From 2cabe7e4fdd9764d10090ca6c946c1bcd86f4fc1 Mon Sep 17 00:00:00 2001
From: admin <572701190@qq.com>
Date: Sat, 2 May 2026 05:10:39 +0800
Subject: [PATCH] Preserve frame position order for auto insertion

- Allow system frame position percentages to keep two decimal places without reordering saved values.

- Stop frontend and backend settings normalization from sorting framePositions on load or save.

- Capture automatic video frames in timeline order while retaining each configured position index.

- Insert automatically selected frames into report placeholders according to the configured percentage order.

- Add frame position utilities and unit coverage for two-decimal rounding, clamping, order preservation, and timeline capture planning.

- Update README, AGENTS, feature, requirement, report editor, system settings, progress, and testing docs for the new frame ordering behavior.
---
 AGENTS.md                               |  1 +
 README.md                               |  1 +
 docs/features.md                        |  2 +-
 docs/modules/report-editor.md           |  2 +-
 docs/modules/system-settings.md         |  4 +-
 docs/progress.md                        |  1 +
 docs/requirements.md                    |  2 +-
 docs/testing.md                         |  1 +
 server/src/settings/settings.service.ts |  3 +-
 src/pages/ReportEditor.tsx              | 68 ++++++++++++++-----------
 src/pages/SystemSettings.tsx            | 35 ++++++-------
 src/utils/framePositions.test.ts        | 20 ++++++++
 src/utils/framePositions.ts             | 21 ++++++++
 13 files changed, 106 insertions(+), 55 deletions(-)
 create mode 100644 src/utils/framePositions.test.ts
 create mode 100644 src/utils/framePositions.ts

diff --git a/AGENTS.md b/AGENTS.md
index 91588f6..48ff7d9 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -352,6 +352,7 @@ PostgreSQL 数据模型。当前覆盖 `Tenant`、`Department`、`User`、`UserS
 - 模板列表合并工具，防止新增模板被旧 `localStorage.templates` 覆盖
 - 模板导入导出工具，覆盖 HTML 模板包生成、字段库元数据回导和旧 JSON 导入兼容
 - AI 区域扫描工具，覆盖从报告正文 HTML 识别 `.ai-region`
+- 抽帧百分比工具，覆盖两位小数保序和按时间顺序截图计划
 - 后端用户 DTO 和部门模板授权映射
 - 后端系统设置 schema 校验
 - 后端 AI 入参和讯飞语音代理帧处理
diff --git a/README.md b/README.md
index 9ced97e..5aae952 100644
--- a/README.md
+++ b/README.md
@@ -202,6 +202,7 @@ cp .env.example .env.local
 - 默认报告模板结构和字段配置。
 - 模板 HTML 导出包字段库元数据。
 - AI 区域扫描和报告编辑器加载后同步。
+- 抽帧百分比两位小数、保序和按时间截图计划。
 - 打印导出入口。
 - 后端权限策略、AI 入参和语音代理帧处理。
 
