[2])
+    expect(findNearestPointByX(points, 2)).toEqual(points[1])
+    expect(findNearestPointByX([{ x: 2, y: 20 }], 2.1)).toEqual({ x: 2, y: 20 })
+    expect(findNearestPointByX(points, Number.NaN)).toBeNull()
+  })
+
  it('snaps annotations to nearest sample points while using interpolation for distance calculation', () => {
    const track = createTrack(0, 'series', 0, [
      { x: 0, y: 0 },
@@ -89,14 +103,16 @@ describe('waveform annotation markup', () => {
    expect(interpolateAnnotationPoint(points, 2, 'none')).toEqual({ x: 2, y: 10 })
  })

-  it('omits interpolated candidates for point-only series between samples', () => {
+  it('uses the nearest screen-space sample for point-only series', () => {
    const pointOnly = createTrack(0, 'points', 0, [
      { x: 0, y: 2 },
      { x: 2, y: 10 },
    ])
    pointOnly.series.lineType = 'none'

-    expect(findAnnotationSeriesCandidates([pointOnly], 1, 100, 50)).toEqual([])
+    expect(findAnnotationSeriesCandidates([pointOnly], 1, 5, 80)).toMatchObject([
+      { point: { x: 0, y: 2 }, screenX: 0, screenY: 80, distance: 5 },
+    ])
  })

  it('sorts line candidates by screen distance and keeps series metadata', () => {
--- a/src/components/annotation/markup.ts
+++ b/src/components/annotation/markup.ts
@@ -25,6 +25,25 @@ export const ANNOTATION_CONNECTOR_LENGTH = 32

 const pointBisector = bisector((point: { x: number }) => point.x)

+function findNearestPointOnScreen(
+  track: AnnotationTrackLayout,
+  pointerX: number,
+  pointerY: number,
+): { point: { x: number; y: number }; screenX: number; screenY: number; distance: number } | null {
+  let nearest: { point: { x: number; y: number }; screenX: number; screenY: number; distance: number } | null =
+    null
+  for (const point of track.series.points) {
+    if (!Number.isFinite(point.x) || !Number.isFinite(point.y)) continue
+    const screenX = track.xScale(point.x)
+    const screenY = track.top + track.yScale(point.y)
+    const distance = Math.hypot(screenX - pointerX, screenY - pointerY)
+    if (!nearest || distance < nearest.distance) {
+      nearest = { point, screenX, screenY, distance }
+    }
+  }
+  return nearest
+}
+
 export function findNearestPointByX(
  points: Array<{ x: number; y: number }>,
  xValue: number,
@@ -74,6 +93,20 @@ export function findAnnotationSeriesCandidates(
 ): AnnotationSeriesCandidate[] {
  return tracks
    .flatMap((track): AnnotationSeriesCandidate[] => {
+      if (track.series.lineType === 'none') {
+        const nearest = findNearestPointOnScreen(track, pointerX, pointerY)
+        if (!nearest) return []
+        return [
+          {
+            trackIndex: track.index,
+            seriesId: track.series.id,
+            name: track.series.name?.trim() || track.series.id,
+            color: track.series.color || DEFAULT_ANNOTATION_STYLE.borderColor,
+            unit: track.series.unit,
+            ...nearest,
+          },
+        ]
+      }
      const interpolatedPoint = interpolateAnnotationPoint(
        track.series.points,
        xValue,
--- a/src/components/annotation/useWaveformChartAnnotations.ts
+++ b/src/components/annotation/useWaveformChartAnnotations.ts
@@ -1,5 +1,5 @@
 import { pointer, type ScaleLinear } from 'd3'
-import type { ComputedRef, Ref } from 'vue'
+import { ref, type ComputedRef, type Ref } from 'vue'

 import type { WaveformAnnotation, WaveformInteractionMode } from '../data/types'
 import { findClosestTrackAtPointer } from '../core/layout'
@@ -9,7 +9,7 @@ import {
  ANNOTATION_AMBIGUITY_DISTANCE,
  ANNOTATION_HIT_RADIUS,
  findAnnotationSeriesCandidates,
-  interpolateAnnotationPoint,
+  findNearestPointByX,
 } from './markup'
 import type {
  AnnotationEditorAnchor,
@@ -78,6 +78,7 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {
    activeInteractionMode,
    isPresentationMode,
  } = context
+  const timeError = ref('')

  function toggleSeriesVisibility(seriesId: string) {
    if (!chartSeries.value.some((series) => series.id === seriesId)) return
@@ -127,6 +128,7 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {
    anchor: AnnotationEditorAnchor,
    candidates: AnnotationSeriesCandidate[],
  ) {
+    timeError.value = ''
    annotationInteraction.openCreate(hit, makeAnnotationId, anchor)
    editorSeriesOptions.value = candidates
    const draft = annotationInteraction.editorDraft.value
@@ -140,7 +142,6 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {
      }
    }
  }
-
  function changeDraftSeries(seriesId: string) {
    if (isPresentationMode.value) return
    const draft = annotationInteraction.editorDraft.value
@@ -149,24 +150,61 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {
      item.seriesList.some((series) => series.id === seriesId),
    )
    const series = track?.seriesList.find((item) => item.id === seriesId)
-    const point =
-      series && draft
-        ? interpolateAnnotationPoint(series.points, draft.annotation.x, series.lineType)
-        : null
-    if (!draft || !candidate || !track || !point) return
+    const validPoints = series?.points.filter(
+      (item) => Number.isFinite(item.x) && Number.isFinite(item.y),
+    )
+    const point = validPoints && draft ? findNearestPointByX(validPoints, draft.annotation.x) : null
+    if (!draft || !candidate || !track || !validPoints?.length) {
+      timeError.value = '当前波形没有有效数据'
+      return
+    }
+    if (draft.annotation.x < validPoints[0].x || draft.annotation.x > validPoints.at(-1)!.x) {
+      timeError.value = '时间超出当前波形范围'
+      return
+    }
+    timeError.value = ''
    draft.annotation = {
      ...draft.annotation,
      seriesId,
-      y: point.y,
+      y: point!.y,
      style: { ...draft.annotation.style, borderColor: candidate.color },
    }
  }
-
+  function changeDraftTime(displayValue: string) {
+    if (isPresentationMode.value) return
+    const draft = annotationInteraction.editorDraft.value
+    const displayTime = Number(displayValue)
+    if (!draft || !Number.isFinite(displayTime)) {
+      timeError.value = '请输入有效的时间'
+      return
+    }
+    const rawTime = props.timeUnit === 'ms' ? displayTime / 1000 : displayTime
+    const track = trackLayouts.value.find((item) =>
+      item.seriesList.some((series) => series.id === draft.annotation.seriesId),
+    )
+    const series = track?.seriesList.find((item) => item.id === draft.annotation.seriesId)
+    const validPoints = series?.points.filter(
+      (point) => Number.isFinite(point.x) && Number.isFinite(point.y),
+    )
+    if (!validPoints?.length) {
+      timeError.value = '当前波形没有有效数据'
+      return
+    }
+    const firstX = validPoints[0].x
+    const lastX = validPoints[validPoints.length - 1].x
+    if (rawTime < firstX || rawTime > lastX) {
+      timeError.value = '时间超出当前波形范围'
+      return
+    }
+    const point = findNearestPointByX(validPoints, rawTime)!
+    timeError.value = ''
+    draft.annotation = { ...draft.annotation, x: point.x, y: point.y }
+  }
  function cancelAnnotation() {
+    timeError.value = ''
    annotationInteraction.closeEditor()
    editorSeriesOptions.value = []
  }
-
  function resolveTrackAtPointer(
    pointerX: number,
    pointerY: number,
@@ -292,6 +330,7 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {

  function editContextAnnotation() {
    if (isPresentationMode.value) return
+    timeError.value = ''
    const menu = annotationInteraction.contextMenu.value
    const annotation = props.annotations.find((item) => item.id === menu?.annotationId)
    if (!annotation) return
@@ -328,7 +367,7 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {
  function confirmAnnotation(annotation: WaveformAnnotation) {
    if (isPresentationMode.value) return
    const draft = annotationInteraction.editorDraft.value
-    if (!draft) return
+    if (!draft || timeError.value) return
    if (draft.mode === 'add') {
      emit('update:annotations', [...props.annotations, annotation])
      emit('annotation-create', annotation)
@@ -345,6 +384,8 @@ export function useWaveformChartAnnotations(context: AnnotationContext) {
  return {
    toggleSeriesVisibility,
    changeDraftSeries,
+    changeDraftTime,
+    timeError,
    cancelAnnotation,
    resolveTrackAtPointer,
    handleAnnotationClick,
--- a/src/components/core/constants.test.ts
+++ b/src/components/core/constants.test.ts
@@ -0,0 +1,29 @@
+import { describe, expect, it } from 'vitest'
+
+import { channelColors } from './constants'
+
+describe('channelColors', () => {
+  it('contains the referenced dark palette followed by twenty supplemental colors', () => {
+    expect(channelColors).toHaveLength(30)
+    expect(channelColors.slice(0, 10)).toEqual([
+      '#0960bd',
+      '#ff7f0e',
+      '#2ca02c',
+      '#d62728',
+      '#9467bd',
+      '#8c564b',
+      '#e377c2',
+      '#7f7f7f',
+      '#bcbd22',
+      '#17becf',
+    ])
+    expect(new Set(channelColors).size).toBe(channelColors.length)
+  })
+
+  it('wraps around after the thirtieth color for automatic series assignment', () => {
+    expect(channelColors[0]).toBe('#0960bd')
+    expect(channelColors[29]).toBe('#31572c')
+    expect(channelColors[30 % channelColors.length]).toBe(channelColors[0])
+    expect(channelColors[31 % channelColors.length]).toBe(channelColors[1])
+  })
+})
--- a/src/components/core/constants.ts
+++ b/src/components/core/constants.ts
@@ -125,19 +125,41 @@ export const TITLE_LINE_HEIGHT = 1.2
 // ==================== 样式常量 ====================