diff --git a/docs/features.md b/docs/features.md
index bd39449..21130d9 100644
--- a/docs/features.md
+++ b/docs/features.md
@@ -39,7 +39,7 @@
 | 部门模板授权 | 真实集成 | 后端提供 `/api/departments` 和 `/api/departments/:id/template-permissions`，超级管理员可通过管理员模板权限更新部门授权。 |
 | 电子签名 | 真实集成 | 用户管理页上传后压缩为 Data URL，再调用 `/api/users/:id/signature` 写入后端文件资源；报告中有对应绑定字段时通过受控文件 URL 展示。只有开发/显式回退模式下 API 不可用才保留本地签名回退。 |
 | 视频上传 | 真实集成 | 使用浏览器 File API 和对象 URL即时预览，并优先通过 `/api/files` 以 `kind = VIDEO` 写入后端文件资源。 |
-| 自动抽帧 | 真实集成 | 使用 `<video>` + `<canvas>` 按百分比截取 JPEG，关键帧优先通过 `/api/files` 以 `kind = FRAME` 写入后端文件资源。 |
+| 自动抽帧 | 真实集成 | 使用 `<video>` + `<canvas>` 按百分比截取 JPEG，关键帧优先通过 `/api/files` 以 `kind = FRAME` 写入后端文件资源；百分比支持两位小数并保留配置顺序，实际截图按时间顺序执行，自动插入按配置顺序执行。 |
 | 关键帧插入 | 真实集成 | 关键帧可点击插入或拖入图片占位符；上传成功后编辑器会把插入图片从 Data URL 替换为受控文件 URL。 |
 | AI 辅助撰写 | 真实集成 | 前端调用 `/api/ai/chat`，后端使用全局共用 Provider Key 代理 OpenAI 兼容 `/chat/completions`；AI 可编辑区域插入后会立即同步到目标下拉栏；需要有效 Provider 配置、模型和网络。 |
 | AI 差异确认 | 真实可用 | 使用 `diff` 生成左右差异，确认后写入 AI 区域。 |
diff --git a/docs/modules/report-editor.md b/docs/modules/report-editor.md
index 3e16fec..49a5f53 100644
--- a/docs/modules/report-editor.md
+++ b/docs/modules/report-editor.md
@@ -52,7 +52,7 @@
 
 ## 视频与抽帧
 
-用户上传视频后，系统使用浏览器对象 URL 进行即时预览，同时优先通过 `POST /api/files` 以 `kind = VIDEO` 上传后端文件资源。抽帧逻辑按系统设置中的 `framePositions` 百分比定位视频时间，绘制到 canvas 后转为 JPEG，并优先以 `kind = FRAME` 上传后端文件资源。
+用户上传视频后，系统使用浏览器对象 URL 进行即时预览，同时优先通过 `POST /api/files` 以 `kind = VIDEO` 上传后端文件资源。抽帧逻辑按系统设置中的 `framePositions` 百分比定位视频时间，绘制到 canvas 后转为 JPEG，并优先以 `kind = FRAME` 上传后端文件资源。实际截图会按视频时间从早到晚执行和展示；自动插入报告图片占位符时按系统设置中的百分比配置顺序插入。
 
 支持：
 
diff --git a/docs/modules/system-settings.md b/docs/modules/system-settings.md
index c570788..dc0dc4c 100644
--- a/docs/modules/system-settings.md
+++ b/docs/modules/system-settings.md
@@ -19,13 +19,13 @@
 配置字段包括：
 
 - `frameCount`：抽取帧数。
-- `framePositions`：每帧对应的视频进度百分比。
+- `framePositions`：每帧对应的视频进度百分比，支持保留两位小数，并保留管理员配置顺序。
 - `frameMode`：调整帧数时使用整体均匀抽取或保持当前抽帧。
 - `autoInsertFrames`：是否自动插入关键帧。
 - `autoInsertDelay`：自动插入延迟。
 - `autoInsertFrameIndices`：哪些抽帧序号参与自动插入。
 
-保存时会对 `framePositions` 排序，并把 `frameCount` 同步为位置数组长度。
+保存时不会对 `framePositions` 排序，只会把每个百分比规范到 0-100 区间和两位小数，并把 `frameCount` 同步为位置数组长度。报告编辑器自动截帧时会按时间顺序执行实际截图；自动插入图片时按 `framePositions` 的配置顺序和 `autoInsertFrameIndices` 插入。
 
 ## AI 接口配置
 
diff --git a/docs/progress.md b/docs/progress.md
index e5e6f1e..db5cf2b 100644
--- a/docs/progress.md
+++ b/docs/progress.md
@@ -90,3 +90,4 @@
 | 2026-05-02 | 移除前端用户可见 JSON 导出入口，保留模板历史 JSON 导入兼容。 |
 | 2026-05-02 | 模板 HTML 导出包补充模板字段和字段管理设置，导入时恢复字段库元数据。 |
 | 2026-05-02 | 修复报告编辑器加载已有 AI 区域后下拉栏初始显示“无可用 AI 区域”的问题。 |
+| 2026-05-02 | 调整抽帧百分比为两位小数保序保存；自动截图按时间顺序执行，自动插入按配置顺序执行。 |
diff --git a/docs/requirements.md b/docs/requirements.md
index 260e4c5..c6096af 100644
--- a/docs/requirements.md
+++ b/docs/requirements.md
@@ -60,7 +60,7 @@
 
 ### 系统设置
 
-- 超级管理员可配置抽帧数量、抽帧百分比、抽帧计算模式和自动插入策略。
+- 超级管理员可配置抽帧数量、两位小数抽帧百分比、抽帧计算模式和自动插入策略；百分比配置顺序用于自动插入顺序。
 - 超级管理员可配置 AI 服务商、接口地址、API Key 和模型名。
 - 超级管理员可配置讯飞语音听写参数。
 - 所有角色可设置默认报告模板。
diff --git a/docs/testing.md b/docs/testing.md
index ab83c26..e06d7b4 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -80,6 +80,7 @@ AI 第三方接口、讯飞语音上游 WebSocket、麦克风权限和真实视
 | 模板权限和个人模板 | 已覆盖 | `permissions.test.ts` |
 | 本地存储读写与容错 | 已覆盖 | `storage.test.ts` |
 | 系统设置混淆兼容 | 已覆盖 | `storage.test.ts` |
+| 抽帧百分比工具 | 已覆盖 | `framePositions.test.ts`，覆盖两位小数、保序和按时间生成截图计划。 |
 | 默认报告模板结构 | 已覆盖 | `defaultContent.test.ts` |
 | 默认字段和 AI Provider | 已覆盖 | `defaultContent.test.ts` |
 | AI 区域扫描工具 | 已覆盖 | `aiRegions.test.ts`，覆盖从编辑器 HTML 识别 `.ai-region` 和标题。 |
diff --git a/server/src/settings/settings.service.ts b/server/src/settings/settings.service.ts
index 555bf9c..22e7b64 100644
--- a/server/src/settings/settings.service.ts
+++ b/server/src/settings/settings.service.ts
@@ -272,8 +272,7 @@ export class SettingsService {
       ...(input.aiProviders || {}),
     };
     const framePositions = [...(input.framePositions || DEFAULT_SETTINGS.framePositions)]
-      .map((value) => Math.round(value * 10) / 10)
-      .sort((a, b) => a - b);
+      .map((value) => Math.round(value * 100) / 100);
 
     return {
       ...DEFAULT_SETTINGS,
diff --git a/src/pages/ReportEditor.tsx b/src/pages/ReportEditor.tsx
index f32b940..a8a7c54 100644
--- a/src/pages/ReportEditor.tsx
+++ b/src/pages/ReportEditor.tsx
@@ -24,6 +24,7 @@ import { listFiles, uploadFileResource } from '../api/files';
 import { isLocalFallbackEnabled } from '../config/runtime';
 import { diffChars } from 'diff';
 import { areAiRegionOptionsEqual, getAiRegionOptions, type AiRegionOption } from '../utils/aiRegions';
+import { buildFrameCaptureJobs, DEFAULT_FRAME_POSITIONS, normalizeFramePositions } from '../utils/framePositions';
 
 type AudioWindow = Window & typeof globalThis & {
   webkitAudioContext?: typeof AudioContext;
@@ -992,12 +993,39 @@ export default function ReportEditor() {
     saveDraftToStorage();
   };
 