 /**
- * 通道默认颜色列表
+ * 多系列波形的默认颜色列表。
+ *
+ * 颜色保持较深并具备足够辨识度，避免大量系列同时绘制时使用浅色导致线条难以观察。
 */
 export const channelColors = [
  '#0960bd',
  '#ff7f0e',
-  '#389e0d',
-  '#cf1322',
-  '#531dab',
-  '#08979c',
-  '#c41d7f',
-  '#434343',
-  '#7cb305',
-  '#1d39c4',
+  '#2ca02c',
+  '#d62728',
+  '#9467bd',
+  '#8c564b',
+  '#e377c2',
+  '#7f7f7f',
+  '#bcbd22',
+  '#17becf',
+  '#005f73',
+  '#0a9396',
+  '#ae2012',
+  '#bb3e03',
+  '#ca6702',
+  '#ee9b00',
+  '#9b2226',
+  '#3a0ca3',
+  '#4361ee',
+  '#4895ef',
+  '#560bad',
+  '#7209b7',
+  '#b5179e',
+  '#f72585',
+  '#006d77',
+  '#2f3e46',
+  '#354f52',
+  '#52796f',
+  '#800f2f',
+  '#31572c',
 ]

 /**
--- a/src/components/core/trackLayoutBuilder.ts
+++ b/src/components/core/trackLayoutBuilder.ts
@@ -16,6 +16,7 @@ import type {
  WaveformDisplayMode,
  WaveformOverlayMode,
  WaveformPoint,
+  WaveformXDomainStrategy,
  WaveformXAxisLabelFormatter,
 } from '../../types'
 import { buildMinorTicks, formatXAxisLabel } from '../../utils'
@@ -26,6 +27,7 @@ import {
 } from './grid'
 import { axisTextMetrics, resolveYAxisSeriesGroups } from './layout'
 import type { DisplaySeries, DisplayTrack, TrackLayout, WaveformYAxisLayout } from './types'
+import { applyXDomainStrategy } from './xDomain'
 import {
  Y_AXIS_LABEL_BAND_WIDTH,
  Y_AXIS_LABEL_GAP,
@@ -46,6 +48,7 @@ export interface BuildTrackLayoutsOptions {
  sharedZoomDomain: [number, number]
  initialXDomain?: [number, number]
  initialXDomains?: Record<string, [number, number]>
+  xDomainStrategy?: WaveformXDomainStrategy
  fixedYDomain?: [number, number]
  fixedYDomains?: Record<string, [number, number]>
  yDomains?: Record<string, [number, number]>
@@ -57,6 +60,21 @@ export interface BuildTrackLayoutsOptions {
  showCompactEmptyTracks: boolean
 }

+function resolveIndependentXDomain(
+  track: DisplayTrack,
+  seriesId: string,
+  options: BuildTrackLayoutsOptions,
+): [number, number] {
+  const strategy = options.xDomainStrategy ?? { type: 'data' }
+  const explicitDomain =
+    options.initialXDomains?.[track.id] ??
+    options.initialXDomains?.[seriesId] ??
+    options.initialXDomain
+  return explicitDomain
+    ? applyXDomainStrategy(explicitDomain, strategy, true)
+    : applyXDomainStrategy(track.xDomain, strategy)
+}
+
 export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayout[] {
  const visibleCells = options.cells.map((cell) => ({ ...cell, hasSeries: Boolean(cell.series) }))
  const bottomCells = getBottomRowCellIndexes(visibleCells, options.grid.columnCount)
@@ -88,13 +106,7 @@ export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayou
    const series = displayTrack.visibleSeries[0] ?? displayTrack.series[0] ?? emptySeries
    const baseXScale =
      options.displayMode === 'independent'
-        ? scaleLinear(
-            options.initialXDomains?.[displayTrack.id] ??
-              options.initialXDomains?.[series.id] ??
-              options.initialXDomain ??
-              displayTrack.xDomain,
-            [0, cell.width],
-          )
+        ? scaleLinear(resolveIndependentXDomain(displayTrack, series.id, options), [0, cell.width])
        : scaleLinear(options.sharedZoomDomain, [0, cell.width])
    const transform =
      options.displayMode === 'independent'
--- a/src/components/core/types.ts
+++ b/src/components/core/types.ts
@@ -13,6 +13,7 @@ import type { NormalizedWaveformGridLineOptions } from './grid'
 */
 export interface DisplaySeries {
  id: string
+  shotNo?: string
  trackId?: string
  name: string
  unit?: string
@@ -63,6 +64,7 @@ export interface WaveformYAxisLayout {
 */
 export interface HoveredSeriesPoint {
  id: string
+  shotNo?: string
  name: string
  unit?: string
  color: string
--- a/src/components/core/useWaveformChartLifecycle.ts
+++ b/src/components/core/useWaveformChartLifecycle.ts
@@ -204,6 +204,7 @@ export function useWaveformChartLifecycle(context: LifecycleContext) {
      () => props.minVisiblePoints,
      () => props.initialXDomain,
      () => props.initialXDomains,
+      () => props.xDomainStrategy,
      () => props.displayMode,
      () => chartTracks.value.length,
      currentPage,
--- a/src/components/core/useWaveformLayout.ts
+++ b/src/components/core/useWaveformLayout.ts
@@ -34,6 +34,7 @@ import {
 import type { DisplaySeries, DisplayTrack, TrackLayout } from './types'
 import type { PreparedWaveformSeries } from './useWaveformData'
 import type { ResolvedWaveformChartProps } from './waveformChartTypes'
+import { applyXDomainStrategy } from './xDomain'
 import type { useWaveformAnnotationInteraction } from '../annotation'

 interface LayoutContext {
@@ -224,9 +225,13 @@ export function useWaveformLayout(context: LayoutContext) {
      Number.isFinite(domain[1]) &&
      domain[0] !== domain[1]
    ) {
-      return domain[0] < domain[1] ? domain : [domain[1], domain[0]]
+      return applyXDomainStrategy(
+        domain[0] < domain[1] ? domain : [domain[1], domain[0]],
+        props.xDomainStrategy,
+        true,
+      )
    }
-    return sharedXDomain.value
+    return applyXDomainStrategy(sharedXDomain.value, props.xDomainStrategy)
  })
  const resolveInitialTrackDomain = (track: TrackLayout): [number, number] => {
    const configuredDomain =
@@ -239,11 +244,18 @@ export function useWaveformLayout(context: LayoutContext) {
      Number.isFinite(configuredDomain[1]) &&
      configuredDomain[0] !== configuredDomain[1]
    ) {
-      return configuredDomain[0] < configuredDomain[1]
-        ? configuredDomain
-        : [configuredDomain[1], configuredDomain[0]]
+      return applyXDomainStrategy(
+        configuredDomain[0] < configuredDomain[1]
+          ? configuredDomain
+          : [configuredDomain[1], configuredDomain[0]],
+        props.xDomainStrategy,
+        true,
+      )
    }
-    return paddedDomain(track.seriesList.flatMap((series) => series.xDomain))
+    return applyXDomainStrategy(
+      paddedDomain(track.seriesList.flatMap((series) => series.xDomain)),
+      props.xDomainStrategy,
+    )
  }
  const sharedZoomDomain = computed(
    () =>
@@ -272,6 +284,7 @@ export function useWaveformLayout(context: LayoutContext) {
      sharedZoomDomain: sharedZoomDomain.value,
      initialXDomain: props.initialXDomain ? initialXDomain.value : undefined,
      initialXDomains: props.initialXDomains,
+      xDomainStrategy: props.xDomainStrategy,
      fixedYDomain: props.yDomain,
      fixedYDomains: props.yDomains,
      yDomains:
--- a/src/components/core/waveformChartTypes.ts
+++ b/src/components/core/waveformChartTypes.ts
@@ -11,8 +11,10 @@ import type {
  WaveformPoint,
  WaveformRenderingOptions,
  WaveformTitleOptions,
+  WaveformXDomainStrategy,
  WaveformZeroLineOptions,
  WaveformZoomEndPayload,
+  WaveformZoomResetPayload,
 } from '../data/types'
 import type { WaveformGridOptions } from './grid'