+  const insertFrameIntoNextPlaceholder = (frame: CapturedFrame) => {
+    if (!editorRef.current) return false;
+    const emptyPlaceholder = editorRef.current.querySelector('.image-placeholder:not(.has-image):not([data-mode="manual"])') as HTMLElement | null;
+    if (!emptyPlaceholder) return false;
+    emptyPlaceholder.innerHTML = `
+      <span class="delete-btn" contenteditable="false">×</span>
+      <img src="${frame.dataUrl}" style="max-width:${emptyPlaceholder.style.maxWidth || emptyPlaceholder.style.width || '200px'};max-height:${emptyPlaceholder.style.maxHeight || emptyPlaceholder.style.height || '200px'};display:block;object-fit:contain;object-position:left top;" draggable="false">
+    `;
+    emptyPlaceholder.classList.add('has-image');
+    emptyPlaceholder.style.border = 'none';
+    emptyPlaceholder.style.background = 'transparent';
+    emptyPlaceholder.style.width = 'auto';
+    emptyPlaceholder.style.height = 'auto';
+    emptyPlaceholder.style.lineHeight = 'normal';
+    emptyPlaceholder.style.maxWidth = emptyPlaceholder.style.maxWidth || emptyPlaceholder.style.width || '200px';
+    emptyPlaceholder.style.maxHeight = emptyPlaceholder.style.maxHeight || emptyPlaceholder.style.height || '200px';
+    emptyPlaceholder.style.textAlign = 'left';
+    emptyPlaceholder.style.verticalAlign = 'top';
+    emptyPlaceholder.style.justifyContent = 'flex-start';
+    emptyPlaceholder.style.alignItems = 'flex-start';
+    contentRef.current = editorRef.current.innerHTML;
+    saveDraftToStorage();
+    return true;
+  };
+
   const autoCaptureFrames = async () => {
     if (!videoRef.current || currentVideoIndex === -1) return;
     const video = videoRef.current;
     const settings = storage.get<SystemSettings>('systemSettings', {} as SystemSettings);
-    const positions = settings.framePositions || [7.9, 9.3, 46.2, 49.1, 63.9, 64.8, 68.8, 73.7, 80.2, 85.0, 96.3, 98.6];
+    const positions = normalizeFramePositions(settings.framePositions, DEFAULT_FRAME_POSITIONS);
     const dur = video.duration || 1;
+    const captureJobs = buildFrameCaptureJobs(positions, dur);
+    const capturedByPositionIndex = new Map<number, CapturedFrame>();
 
     const canvas = canvasRef.current;
     if (!canvas) return;
@@ -1008,9 +1036,8 @@ export default function ReportEditor() {
     if (wasPlaying) video.pause();
 
     let accumulatedFrames = [...capturedFrames];
-    for (let i = 0; i < positions.length; i++) {
-      const pos = positions[i];
-      const time = (pos / 100) * dur;
+    for (const job of captureJobs) {
+      const time = job.time;
       video.currentTime = time;
       await new Promise<void>(resolve => {
         const onSeeked = () => {
@@ -1033,42 +1060,25 @@ export default function ReportEditor() {
         dataUrl: canvas.toDataURL('image/jpeg', 0.6),
         isManual: false
       };
+      capturedByPositionIndex.set(job.index, newFrame);
       accumulatedFrames = [...accumulatedFrames, newFrame].sort((a, b) => a.time - b.time);
       flushSync(() => {
         setCapturedFrames(accumulatedFrames);
       });
       stateRef.current = { ...stateRef.current, capturedFrames: accumulatedFrames };
       startFrameUpload(newFrame.id, newFrame.dataUrl);
-      if (settings.autoInsertFrames && settings.autoInsertFrameIndices?.includes(i)) {
+    }
+    if (settings.autoInsertFrames && settings.autoInsertFrameIndices?.length) {
+      settings.autoInsertFrameIndices.forEach((positionIndex, insertOrderIndex) => {
+        const frame = capturedByPositionIndex.get(positionIndex);
+        if (!frame) return;
         const baseDelay = (settings.autoInsertDelay || 0) * 1000;
-        const insertOrderIndex = settings.autoInsertFrameIndices.indexOf(i);
         const actualDelay = baseDelay > 0 ? baseDelay * (insertOrderIndex + 1) : 0;
 
         setTimeout(() => {
-          if (!editorRef.current) return;
-          const emptyPlaceholder = editorRef.current.querySelector('.image-placeholder:not(.has-image):not([data-mode="manual"])') as HTMLElement | null;
-          if (emptyPlaceholder) {
-            emptyPlaceholder.innerHTML = `
-              <span class="delete-btn" contenteditable="false">×</span>
-              <img src="${newFrame.dataUrl}" style="max-width:${emptyPlaceholder.style.maxWidth || emptyPlaceholder.style.width || '200px'};max-height:${emptyPlaceholder.style.maxHeight || emptyPlaceholder.style.height || '200px'};display:block;object-fit:contain;object-position:left top;" draggable="false">
-            `;
-            emptyPlaceholder.classList.add('has-image');
-            emptyPlaceholder.style.border = 'none';
-            emptyPlaceholder.style.background = 'transparent';
-            emptyPlaceholder.style.width = 'auto';
-            emptyPlaceholder.style.height = 'auto';
-            emptyPlaceholder.style.lineHeight = 'normal';
-            emptyPlaceholder.style.maxWidth = emptyPlaceholder.style.maxWidth || emptyPlaceholder.style.width || '200px';
-            emptyPlaceholder.style.maxHeight = emptyPlaceholder.style.maxHeight || emptyPlaceholder.style.height || '200px';
-            emptyPlaceholder.style.textAlign = 'left';
-            emptyPlaceholder.style.verticalAlign = 'top';
-            emptyPlaceholder.style.justifyContent = 'flex-start';
-            emptyPlaceholder.style.alignItems = 'flex-start';
-            contentRef.current = editorRef.current.innerHTML;
-            saveDraftToStorage();
-          }
+          insertFrameIntoNextPlaceholder(frame);
         }, actualDelay);
-      }
+      });
     }
     if (settings.autoInsertFrames && editorRef.current) {
       contentRef.current = editorRef.current.innerHTML;
diff --git a/src/pages/SystemSettings.tsx b/src/pages/SystemSettings.tsx
index a03bd7f..26e8b1f 100644
--- a/src/pages/SystemSettings.tsx
+++ b/src/pages/SystemSettings.tsx
@@ -8,6 +8,7 @@ import { listTemplates } from '../api/templates';
 import { getSystemSettings, resetSystemSettings, updateSystemSettings } from '../api/settings';
 import { listAiModels } from '../api/ai';
 import { isLocalFallbackEnabled } from '../config/runtime';
+import { DEFAULT_FRAME_POSITIONS, normalizeFramePositions, roundFramePosition } from '../utils/framePositions';
 
 const normalizeSettings = (
   input: Partial<ISystemSettings & { frameMode?: 'uniform' | 'keep' }>,
@@ -17,9 +18,7 @@ const normalizeSettings = (
     ...DEFAULT_AI_PROVIDERS,
     ...(input.aiProviders || {}),
   };
-  const framePositions = Array.isArray(input.framePositions) && input.framePositions.length > 0
-    ? [...input.framePositions].sort((a, b) => a - b)
-    : [7.9, 9.3, 46.2, 49.1, 63.9, 64.8, 68.8, 73.7, 80.2, 85.0, 96.3, 98.6];
+  const framePositions = normalizeFramePositions(input.framePositions, DEFAULT_FRAME_POSITIONS);
 
   return {
     frameCount: framePositions.length,
@@ -40,7 +39,7 @@ export default function SystemSettings() {
   const [currentUser, setCurrentUser] = useState<User | null>(null);
   const [settings, setSettings] = useState<ISystemSettings & { frameMode?: 'uniform' | 'keep' }>({
     frameCount: 12,
-    framePositions: [7.9, 9.3, 46.2, 49.1, 63.9, 64.8, 68.8, 73.7, 80.2, 85.0, 96.3, 98.6],
+    framePositions: DEFAULT_FRAME_POSITIONS,
     defaultTemplate: '',
     frameMode: 'keep',
     activeAiProvider: 'kimi',
@@ -138,33 +137,31 @@ export default function SystemSettings() {
     });
   }, [navigate]);
 