@@ -32,6 +34,7 @@ export interface WaveformChartProps {
  minVisiblePoints?: number
  initialXDomain?: [number, number]
  initialXDomains?: Record<string, [number, number]>
+  xDomainStrategy?: WaveformXDomainStrategy
  yDomain?: [number, number]
  yDomains?: Record<string, [number, number]>
  timeUnit?: 's' | 'ms'
@@ -62,6 +65,7 @@ type DefaultedProp =
  | 'zoomable'
  | 'pannable'
  | 'minVisiblePoints'
+  | 'xDomainStrategy'
  | 'timeUnit'
  | 'annotations'
  | 'annotationsVisible'
@@ -82,7 +86,7 @@ export interface WaveformChartEmit {
  (event: 'point-hover', point: WaveformPoint | null): void
  (event: 'zoom-change', domain: [number, number]): void
  (event: 'zoom-end', payload: WaveformZoomEndPayload): void
-  (event: 'zoom-reset'): void
+  (event: 'zoom-reset', payload: WaveformZoomResetPayload): void
  (event: 'update:annotations', annotations: WaveformAnnotation[]): void
  (event: 'update:hidden-series-ids', ids: string[]): void
  (
--- a/src/components/core/xDomain.test.ts
+++ b/src/components/core/xDomain.test.ts
@@ -0,0 +1,28 @@
+import { describe, expect, it } from 'vitest'
+
+import { applyXDomainStrategy } from './xDomain'
+
+describe('applyXDomainStrategy', () => {
+  it('keeps the exact data domain by default', () => {
+    expect(applyXDomainStrategy([0, 4999.999], { type: 'data' })).toEqual([0, 4999.999])
+  })
+
+  it('expands both bounds to stable nice values', () => {
+    expect(applyXDomainStrategy([123, 456], { type: 'nice' })).toEqual([100, 500])
+  })
+
+  it('can expand only the end bound', () => {
+    expect(applyXDomainStrategy([123, 456], { type: 'nice', bounds: 'end' })).toEqual([123, 500])
+  })
+
+  it('keeps explicit domains exact unless they are included', () => {
+    expect(applyXDomainStrategy([123, 456], { type: 'nice' }, true)).toEqual([123, 456])
+    expect(applyXDomainStrategy([123, 456], { type: 'nice', includeExplicit: true }, true)).toEqual(
+      [100, 500],
+    )
+  })
+
+  it('falls back to the default tick count for invalid values', () => {
+    expect(applyXDomainStrategy([0, 4999.999], { type: 'nice', tickCount: 0 })).toEqual([0, 5000])
+  })
+})
--- a/src/components/core/xDomain.ts
+++ b/src/components/core/xDomain.ts
@@ -0,0 +1,25 @@
+import { scaleLinear } from 'd3'
+
+import type { WaveformXDomainStrategy } from '../../types'
+
+const DEFAULT_NICE_TICK_COUNT = 10
+
+function resolveTickCount(value: number | undefined): number {
+  if (!Number.isFinite(value) || (value ?? 0) < 1) return DEFAULT_NICE_TICK_COUNT
+  return Math.max(1, Math.trunc(value as number))
+}
+
+/** Derives a viewport domain without changing any source coordinates. */
+export function applyXDomainStrategy(
+  domain: [number, number],
+  strategy: WaveformXDomainStrategy,
+  explicit = false,
+): [number, number] {
+  if (strategy.type !== 'nice' || (explicit && !strategy.includeExplicit)) return [...domain]
+
+  const niceDomain = scaleLinear()
+    .domain(domain)
+    .nice(resolveTickCount(strategy.tickCount))
+    .domain() as [number, number]
+  return strategy.bounds === 'end' ? [domain[0], niceDomain[1]] : niceDomain
+}
--- a/src/components/data/types.ts
+++ b/src/components/data/types.ts
@@ -9,7 +9,9 @@ export type {
  WaveformDisplayMode,
  WaveformOverlayMode,
  WaveformInteractionMode,
+  WaveformXDomainStrategy,
  WaveformZoomEndPayload,
+  WaveformZoomResetPayload,
  WaveformAnnotationStyle,
  WaveformAnnotation,
  WaveformRenderingOptions,
--- a/src/components/interaction/WaveformTooltip.test.ts
+++ b/src/components/interaction/WaveformTooltip.test.ts
@@ -80,7 +80,7 @@ describe('WaveformTooltip', () => {
    expect(tooltip.attributes('style')).toContain('max-width: 280px')
  })

-  it('shows resolved asymmetric errors beside the hovered value', () => {
+  it('omits units and errors from the strict x/y value format', () => {
    const pointWithErrors = { x: 1, y: 12, error: 1, upperError: 2 }
    const wrapper = mount(WaveformTooltip, {
      props: {
@@ -102,10 +102,12 @@ describe('WaveformTooltip', () => {
      },
    })

-    expect(wrapper.get('.waveform-tooltip__series small').text()).toBe('(+2 / -1)')
+    expect(wrapper.get('.waveform-tooltip__value').text()).toBe('(x:1 y:12)')
+    expect(wrapper.get('.waveform-tooltip__value').text()).not.toContain('C')
+    expect(wrapper.get('.waveform-tooltip__value').text()).not.toContain('+2')
  })

-  it('keeps a formatted value and its unit in one value container', () => {
+  it('renders the configured shot number, channel, and formatted coordinates', () => {
    const hoveredPoint = { x: 1, y: -1405.4932 }
    const wrapper = mount(WaveformTooltip, {
      props: {
@@ -117,6 +119,7 @@ describe('WaveformTooltip', () => {
          {
            trackIndex: 0,
            name: 'ENG8KJXAc(10001)',
+            shotNo: '炮 7',
            color: '#ffb43b',
            unit: 'A',
            point: hoveredPoint,
@@ -127,26 +130,31 @@ describe('WaveformTooltip', () => {
      },
    })

-    expect(wrapper.get('.waveform-tooltip__value').text()).toBe('-1,405.4932 A')
+    expect(wrapper.get('.waveform-tooltip__series-label').text()).toBe('炮 7： ENG8KJXAc(10001)(A)')
+    expect(wrapper.get('.waveform-tooltip__value').text()).toBe('(x:1,000 y:-1,405.4932)')
  })

-  it('formats tooltip time with at most four decimal places', () => {
+  it('renders each series row with the formatted x coordinate and series label', () => {
    const wrapper = mount(WaveformTooltip, {
      props: {
        visible: true,
        position: { x: 10, y: 10 },
        timeUnit: 's',
        hoveredPoint: { x: 1.234567, y: 12 },
-        seriesPoints: [],
+        seriesPoints: [
+          { trackIndex: 0, name: '温度', color: '#f00', point: { x: 1.234567, y: 12 } },
+        ],
        containerWidth: 400,
        containerHeight: 300,
      },
    })

-    expect(wrapper.get('.waveform-tooltip__time').text()).toBe('s: 1.2346')
+    expect(wrapper.find('.waveform-tooltip__time').exists()).toBe(false)
+    expect(wrapper.get('.waveform-tooltip__series-label').text()).toBe('未配置炮号： 温度')
+    expect(wrapper.get('.waveform-tooltip__value').text()).toBe('(x:1.2346 y:12)')
  })

-  it('omits the error label when both resolved errors are zero', () => {
+  it('uses the fallback shot number when shotNo is blank', () => {
    const point = { x: 1, y: 12 }
    const wrapper = mount(WaveformTooltip, {
      props: {
@@ -160,6 +168,6 @@ describe('WaveformTooltip', () => {
      },
    })

-    expect(wrapper.find('.waveform-tooltip__series small').exists()).toBe(false)
+    expect(wrapper.get('.waveform-tooltip__series-label').text()).toBe('未配置炮号： 温度')
  })
 })
--- a/src/components/interaction/WaveformTooltip.vue
+++ b/src/components/interaction/WaveformTooltip.vue
@@ -1,12 +1,12 @@
 <script setup lang="ts">
 import { computed } from 'vue'
-import { resolveWaveformPointErrors } from '../../core'
 import { formatTooltipNumber, formatTooltipTime } from '../../utils'
 import type { WaveformPoint } from '../data/types'

 interface SeriesPoint {
  trackIndex: number
  name: string
+  shotNo?: string
  color: string
  unit?: string
  point: WaveformPoint
@@ -34,7 +34,7 @@ const props = defineProps<Props>()
 const tooltipGap = 12
 const containerPadding = 8
 const tooltipPlacementWidth = 238
-const tooltipMaxWidth = 320
+const tooltipMaxWidth = 560
 const tooltipHorizontalPadding = 20
 const tooltipLineHeight = 20

@@ -45,18 +45,18 @@ function estimateLineCount(text: string, width: number): number {
 }

 function formatSeriesText(seriesPoint: SeriesPoint): string {
-  const error = formatError(seriesPoint.point)
-  return `${seriesPoint.name ? `${seriesPoint.name}: ` : ''}${formatTooltipNumber(seriesPoint.point.y)}${
-    seriesPoint.unit ? ` ${seriesPoint.unit}` : ''
-  }${error ? ` ${error}` : ''}`
+  const timeText = formatTooltipTime(props.hoveredPoint?.x ?? seriesPoint.point.x, props.timeUnit)
+  return `${seriesPoint.shotNo?.trim() || '未配置炮号'}： ${seriesPoint.name}${
+    seriesPoint.unit ? `(${seriesPoint.unit})` : ''
+  }  (x:${timeText} y:${formatTooltipNumber(seriesPoint.point.y)})`
 }

-function estimateTooltipHeight(width: number, timeText: string): number {
+function estimateTooltipHeight(width: number): number {
  const seriesLines = props.seriesPoints.reduce(
    (total, seriesPoint) => total + estimateLineCount(formatSeriesText(seriesPoint), width),
    0,
  )
-  return 16 + tooltipLineHeight * (estimateLineCount(timeText, width) + seriesLines) + 5
+  return 16 + tooltipLineHeight * seriesLines + 5
 }

 const tooltipStyle = computed(() => {
@@ -84,25 +84,18 @@ const tooltipStyle = computed(() => {
        : { left: `${containerPadding}px`, maxWidth: `${availableWidth}px` }

  const maxWidth = Number.parseFloat(horizontalStyle.maxWidth)
-  const timeText = `${props.timeUnit}: ${formatTooltipTime(props.hoveredPoint.x, props.timeUnit)}`
-
  return {
    ...horizontalStyle,
    top: `${Math.max(
      8,
      Math.min(
        props.position.y - 18,
-        props.containerHeight - estimateTooltipHeight(maxWidth, timeText) - 8,
+        props.containerHeight - estimateTooltipHeight(maxWidth) - 8,
      ),
    )}px`,
  }
 })

-function formatError(point: WaveformPoint): string | null {
-  const { lower, upper } = resolveWaveformPointErrors(point)
-  if (lower === 0 && upper === 0) return null
-  return `(+${formatTooltipNumber(upper)} / -${formatTooltipNumber(lower)})`
-}
 </script>

 <template>
@@ -111,9 +104,6 @@ function formatError(point: WaveformPoint): string | null {
    class="waveform-tooltip waveform-chart__tooltip"
    :style="tooltipStyle"
  >
-    <span class="waveform-tooltip__time waveform-chart__tooltip-time">
-      {{ timeUnit }}: {{ formatTooltipTime(hoveredPoint.x, timeUnit) }}
-    </span>
    <span
      v-for="seriesPoint in seriesPoints"
      :key="`${seriesPoint.trackIndex}-${seriesPoint.name}`"
@@ -121,12 +111,12 @@ function formatError(point: WaveformPoint): string | null {
    >
      <i :style="{ backgroundColor: seriesPoint.color }" />
      <span class="waveform-tooltip__series-content">
-        <strong v-if="seriesPoint.name">{{ seriesPoint.name }}:</strong>
-        <span class="waveform-tooltip__value">
-          {{ formatTooltipNumber(seriesPoint.point.y)
-          }}{{ seriesPoint.unit ? ` ${seriesPoint.unit}` : '' }}
-          <small v-if="formatError(seriesPoint.point)">{{ formatError(seriesPoint.point) }}</small>
-        </span>
+        <span class="waveform-tooltip__series-label">{{ seriesPoint.shotNo?.trim() || '未配置炮号' }}： {{
+          seriesPoint.name
+        }}<template v-if="seriesPoint.unit">({{ seriesPoint.unit }})</template></span>
+        <span class="waveform-tooltip__value">(x:{{ formatTooltipTime(hoveredPoint.x, timeUnit) }} y:{{
+          formatTooltipNumber(seriesPoint.point.y)
+        }})</span>
      </span>
    </span>
  </div>
@@ -138,26 +128,17 @@ function formatError(point: WaveformPoint): string | null {
  position: absolute;
  z-index: 2;
  display: grid;
-  gap: 3px;
+  gap: 2px;
  width: max-content;
-  max-width: min(320px, calc(100% - 16px));
-  padding: 8px 10px;
-  color: #333;
-  font:
-    12px/1.45 ui-monospace,
-    SFMono-Regular,
-    Consolas,
-    monospace;
+  max-width: min(560px, calc(100% - 16px));
+  padding: 9px 12px;
+  color: #505050;
+  font: 14px/1.35 Arial, sans-serif;
  pointer-events: none;
  background: #fff;
-  border: 1px solid #d9d9d9;
-  border-radius: 2px;
-  box-shadow: 0 4px 12px rgb(16 24 40 / 12%);
-}
-
-.waveform-tooltip__time {
-  padding-bottom: 4px;
-  border-bottom: 1px solid #f0f0f0;
+  border: 1px solid #e3e7eb;
+  border-radius: 4px;
+  box-shadow: 0 3px 10px rgb(16 24 40 / 15%);
 }

 .waveform-tooltip__series {
@@ -176,9 +157,24 @@ function formatError(point: WaveformPoint): string | null {
 }

 .waveform-tooltip__series-content {
+  display: flex;
+  flex-wrap: nowrap;
+  gap: 12px;
+  align-items: baseline;
  min-width: 0;
-  overflow-wrap: anywhere;
-  white-space: normal;
+}
+
+.waveform-tooltip__series-label {
+  flex: 1 1 auto;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.waveform-tooltip__value {
+  flex: 0 0 auto;
+  white-space: nowrap;
 }

 .waveform-tooltip__series strong {
@@ -186,7 +182,7 @@ function formatError(point: WaveformPoint): string | null {
 }

 .waveform-tooltip__value {
-  overflow-wrap: anywhere;
+  color: #555;
 }

 .waveform-tooltip__series small {
--- a/src/components/interaction/useWaveformHover.ts
+++ b/src/components/interaction/useWaveformHover.ts
@@ -85,6 +85,7 @@ export function useWaveformHover(context: HoverContext) {
    point: WaveformPoint,
  ): HoveredSeriesPoint => ({
    id: series.id,
+    shotNo: series.shotNo,
    name: series.name,
    color: series.color,
    unit: series.unit,
--- a/src/components/interaction/useWaveformViewport.ts
+++ b/src/components/interaction/useWaveformViewport.ts
@@ -346,9 +346,23 @@ export function useWaveformViewport(context: ViewportContext) {
  }
  const requestViewportReset = (event: MouseEvent) => {
    if (isPresentationMode.value || !props.zoomable || !isZoomMode.value) return
+    if (props.displayMode === 'independent') {
+      const target = event.target instanceof Element ? event.target : null
+      const overlay = target?.closest('[data-independent-overlay-index]')
+      const trackIndex = Number(overlay?.getAttribute('data-independent-overlay-index'))
+      const track = trackLayouts.value.find((item) => item.index === trackIndex)
+      if (!track) return
+      event.preventDefault()
+      resetViewport(trackIndex)
+      emit('zoom-reset', {
+        trackIndex,
+        seriesIds: track.legendSeries.map((series) => series.id),
+      })
+      return
+    }
    event.preventDefault()
    resetViewport()
-    emit('zoom-reset')
+    emit('zoom-reset', {})
  }
  return {
    selectionBox,
--- a/src/components/waveform.ts
+++ b/src/components/waveform.ts
@@ -9,6 +9,7 @@ export type {
  WaveformDisplayMode,
  WaveformOverlayMode,
  WaveformInteractionMode,
+  WaveformXDomainStrategy,
  WaveformAnnotationStyle,
  WaveformAnnotation,
  WaveformRenderingOptions,
--- a/src/components/waveformChartCases/annotationEditingAndReprojection.test.ts
+++ b/src/components/waveformChartCases/annotationEditingAndReprojection.test.ts
@@ -1,10 +1,18 @@
-import { flushPromises } from '@vue/test-utils'
+import { DOMWrapper, flushPromises } from '@vue/test-utils'
 import { describe, expect, it } from 'vitest'

 import { flushAnimationFrames } from '../../test/setup'

 import { mountSizedChart } from '../../test/waveformChart'

+function getAnnotationEditor() {
+  const editor = Array.from(document.body.querySelectorAll<HTMLElement>('[role="dialog"]'))
+    .filter((element) => element.closest('.waveform-annotation-editor'))
+    .at(-1)
+  if (!editor) throw new Error('Expected annotation editor modal to be mounted')
+  return new DOMWrapper(editor)
+}
+
 describe('WaveformChart', () => {
  it('edits and immediately deletes existing annotations without mutating props', async () => {
    const sourceAnnotation = {
@@ -31,8 +39,10 @@ describe('WaveformChart', () => {
    })
    await wrapper.get('.waveform-annotation-context-menu button').trigger('click')
    await flushPromises()
-    await wrapper.get('textarea[aria-label="标注文本"]').setValue('新文字')
-    await wrapper.get('.waveform-annotation-editor button.is-primary').trigger('click')
+    const editor = getAnnotationEditor()
+    await editor.get('textarea[aria-label="标注文本"]').setValue('新文字')
+    await editor.get('button.ant-btn-primary').trigger('click')
+    await flushPromises()

    const updated = wrapper.emitted('update:annotations')?.at(-1)?.[0] as
      Array<{ text: string }> | undefined
--- a/src/components/waveformChartCases/compactAndSharedHover.test.ts
+++ b/src/components/waveformChartCases/compactAndSharedHover.test.ts
@@ -179,10 +179,10 @@ describe('WaveformChart', () => {
    await flushPromises()

    const tooltip = wrapper.get('.waveform-chart__tooltip')
-    expect(tooltip.text()).toContain('BT2_2M:')
-    expect(tooltip.text()).toContain('2 T')
-    expect(tooltip.text()).toContain('BT1_2M:')
-    expect(tooltip.text()).toContain('4 T')
+    expect(tooltip.text()).toContain('未配置炮号： BT2_2M')
+    expect(tooltip.text()).toContain('(x:1,000 y:2)')
+    expect(tooltip.text()).toContain('未配置炮号： BT1_2M')
+    expect(tooltip.text()).toContain('(x:1,000 y:4)')
    const crosshairLines = wrapper.findAll('.waveform-chart__crosshair line')
    expect(crosshairLines).toHaveLength(2)
    crosshairLines.forEach((line) => {
--- a/src/components/waveformChartCases/dataAndHoverPerformance.test.ts
+++ b/src/components/waveformChartCases/dataAndHoverPerformance.test.ts
@@ -178,7 +178,7 @@ describe('WaveformChart', () => {
    await flushPromises()
    expect(wrapper.emitted('point-hover')?.at(-1)).toEqual([{ x: 1, y: 5 }])
    expect(wrapper.find('.waveform-chart__tooltip').exists()).toBe(true)
-    expect(wrapper.get('.waveform-chart__tooltip-time').text()).toBe('ms: 1,000')
+    expect(wrapper.get('.waveform-tooltip__series-label').text()).toContain('未配置炮号：')
    const crosshairLines = wrapper.findAll('.waveform-chart__crosshair line')
    expect(crosshairLines).toHaveLength(1)
    expect(crosshairLines[0].attributes('x1')).toBe(crosshairLines[0].attributes('x2'))
@@ -189,6 +189,46 @@ describe('WaveformChart', () => {
    expect(wrapper.emitted('point-hover')?.at(-1)).toEqual([null])
  })

+  it('clears hover when the pointer leaves the chart and restores it only after a new plot move', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 5 },
+        ],
+      },
+      { grid: { rowCount: 1, columnCount: 1 } },
+    )
+    const overlay = wrapper.get('.waveform-chart__overlay')
+    const overlayWidth = Number(overlay.attributes('width'))
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width: overlayWidth, height: 290 }),
+    })
+
+    overlay.element.dispatchEvent(
+      new MouseEvent('pointermove', { clientX: overlayWidth, clientY: 120, bubbles: true }),
+    )
+    flushAnimationFrames()
+    await flushPromises()
+    expect(wrapper.find('.waveform-chart__tooltip').exists()).toBe(true)
+
+    await wrapper.trigger('pointerleave')
+    expect(wrapper.find('.waveform-chart__tooltip').exists()).toBe(false)
+    expect(wrapper.find('.waveform-chart__crosshair').exists()).toBe(false)
+    expect(wrapper.emitted('point-hover')?.at(-1)).toEqual([null])
+
+    await wrapper.trigger('pointerenter')
+    expect(wrapper.find('.waveform-chart__tooltip').exists()).toBe(false)
+
+    overlay.element.dispatchEvent(
+      new MouseEvent('pointermove', { clientX: 0, clientY: 120, bubbles: true }),
+    )
+    flushAnimationFrames()
+    await flushPromises()
+    expect(wrapper.find('.waveform-chart__tooltip').exists()).toBe(true)
+  })
+
  it('hides the numeric tooltip and crosshair when showTooltip is disabled', async () => {
    const wrapper = await mountSizedChart(
      {
@@ -303,7 +343,7 @@ describe('WaveformChart', () => {
    flushAnimationFrames()
    await flushPromises()