-  const round1 = (n: number) => Math.round(n * 10) / 10;
-
   const computeFramePositions = (count: number, mode: 'uniform' | 'keep', currentPositions: number[]) => {
     if (mode === 'uniform') {
       const positions: number[] = [];
       for (let i = 1; i <= count; i++) {
-        positions.push(round1((100 / (count + 1)) * i));
+        positions.push(roundFramePosition((100 / (count + 1)) * i));
       }
       return positions;
     }
-    const sorted = [...currentPositions].sort((a, b) => a - b);
-    if (count <= sorted.length) {
-      return sorted.slice(0, count);
+    const next = normalizeFramePositions(currentPositions);
+    if (count <= next.length) {
+      return next.slice(0, count);
     }
-    const need = count - sorted.length;
-    const last = sorted[sorted.length - 1] || 0;
+    const need = count - next.length;
+    const last = next[next.length - 1] || 0;
     const range = 100 - last;
     for (let i = 1; i <= need; i++) {
-      sorted.push(round1(last + (range / (need + 1)) * i));
+      next.push(roundFramePosition(last + (range / (need + 1)) * i));
     }
-    return sorted;
+    return next;
   };
 
   const handleSave = async (e: React.FormEvent) => {
     e.preventDefault();
-    const sortedPositions = [...settings.framePositions].sort((a, b) => a - b);
-    const finalSettings = { ...settings, framePositions: sortedPositions, frameCount: sortedPositions.length };
+    const framePositions = normalizeFramePositions(settings.framePositions);
+    const finalSettings = { ...settings, framePositions, frameCount: framePositions.length };
     try {
       const savedSettings = await updateSystemSettings(finalSettings);
       const normalized = normalizeSettings(savedSettings, templates);
@@ -325,11 +322,11 @@ export default function SystemSettings() {
                         type="number" 
                         min="0" 
                         max="100"
-                        step="0.1"
-                        value={pos}
+                        step="0.01"
+                        value={Number.isFinite(pos) ? pos.toFixed(2) : '0.00'}
                         onChange={(e) => {
                           const newPos = [...settings.framePositions];
-                          newPos[idx] = Math.min(100, Math.max(0, parseFloat(e.target.value) || 0));
+                          newPos[idx] = roundFramePosition(parseFloat(e.target.value) || 0);
                           setSettings({ ...settings, framePositions: newPos });
                         }}
                         className="input-minimal w-full pr-6 text-center"
diff --git a/src/utils/framePositions.test.ts b/src/utils/framePositions.test.ts
new file mode 100644
index 0000000..0288f2c
--- /dev/null
+++ b/src/utils/framePositions.test.ts
@@ -0,0 +1,20 @@
+import { describe, expect, it } from 'vitest';
+import { buildFrameCaptureJobs, normalizeFramePositions, roundFramePosition } from './framePositions';
+
+describe('frame position utilities', () => {
+  it('rounds frame positions to two decimals without reordering them', () => {
+    expect(normalizeFramePositions([17.899, 9.304, 85])).toEqual([17.9, 9.3, 85]);
+  });
+
+  it('clamps invalid percentage values', () => {
+    expect(roundFramePosition(-1.234)).toBe(0);
+    expect(roundFramePosition(101.234)).toBe(100);
+  });
+
+  it('captures frames in timeline order while retaining original position indexes', () => {
+    expect(buildFrameCaptureJobs([17.9, 9.3], 100)).toEqual([
+      { index: 1, position: 9.3, time: 9.3 },
+      { index: 0, position: 17.9, time: 17.9 },
+    ]);
+  });
+});
diff --git a/src/utils/framePositions.ts b/src/utils/framePositions.ts
new file mode 100644
index 0000000..2d40dd4
--- /dev/null
+++ b/src/utils/framePositions.ts
@@ -0,0 +1,21 @@
+export const DEFAULT_FRAME_POSITIONS = [7.9, 9.3, 46.2, 49.1, 63.9, 64.8, 68.8, 73.7, 80.2, 85, 96.3, 98.6];
+
+export const roundFramePosition = (value: number) =>
+  Math.round(Math.min(100, Math.max(0, value)) * 100) / 100;
+
+export const normalizeFramePositions = (
+  positions: number[] | undefined,
+  fallback = DEFAULT_FRAME_POSITIONS,
+) => {
+  const source = Array.isArray(positions) && positions.length > 0 ? positions : fallback;
+  return source.map(roundFramePosition);
+};
+
+export const buildFrameCaptureJobs = (positions: number[], duration: number) =>
+  positions
+    .map((position, index) => ({
+      index,
+      position,
+      time: (position / 100) * duration,
+    }))
+    .sort((a, b) => a.time - b.time);