-    expect(wrapper.get('.waveform-chart__tooltip-time').text()).toBe('ms: 1,000')
+    expect(wrapper.get('.waveform-tooltip__series-label').text()).toContain('未配置炮号：')
    expect(wrapper.findAll('.waveform-chart__crosshair line')).toHaveLength(1)
    expect(wrapper.get('.waveform-chart__line').element).toBe(pathBeforeHover)
    expect(chartUpdate).not.toHaveBeenCalled()
--- a/src/components/waveformChartCases/interactionAndAnnotationCreation.test.ts
+++ b/src/components/waveformChartCases/interactionAndAnnotationCreation.test.ts
@@ -1,10 +1,18 @@
-import { flushPromises } from '@vue/test-utils'
+import { DOMWrapper, flushPromises } from '@vue/test-utils'
 import { describe, expect, it } from 'vitest'

 import { flushAnimationFrames, pendingAnimationFrameCount } from '../../test/setup'

 import { mountSizedChart } from '../../test/waveformChart'

+function getAnnotationEditor() {
+  const editor = Array.from(document.body.querySelectorAll<HTMLElement>('[role="dialog"]'))
+    .filter((element) => element.closest('.waveform-annotation-editor'))
+    .at(-1)
+  if (!editor) throw new Error('Expected annotation editor modal to be mounted')
+  return new DOMWrapper(editor)
+}
+
 describe('WaveformChart', () => {
  it('zooms only the active independent track and resets when the mode changes', async () => {
    const wrapper = await mountSizedChart({
@@ -172,9 +180,10 @@ describe('WaveformChart', () => {
    )
    await flushPromises()

-    expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(true)
-    await wrapper.get('textarea[aria-label="标注文本"]').setValue('峰值点')
-    await wrapper.get('.waveform-annotation-editor button.is-primary').trigger('click')
+    const editor = getAnnotationEditor()
+    await editor.get('textarea[aria-label="标注文本"]').setValue('峰值点')
+    await editor.get('button.ant-btn-primary').trigger('click')
+    await flushPromises()

    const annotations = wrapper.emitted('update:annotations')?.at(-1)?.[0] as
      Array<{ seriesId: string; x: number; y: number; text: string }> | undefined
@@ -209,10 +218,10 @@ describe('WaveformChart', () => {
      }),
    )
    await flushPromises()
-    expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(true)
-    expect(wrapper.get('.waveform-annotation-editor').attributes('aria-modal')).toBe('true')
-    expect(wrapper.find('.waveform-annotation-editor__panel').exists()).toBe(true)
-    const textarea = wrapper.get('textarea[aria-label="标注文本"]')
+    const editor = getAnnotationEditor()
+    expect(editor.attributes('role')).toBe('dialog')
+    expect(editor.find('.waveform-annotation-editor__content').exists()).toBe(true)
+    const textarea = editor.get('textarea[aria-label="标注文本"]')
    const textareaContextMenu = new MouseEvent('contextmenu', {
      bubbles: true,
      cancelable: true,
@@ -220,7 +229,8 @@ describe('WaveformChart', () => {
    expect(textarea.element.dispatchEvent(textareaContextMenu)).toBe(true)
    expect(textareaContextMenu.defaultPrevented).toBe(false)
    await textarea.setValue('右键标注')
-    await wrapper.get('.waveform-annotation-editor button.is-primary').trigger('click')
+    await editor.get('button.ant-btn-primary').trigger('click')
+    await flushPromises()

    // Annotation snaps to nearest sample point (x=1, y=5)
    expect(wrapper.emitted('update:annotations')?.at(-1)?.[0]).toMatchObject([
@@ -278,20 +288,20 @@ describe('WaveformChart', () => {
    )
    await flushPromises()
    expect(
-      wrapper
-        .find('select[aria-label="选择标注波形"]')
+      getAnnotationEditor()
+        .get('select[aria-label="选择标注波形"]')
        .findAll('option')
        .map((item) => item.text()),
    ).toEqual(['通道 A'])

-    await wrapper.get('button[aria-label="关闭标注编辑器"]').trigger('click')
+    await getAnnotationEditor().get('.ant-modal-close').trigger('click')
    overlays[0].element.dispatchEvent(
      new MouseEvent('contextmenu', { clientX: 356, clientY: 230, bubbles: true }),
    )
    await flushPromises()
    expect(
-      wrapper
-        .find('select[aria-label="选择标注波形"]')
+      getAnnotationEditor()
+        .get('select[aria-label="选择标注波形"]')
        .findAll('option')
        .map((item) => item.text()),
    ).toEqual(['通道 B'])
--- a/src/components/waveformChartCases/legendVisibility.test.ts
+++ b/src/components/waveformChartCases/legendVisibility.test.ts
@@ -7,14 +7,39 @@ import WaveformChartView from '../WaveformChartView.vue'

 import { gridSeries, mountSizedChart, visibilitySeries } from '../../test/waveformChart'

+function annotationEditorExists() {
+  return Boolean(
+    Array.from(document.body.querySelectorAll<HTMLElement>('[role="dialog"]'))
+      .filter((element) => element.closest('.waveform-annotation-editor'))
+      .at(-1),
+  )
+}
+
 describe('WaveformChart', () => {
+  it('shows legends when a track contains at least two series', async () => {
+    const oneSeries = visibilitySeries()
+    if (oneSeries.kind === 'series') oneSeries.series = oneSeries.series.slice(0, 1)
+    const withoutLegend = await mountSizedChart(oneSeries, {
+      grid: { rowCount: 1, columnCount: 1 },
+    })
+    expect(withoutLegend.findAll('.waveform-chart__legend')).toHaveLength(0)
+
+    const twoSeries = visibilitySeries()
+    if (twoSeries.kind === 'series') twoSeries.series = twoSeries.series.slice(0, 2)
+    const withLegend = await mountSizedChart(twoSeries, {
+      grid: { rowCount: 1, columnCount: 1 },
+    })
+    expect(withLegend.findAll('.waveform-chart__legend')).toHaveLength(1)
+    expect(withLegend.find('.waveform-chart__legend').attributes('data-position')).toBe('top-right')
+  })
+
  it('resolves legend positions by stable track id across pages', async () => {
    const wrapper = await mountSizedChart(
      {
        kind: 'series',
-        series: Array.from({ length: 8 }, (_, index) => ({
+        series: Array.from({ length: 12 }, (_, index) => ({
          id: `series-${index}`,
-          trackId: `frame-${Math.floor(index / 2)}`,
+          trackId: `frame-${Math.floor(index / 3)}`,
          name: `series ${index}`,
          data: {
            kind: 'points' as const,
@@ -67,9 +92,9 @@ describe('WaveformChart', () => {
    const wrapper = await mountSizedChart(
      {
        kind: 'series',
-        series: Array.from({ length: 4 }, (_, index) => ({
+        series: Array.from({ length: 6 }, (_, index) => ({
          id: `series-${index}`,
-          trackId: `frame-${Math.floor(index / 2)}`,
+          trackId: `frame-${Math.floor(index / 3)}`,
          name: `series ${index}`,
          data: {
            kind: 'points',
@@ -104,7 +129,7 @@ describe('WaveformChart', () => {
    })

    const items = wrapper.findAll('.waveform-chart__legend-item')
-    expect(items).toHaveLength(2)
+    expect(items).toHaveLength(3)
    expect(items.every((item) => item.attributes('disabled') !== undefined)).toBe(true)
    expect(wrapper.get('.waveform-legend__panel').classes()).not.toContain(
      'waveform-legend__panel--interactive',
@@ -120,7 +145,7 @@ describe('WaveformChart', () => {
      overlayMode: 'multi-axis',
    })

-    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(3)
    expect(wrapper.find('[data-annotation-id="high-note"]').exists()).toBe(true)
    const annotationLayer = wrapper.get('.waveform-annotation-layer').element
    const legendLayer = wrapper.get('.waveform-chart__legend-layer').element
@@ -135,8 +160,8 @@ describe('WaveformChart', () => {

    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
-    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(1)
+    ).toEqual(['low', 'mid'])
+    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(2)
    expect(wrapper.find('[data-annotation-id="high-note"]').exists()).toBe(false)
    expect(wrapper.findAll('.waveform-chart__legend-item')[1].classes()).toContain('is-hidden')
    expect(wrapper.findAll('.waveform-chart__legend-item')[1].attributes('aria-pressed')).toBe(
@@ -162,12 +187,12 @@ describe('WaveformChart', () => {
    )
    flushAnimationFrames()
    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__tooltip-series')).toHaveLength(1)
+    expect(wrapper.findAll('.waveform-chart__tooltip-series')).toHaveLength(2)
    expect(wrapper.get('.waveform-chart__tooltip-series').text()).toContain('低量程')

    await wrapper.findAll('.waveform-chart__legend-item')[1].trigger('click')
    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(3)
    expect(wrapper.find('[data-annotation-id="high-note"]').exists()).toBe(true)
    expect(wrapper.emitted('series-visibility-change')?.at(-1)).toEqual([
      { seriesId: 'high', visible: true, hiddenSeriesIds: [] },
@@ -183,20 +208,20 @@ describe('WaveformChart', () => {

    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
+    ).toEqual(['low', 'mid'])
    await wrapper.findAll('.waveform-chart__legend-item')[0].trigger('click')
    expect(wrapper.emitted('update:hidden-series-ids')?.at(-1)).toEqual([
      ['high', 'temporarily-absent', 'low'],
    ])
    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
+    ).toEqual(['low', 'mid'])

    await wrapper.setProps({ hiddenSeriesIds: ['low'] })
    await flushPromises()
    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['high'])
+    ).toEqual(['high', 'mid'])
  })

  it('retains uncontrolled visibility by stable ID and clears removed IDs', async () => {
@@ -215,7 +240,7 @@ describe('WaveformChart', () => {
    await flushPromises()
    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
+    ).toEqual(['mid', 'low'])

    await wrapper.setProps({
      data: {
@@ -226,12 +251,12 @@ describe('WaveformChart', () => {
    await flushPromises()
    await wrapper.setProps({ data: original })
    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(3)
  })

  it('keeps a recoverable legend and stops chart interaction when every series is hidden', async () => {
    const wrapper = await mountSizedChart(visibilitySeries(), {
-      defaultHiddenSeriesIds: ['low', 'high'],
+      defaultHiddenSeriesIds: ['low', 'high', 'mid'],
      grid: { rowCount: 1, columnCount: 1 },
      legend: { interactive: true },
      overlayMode: 'multi-axis',
@@ -240,7 +265,7 @@ describe('WaveformChart', () => {
    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(0)
    expect(wrapper.findAll('.waveform-chart__axis')).toHaveLength(0)
    expect(wrapper.findAll('.waveform-chart__overlay')).toHaveLength(0)
-    expect(wrapper.findAll('.waveform-chart__legend-item')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__legend-item')).toHaveLength(3)
    expect(wrapper.get('.waveform-track__no-visible-series').text()).toBe('暂无可见曲线')

    await wrapper.findAll('.waveform-chart__legend-item')[0].trigger('click')
@@ -273,7 +298,7 @@ describe('WaveformChart', () => {
    )
    flushAnimationFrames()
    await flushPromises()
-    expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(true)
+    expect(annotationEditorExists()).toBe(true)

    const controller = wrapper.getComponent(WaveformChartView).props('controller') as unknown as {
      annotationInteraction: { editorDraft: { value: { annotation: { seriesId: string } } | null } }
@@ -287,7 +312,7 @@ describe('WaveformChart', () => {
    expect(item).toBeDefined()
    await item!.trigger('click')
    await flushPromises()
-    expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(false)
+    expect(annotationEditorExists()).toBe(false)
  })

  it('renders independent cells with separate x axes and overlays', async () => {
--- a/src/components/waveformChartCases/multiAxisAndPagination.test.ts
+++ b/src/components/waveformChartCases/multiAxisAndPagination.test.ts
@@ -177,6 +177,18 @@ describe('WaveformChart', () => {
              ],
            },
          },
+          {
+            id: 'reference',
+            trackId: 'frame-1',
+            name: 'REF_CH_1',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 0.25 },
+                { x: 1, y: 1.25 },
+              ],
+            },
+          },
        ],
      },
      { frameNumber: 1, grid: { rowCount: 2, columnCount: 1 } },
@@ -186,7 +198,7 @@ describe('WaveformChart', () => {
    expect(tracks).toHaveLength(2)
    expect(
      tracks[0].findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['primary', 'comparison'])
+    ).toEqual(['primary', 'comparison', 'reference'])
    expect(
      tracks[1].findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
    ).toEqual(['second-frame'])
@@ -203,12 +215,13 @@ describe('WaveformChart', () => {
    expect(legend.findAll('.waveform-chart__legend-item').map((item) => item.text())).toEqual([
      'BT2_2M',
      'TEST_CH_1',
+      'REF_CH_1',
    ])
    expect(
      legend
        .findAll('.waveform-legend__swatch')
        .map((swatch) => swatch.get('path').attributes('stroke')),
-    ).toEqual(['#0960bd', '#389e0d'])
+    ).toEqual(['#0960bd', '#2ca02c', '#d62728'])
    expect(wrapper.findAll('.waveform-chart__watermark').map((item) => item.text())).toEqual([
      '1',
      '2',
@@ -232,10 +245,11 @@ describe('WaveformChart', () => {
    await flushPromises()

    const tooltipSeries = wrapper.findAll('.waveform-chart__tooltip-series')
-    expect(tooltipSeries).toHaveLength(2)
+    expect(tooltipSeries).toHaveLength(3)
    expect(tooltipSeries.map((item) => item.text())).toEqual([
      expect.stringContaining('BT2_2M'),
      expect.stringContaining('TEST_CH_1'),
+      expect.stringContaining('REF_CH_1'),
    ])
  })

@@ -268,6 +282,18 @@ describe('WaveformChart', () => {
              ],
            },
          },
+          {
+            id: 'third',
+            trackId: 'shared',
+            name: 'third',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 2 },
+                { x: 1, y: 3 },
+              ],
+            },
+          },
        ],
      },
      { grid: { rowCount: 1, columnCount: 1 } },
--- a/src/components/waveformChartCases/presentationMode.test.ts
+++ b/src/components/waveformChartCases/presentationMode.test.ts
@@ -5,6 +5,14 @@ import { flushAnimationFrames } from '../../test/setup'
 import { mountSizedChart } from '../../test/waveformChart'
 import type { WaveformData, WaveformDisplayMode } from '../data/types'

+function annotationEditorExists() {
+  return Boolean(
+    Array.from(document.body.querySelectorAll<HTMLElement>('[role="dialog"]'))
+      .filter((element) => element.closest('.waveform-annotation-editor'))
+      .at(-1),
+  )
+}
+
 const presentationData: WaveformData = {
  kind: 'series',
  series: [
@@ -34,6 +42,19 @@ const presentationData: WaveformData = {
        ],
      },
    },
+    {
+      id: 'mid',
+      trackId: 'shared',
+      name: '中量程',
+      data: {
+        kind: 'points',
+        points: [
+          { x: 0, y: 50 },
+          { x: 1, y: 100 },
+          { x: 2, y: 75 },
+        ],
+      },
+    },
    {
      id: 'other',
      name: '其他通道',
@@ -142,9 +163,9 @@ describe('WaveformChart presentation mode', () => {
          cancelable: true,
        }),
      )
-      wrapper.get('.waveform-chart__svg').element.dispatchEvent(
-        new MouseEvent('dblclick', { bubbles: true, cancelable: true }),
-      )
+      wrapper
+        .get('.waveform-chart__svg')
+        .element.dispatchEvent(new MouseEvent('dblclick', { bubbles: true, cancelable: true }))
      await wrapper.get('[data-annotation-id="note"]').trigger('contextmenu', {
        clientX: width / 2,
        clientY: height / 2,
@@ -282,13 +303,13 @@ describe('WaveformChart presentation mode', () => {
      }),
    )
    await flushPromises()
-    expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(true)
+    expect(annotationEditorExists()).toBe(true)

    await wrapper.setProps({ presentationMode: true })
    await flushPromises()

    expect(wrapper.find('.waveform-chart__tooltip').exists()).toBe(false)
-    expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(false)
+    expect(annotationEditorExists()).toBe(false)
    expect(wrapper.emitted('point-hover')?.at(-1)).toEqual([null])

    await wrapper.setProps({ presentationMode: false })
--- a/src/components/waveformChartCases/renderingStyles.test.ts
+++ b/src/components/waveformChartCases/renderingStyles.test.ts
@@ -181,7 +181,7 @@ describe('WaveformChart', () => {
    ])
    expect(stepSwatchPaths[0]?.attributes()).toMatchObject({
      d: 'M1 8H25',
-      stroke: '#389e0d',
+      stroke: '#2ca02c',
      'stroke-width': '1.5',
    })
    expect(stepSwatchPaths[1]?.attributes()).toMatchObject({
--- a/src/components/waveformChartCases/viewportConstraintsAndReset.test.ts
+++ b/src/components/waveformChartCases/viewportConstraintsAndReset.test.ts
@@ -308,69 +308,4 @@ describe('WaveformChart', () => {
    expect(wrapper.emitted('zoom-change')?.length ?? 0).toBe(eventCount + 1)
    expect(zoomedOutDomain).toEqual([0, 2])
  })
-
-  it('resets a shared viewport on double-click and emits zoom-reset', async () => {
-    const wrapper = await mountSizedChart({
-      kind: 'points',
-      points: [
-        { x: 0, y: 0 },
-        { x: 2, y: 1 },
-      ],
-    })
-    const overlay = wrapper.get('.waveform-chart__overlay')
-    const width = Number(overlay.attributes('width'))
-    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
-      value: () => ({ left: 0, top: 0, width, height: 290 }),
-    })
-    overlay.element.dispatchEvent(
-      new WheelEvent('wheel', {
-        deltaY: -4000,
-        clientX: width / 2,
-        clientY: 145,
-        bubbles: true,
-        cancelable: true,
-      }),
-    )
-    flushAnimationFrames()
-    await flushPromises()
-    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).not.toBe('0')
-
-    overlay.element.dispatchEvent(new MouseEvent('dblclick', { bubbles: true, cancelable: true }))
-    await flushPromises()
-
-    expect(wrapper.emitted('zoom-reset')).toHaveLength(1)
-    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
-    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('2000')
-  })
-
-  it('exposes resetViewport for independent tracks', async () => {
-    const wrapper = await mountSizedChart(gridSeries(2), {
-      displayMode: 'independent',
-      grid: { rowCount: 1, columnCount: 2 },
-    })
-    const overlay = wrapper.findAll('.waveform-chart__overlay--independent')[0]
-    const width = Number(overlay.attributes('width'))
-    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
-      value: () => ({ left: 0, top: 0, width, height: 260 }),
-    })
-    overlay.element.dispatchEvent(
-      new WheelEvent('wheel', {
-        deltaY: -4000,
-        clientX: width / 2,
-        clientY: 130,
-        bubbles: true,
-        cancelable: true,
-      }),
-    )
-    flushAnimationFrames()
-    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__axis-endpoint--start')[0].text()).not.toBe('0')
-
-    const chart = wrapper.vm as unknown as { resetViewport: () => void }
-    chart.resetViewport()
-    await flushPromises()
-
-    expect(wrapper.findAll('.waveform-chart__axis-endpoint--start')[0].text()).toBe('0')
-    expect(wrapper.findAll('.waveform-chart__axis-endpoint--end')[0].text()).toBe('1000')
-  })
 })
--- a/src/components/waveformChartCases/viewportReset.test.ts
+++ b/src/components/waveformChartCases/viewportReset.test.ts
@@ -0,0 +1,149 @@
+import { flushPromises } from '@vue/test-utils'
+import { describe, expect, it } from 'vitest'
+
+import { flushAnimationFrames } from '../../test/setup'
+import { gridSeries, mountSizedChart } from '../../test/waveformChart'
+
+describe('WaveformChart viewport reset', () => {
+  const niceExplicitStrategy = {
+    type: 'nice' as const,
+    bounds: 'end' as const,
+    tickCount: 10,
+    includeExplicit: true,
+  }
+
+  it('resets a shared viewport on double-click and emits a global payload', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 2, y: 1 },
+        ],
+      },
+      { displayMode: 'separated' },
+    )
+    const overlay = wrapper.get('.waveform-chart__overlay')
+    const width = Number(overlay.attributes('width'))
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width, height: 290 }),
+    })
+    overlay.element.dispatchEvent(
+      new WheelEvent('wheel', {
+        deltaY: -4000,
+        clientX: width / 2,
+        clientY: 145,
+        bubbles: true,
+        cancelable: true,
+      }),
+    )
+    flushAnimationFrames()
+    await flushPromises()
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).not.toBe('0')
+
+    overlay.element.dispatchEvent(new MouseEvent('dblclick', { bubbles: true, cancelable: true }))
+    await flushPromises()
+
+    expect(wrapper.emitted('zoom-reset')).toEqual([[{}]])
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('2000')
+  })
+
+  it('resets only the double-clicked independent track and identifies it', async () => {
+    const wrapper = await mountSizedChart(gridSeries(2), {
+      displayMode: 'independent',
+      grid: { rowCount: 1, columnCount: 2 },
+    })
+    const overlays = wrapper.findAll('.waveform-chart__overlay--independent')
+    for (const overlay of overlays) {
+      const width = Number(overlay.attributes('width'))
+      Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+        value: () => ({ left: 0, top: 0, width, height: 260 }),
+      })
+      overlay.element.dispatchEvent(
+        new WheelEvent('wheel', {
+          deltaY: -4000,
+          clientX: width / 2,
+          clientY: 130,
+          bubbles: true,
+          cancelable: true,
+        }),
+      )
+      flushAnimationFrames()
+      await flushPromises()
+    }
+    const startsBeforeReset = wrapper.findAll('.waveform-chart__axis-endpoint--start')
+    expect(startsBeforeReset[0].text()).not.toBe('0')
+    expect(startsBeforeReset[1].text()).not.toBe('0')
+    const secondTrackStart = startsBeforeReset[1].text()
+
+    overlays[0].element.dispatchEvent(
+      new MouseEvent('dblclick', { bubbles: true, cancelable: true }),
+    )
+    await flushPromises()
+
+    const startsAfterReset = wrapper.findAll('.waveform-chart__axis-endpoint--start')
+    expect(startsAfterReset[0].text()).toBe('0')
+    expect(startsAfterReset[1].text()).toBe(secondTrackStart)
+    expect(wrapper.emitted('zoom-reset')).toEqual([[{ trackIndex: 0, seriesIds: ['channel-0'] }]])
+  })
+
+  it('keeps the exposed no-argument resetViewport global', async () => {
+    const wrapper = await mountSizedChart(gridSeries(2), {
+      displayMode: 'independent',
+      grid: { rowCount: 1, columnCount: 2 },
+    })
+    const overlay = wrapper.findAll('.waveform-chart__overlay--independent')[0]
+    const width = Number(overlay.attributes('width'))
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width, height: 260 }),
+    })
+    overlay.element.dispatchEvent(
+      new WheelEvent('wheel', {
+        deltaY: -4000,
+        clientX: width / 2,
+        clientY: 130,
+        bubbles: true,
+        cancelable: true,
+      }),
+    )
+    flushAnimationFrames()
+    await flushPromises()
+    expect(wrapper.findAll('.waveform-chart__axis-endpoint--start')[0].text()).not.toBe('0')
+
+    const chart = wrapper.vm as unknown as { resetViewport: () => void }
+    chart.resetViewport()
+    await flushPromises()
+
+    expect(wrapper.findAll('.waveform-chart__axis-endpoint--start')[0].text()).toBe('0')
+    expect(wrapper.findAll('.waveform-chart__axis-endpoint--end')[0].text()).toBe('1000')
+  })
+
+  it('resets shared and independent explicit domains to their included nice bounds', async () => {
+    const shared = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 4.999999, y: 1 },
+        ],
+      },
+      { initialXDomain: [0, 4.999999], xDomainStrategy: niceExplicitStrategy },
+    )
+    const independent = await mountSizedChart(gridSeries(2), {
+      displayMode: 'independent',
+      initialXDomains: { 'channel-0': [0, 4.999999] },
+      xDomainStrategy: niceExplicitStrategy,
+    })
+
+    ;(shared.vm as unknown as { resetViewport: () => void }).resetViewport()
+    ;(independent.vm as unknown as { resetViewport: () => void }).resetViewport()
+    await flushPromises()
+
+    expect(shared.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(shared.get('.waveform-chart__axis-endpoint--end').text()).toBe('5000')
+    const firstTrack = independent.findAll('.waveform-chart__track')[0]
+    expect(firstTrack.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(firstTrack.get('.waveform-chart__axis-endpoint--end').text()).toBe('5000')
+  })
+})
--- a/src/components/waveformChartCases/xDomainStrategy.test.ts
+++ b/src/components/waveformChartCases/xDomainStrategy.test.ts
@@ -0,0 +1,156 @@
+import { describe, expect, it } from 'vitest'
+
+import { gridSeries, mountSizedChart } from '../../test/waveformChart'
+
+describe('WaveformChart x domain strategy', () => {
+  it('expands automatic x domains without changing source seconds', async () => {
+    const data = {
+      kind: 'points' as const,
+      points: [
+        { x: 0, y: 0 },
+        { x: 4.999999, y: 1 },
+      ],
+    }
+    const wrapper = await mountSizedChart(data, {
+      timeUnit: 'ms',
+      xDomainStrategy: { type: 'nice', bounds: 'end' },
+    })
+
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('5000')
+    expect(data.points[1]?.x).toBe(4.999999)
+  })
+
+  it('keeps explicit initial x domains exact by default', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 123, y: 0 },
+          { x: 456, y: 1 },
+        ],
+      },
+      {
+        timeUnit: 's',
+        initialXDomain: [120, 460],
+        xDomainStrategy: { type: 'nice' },
+      },
+    )
+
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('120')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('460')
+  })
+
+  it('keeps explicit per-track initial x domains exact by default', async () => {
+    const wrapper = await mountSizedChart(gridSeries(1), {
+      displayMode: 'independent',
+      initialXDomains: { 'channel-0': [0, 4.999999] },
+      xDomainStrategy: { type: 'nice', bounds: 'end' },
+    })
+
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('4999.999')
+  })
+
+  it('includes an explicit shared initial x domain when requested', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 4.999999, y: 1 },
+        ],
+      },
+      {
+        initialXDomain: [0, 4.999999],
+        xDomainStrategy: {
+          type: 'nice',
+          bounds: 'end',
+          tickCount: 10,
+          includeExplicit: true,
+        },
+      },
+    )
+
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('5000')
+  })
+
+  it('includes explicit per-track initial x domains in independent mode', async () => {
+    const wrapper = await mountSizedChart(gridSeries(2), {
+      displayMode: 'independent',
+      grid: { rowCount: 1, columnCount: 2 },
+      initialXDomains: {
+        'channel-0': [0, 4.999999],
+        'channel-1': [10, 14.999999],
+      },
+      xDomainStrategy: { type: 'nice', bounds: 'end', tickCount: 10, includeExplicit: true },
+    })
+
+    const tracks = wrapper.findAll('.waveform-chart__track')
+    expect(tracks[0]?.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(tracks[0]?.get('.waveform-chart__axis-endpoint--end').text()).toBe('5000')
+    expect(tracks[1]?.get('.waveform-chart__axis-endpoint--start').text()).toBe('10000')
+    expect(tracks[1]?.get('.waveform-chart__axis-endpoint--end').text()).toBe('15000')
+  })
+
+  it('keeps an explicit viewport wider than the data and leaves uncovered time blank', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 10, y: 1 },
+        ],
+      },
+      { timeUnit: 's', initialXDomain: [-5, 20] },
+    )
+
+    const track = wrapper.get('.waveform-chart__track')
+    const width = Number(track.attributes('data-track-width'))
+    const path = track.get('.waveform-chart__line').attributes('d') ?? ''
+    const xCoordinates = Array.from(path.matchAll(/(?:M|L)([\d.-]+)/g)).map((match) =>
+      Number(match[1]),
+    )
+
+    expect(track.get('.waveform-chart__axis-endpoint--start').text()).toBe('-5')
+    expect(track.get('.waveform-chart__axis-endpoint--end').text()).toBe('20')
+    expect(xCoordinates.length).toBeGreaterThan(0)
+    expect(Math.min(...xCoordinates)).toBeGreaterThanOrEqual(0)
+    expect(Math.max(...xCoordinates)).toBeLessThanOrEqual(width)
+  })
+
+  it('applies independent explicit viewports per track, including empty time regions', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'series',
+        series: [
+          {
+            id: 'first',
+            name: '第一轨',
+            data: { kind: 'points', points: [{ x: 0, y: 0 }, { x: 10, y: 1 }] },
+          },
+          {
+            id: 'second',
+            name: '第二轨',
+            data: { kind: 'points', points: [{ x: 100, y: 0 }, { x: 110, y: 1 }] },
+          },
+        ],
+      },
+      {
+        displayMode: 'independent',
+        grid: { rowCount: 1, columnCount: 2 },
+        timeUnit: 's',
+        initialXDomains: { first: [-5, 20], second: [95, 120] },
+      },
+    )
+
+    const tracks = wrapper.findAll('.waveform-chart__track')
+    expect(tracks[0]?.get('.waveform-chart__axis-endpoint--start').text()).toBe('-5')
+    expect(tracks[0]?.get('.waveform-chart__axis-endpoint--end').text()).toBe('20')
+    expect(tracks[1]?.get('.waveform-chart__axis-endpoint--start').text()).toBe('95')
+    expect(tracks[1]?.get('.waveform-chart__axis-endpoint--end').text()).toBe('120')
+    expect(tracks[0]?.find('.waveform-chart__line').exists()).toBe(true)
+    expect(tracks[1]?.find('.waveform-chart__line').exists()).toBe(true)
+  })
+})
--- a/src/core/data.test.ts
+++ b/src/core/data.test.ts
@@ -102,4 +102,26 @@ describe('waveform data normalization', () => {
      'solid',
    ])
  })
+
+  it('preserves trimmed shot numbers and omits blank values', () => {
+    const result = normalizeWaveformSeries({
+      kind: 'series',
+      series: [
+        {
+          id: 'with-shot',
+          shotNo: '  13300  ',
+          name: '通道 A',
+          data: { kind: 'points', points: [{ x: 0, y: 1 }] },
+        },
+        {
+          id: 'without-shot',
+          shotNo: '   ',
+          name: '通道 B',
+          data: { kind: 'points', points: [{ x: 0, y: 2 }] },
+        },
+      ],
+    })
+
+    expect(result.map((series) => series.shotNo)).toEqual(['13300', undefined])
+  })
 })
--- a/src/core/data.ts
+++ b/src/core/data.ts
@@ -132,6 +132,7 @@ export function normalizeWaveformSeries(data: WaveformData): NormalizedWaveformS

      return {
        id: uniqueId,
+        shotNo: series.shotNo?.trim() || undefined,
        trackId: series.trackId?.trim() || undefined,
        name: series.name,
        unit: series.unit,
--- a/src/data/simulatedWaveforms.test.ts
+++ b/src/data/simulatedWaveforms.test.ts
@@ -3,7 +3,7 @@ import { describe, expect, it } from 'vitest'
 import { createSimulatedWaveformData } from './simulatedWaveforms'

 describe('simulated waveform data', () => {
-  it('creates deterministic, finite six-channel data', () => {
+  it('creates deterministic, finite seven-channel data with a two-series second frame', () => {
    const first = createSimulatedWaveformData()
    const second = createSimulatedWaveformData()

@@ -11,8 +11,13 @@ describe('simulated waveform data', () => {
    expect(first.kind).toBe('series')
    if (first.kind !== 'series') return

-    expect(first.series).toHaveLength(6)
-    expect(new Set(first.series.map((series) => series.id)).size).toBe(6)
+    expect(first.series).toHaveLength(7)
+    expect(new Set(first.series.map((series) => series.id)).size).toBe(7)
+    const secondFrame = first.series.filter(
+      (series) => series.trackId === 'simulated-harmonic-frame',
+    )
+    expect(secondFrame).toHaveLength(2)
+    expect(new Set(first.series.map((series) => series.shotNo))).toEqual(new Set(['13300']))
    first.series.forEach((series) => {
      expect(series.data.kind).toBe('points')
      if (series.data.kind !== 'points') return
--- a/src/data/simulatedWaveforms.ts
+++ b/src/data/simulatedWaveforms.ts
@@ -13,7 +13,7 @@ type ErrorGenerator = (

 interface SimulatedSeriesDefinition extends Pick<
  WaveformSeries,
-  'id' | 'name' | 'unit' | 'lineType' | 'pointType' | 'errorBar'
+  'id' | 'trackId' | 'shotNo' | 'name' | 'unit' | 'color' | 'lineType' | 'pointType' | 'errorBar'
 > {
  signal: SignalGenerator
  errors?: ErrorGenerator
@@ -46,6 +46,7 @@ function createPoints(
 const seriesDefinitions: SimulatedSeriesDefinition[] = [
  {
    id: 'simulated-sine',
+    shotNo: '13300',
    name: '正弦基波',
    unit: 'V',
    lineType: 'none',
@@ -59,6 +60,8 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
  },
  {
    id: 'simulated-harmonic',
+    trackId: 'simulated-harmonic-frame',
+    shotNo: '13300',
    name: '谐波扰动',
    unit: 'V',
    lineType: 'linear',
@@ -66,8 +69,21 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
    signal: (time) =>
      0.9 * Math.sin(TWO_PI * 0.55 * time) + 0.28 * Math.sin(TWO_PI * 2.2 * time + 0.4),
  },
+  {
+    id: 'simulated-harmonic-reference',
+    trackId: 'simulated-harmonic-frame',
+    shotNo: '13300',
+    name: '谐波对比',
+    unit: 'V',
+    color: '#2ca02c',
+    lineType: 'linear',
+    pointType: 'none',
+    signal: (time) =>
+      0.62 * Math.sin(TWO_PI * 0.55 * time + 0.55) + 0.18 * Math.sin(TWO_PI * 2.2 * time - 0.2),
+  },
  {
    id: 'simulated-damped',
+    shotNo: '13300',
    name: '阻尼振荡',
    unit: 'A',
    lineType: 'linear',
@@ -79,6 +95,7 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
  },
  {
    id: 'simulated-step',
+    shotNo: '13300',
    name: '阶跃响应',
    unit: 'V',
    lineType: 'linear',
@@ -87,6 +104,7 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
  },
  {
    id: 'simulated-pulse',
+    shotNo: '13300',
    name: '脉冲响应',
    unit: 'V',
    lineType: 'linear',
@@ -95,6 +113,7 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
  },
  {
    id: 'simulated-noise',
+    shotNo: '13300',
    name: '带噪信号',
    unit: 'A',
    lineType: 'linear',
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,7 +13,9 @@ export type {
  WaveformDisplayMode,
  WaveformOverlayMode,
  WaveformInteractionMode,
+  WaveformXDomainStrategy,
  WaveformZoomEndPayload,
+  WaveformZoomResetPayload,
  WaveformAnnotationStyle,
  WaveformAnnotation,
  WaveformRenderingOptions,
--- a/src/test/waveformChart.ts
+++ b/src/test/waveformChart.ts
@@ -58,6 +58,18 @@ export function visibilitySeries(): WaveformData {
          ],
        },
      },
+      {
+        id: 'mid',
+        trackId: 'shared-frame',
+        name: '中量程',
+        data: {
+          kind: 'points',
+          points: [
+            { x: 0, y: 100 },
+            { x: 1, y: 200 },
+          ],
+        },
+      },
    ],
  }
 }
--- a/src/types/chart.ts
+++ b/src/types/chart.ts
@@ -26,6 +26,17 @@ export type WaveformOverlayMode = 'single-axis' | 'multi-axis'
 /** 标注工具模式 */
 export type WaveformInteractionMode = 'zoom' | 'annotation'

+/** Controls how the initial X viewport is derived when no explicit domain is configured. */
+export interface WaveformXDomainStrategy {
+  type: 'data' | 'nice'
+  /** Selects which bounds are expanded when type is `nice`. Defaults to `both`. */
+  bounds?: 'both' | 'end'
+  /** Stable tick count used to calculate nice bounds. Defaults to 10. */
+  tickCount?: number
+  /** Applies the strategy to explicit initial domains. Defaults to false. */
+  includeExplicit?: boolean
+}
+
 /** Describes the X-axis viewport after a zoom gesture completes. */
 export interface WaveformZoomEndPayload {
  start: number
@@ -38,6 +49,12 @@ export interface WaveformZoomEndPayload {
  gesture?: 'wheel' | 'box'
 }

+/** Identifies the viewport reset by a double-click gesture. */
+export interface WaveformZoomResetPayload {
+  trackIndex?: number
+  seriesIds?: string[]
+}
+
 /** 标注颜色样式 */
 export interface WaveformAnnotationStyle {
  borderColor?: string
--- a/src/types/data.ts
+++ b/src/types/data.ts
@@ -47,6 +47,8 @@ export type SingleWaveformData =
 */
 export interface WaveformSeries {
  id?: string
+  /** 炮号，未提供时 Tooltip 显示“未配置炮号”。 */
+  shotNo?: string
  /** 相同 trackId 的系列叠加在同一图框中；默认每个系列独占一个图框。 */
  trackId?: string
  name: string
@@ -74,6 +76,7 @@ export type WaveformData =
 */
 export interface NormalizedWaveformSeries {
  id: string
+  shotNo?: string
  trackId?: string
  name: string
  unit?: string
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -8,7 +8,9 @@ export type {
  WaveformDisplayMode,
  WaveformOverlayMode,
  WaveformInteractionMode,
+  WaveformXDomainStrategy,
  WaveformZoomEndPayload,
+  WaveformZoomResetPayload,
  WaveformAnnotationStyle,
  WaveformAnnotation,
  WaveformRenderingOptions,
--- a/src/views/FixedYDomainDemo.vue
+++ b/src/views/FixedYDomainDemo.vue
@@ -19,6 +19,7 @@ const chartData: WaveformData = {
  series: [
    {
      id: 'voltage',
+      shotNo: '13300',
      name: '电压',
      unit: 'V',
      color: '#1677ff',
@@ -33,6 +34,7 @@ const chartData: WaveformData = {
    },
    {
      id: 'current',
+      shotNo: '13300',
      name: '电流',
      unit: 'mA',
      color: '#d4380d',
Author	SHA1	Message	Date
李启源	7a6a7e5c26	feat(data): 扩展示例波形数据与测试覆盖 All checks were successful Package component / package (push) Successful in 4m26s Details 新增示例谐波对比数据，完善图例、多轴和演示测试，并同步文档说明。	2026-08-17 14:34:15 +08:00
李启源	dda87f7508	feat(annotation): 优化标注编辑与交互体验 All checks were successful Package component / package (push) Successful in 4m23s Details 标注编辑器支持时间输入与采样点吸附，完善标注交互、默认配色和示例图框样式。	2026-08-17 12:16:12 +08:00
李启源	3692e21dbc	feat(chart): 增加炮号并优化 Tooltip 展示 All checks were successful Package component / package (push) Successful in 4m5s Details 新增 WaveformSeries.shotNo 字段，Tooltip 展示炮号及坐标信息，并同步示例与测试。	2026-08-17 10:14:44 +08:00
李启源	54477ecbbd	fix(ci): checkout release archive without git pack All checks were successful Package component / package (push) Successful in 6m22s Details	2026-08-13 22:03:57 +08:00
李启源	d349220395	fix(ci): avoid shallow tag pack checkout Some checks failed Package component / package (push) Failing after 2s Details	2026-08-13 21:56:58 +08:00
李启源	81f36bde71	feat(chart): support explicit nice x domains Some checks failed Package component / package (push) Failing after 3s Details	2026-08-13 21:51:49 +08:00
李启源	e940e0af1d	chore(release): prepare v0.1.32 All checks were successful Package component / package (push) Successful in 5m58s Details	2026-08-11 15:29:41 +08:00
李启源	3d6c5156c0	fix(chart): scope independent viewport resets	2026-08-11 15:29:32 +08:00
李启源	d667350219	docs: update repository guidelines	2026-08-10 16:56:21 +08:00