feat: add video OCR/ASR, DOCX/PDF export, input block and risk config updates

- Video pipeline: video file OCR via VLM plus audio track ASR, integrated
  into job_handlers with progress emit per phase. New media_utils.py for
  audio extraction from video files.
- Document export: richExport.js replaces inline docx builder; DOCX and PDF
  export buttons are now enabled in MilkdownEditor. File size limit raised to
  100 MB.
- Input block: new InputBlockCrepe.vue component with inputBlockPlugin.ts
  and inputBlock.js for custom user-input nodes in the editor.
- Risk config: added Vite dev server ports (5173) to CORS allowlist and
  increased OCR max input from 10 MB to 100 MB.
- TTS/ASR refactor: simplified tts_asr.py model loading and warmup logic.
- Test coverage: updated tests for llm, main endpoints, pro completions and
  web search modules.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/DocBlockCrepe.vue

@@ -56,6 +56,7 @@ import { hiddenTextInputPlugin, hiddenTextNode, hiddenTextRemark, hiddenTextView
 import { fetchSuggestion, submitCompress, pollCompressStatus } from '../utils/api.js'
 import { isDocumentVisible, getRecommendedDebounce, getRecommendedSyncInterval } from '../composables/useVisibility.js'
 
+const COPILOT_TOGGLE_EVENT = 'llm-in-text:copilot-toggle'
 const props = defineProps({
   docType: { type: String, default: 'txt' },
   docName: { type: String, default: 'document.txt' },
@@ -77,6 +78,7 @@ let crepe = null
 let syncTimer = null
 let syncingExternal = false
 let compressPoller = null
+let copilotToggleHandler = null
 
 const handleCompress = () => {
   if (compressState.value !== 'idle') return
@@ -233,8 +235,26 @@ onMounted(async () => {
 
   crepe.editor.action((ctx) => {
     const view = ctx.get(editorViewCtx)
-    setCopilotEnabled(view, true)
+    const enabled = typeof window !== 'undefined'
+      ? window.__LLM_IN_TEXT_COPILOT_ENABLED__ !== false
+      : true
+    setCopilotEnabled(view, enabled)
+    if (!enabled) {
+      clearGhostSuggestion(view)
+    }
   })
+
+  copilotToggleHandler = (event) => {
+    const enabled = Boolean(event?.detail?.enabled)
+    crepe?.editor?.action((ctx) => {
+      const view = ctx.get(editorViewCtx)
+      setCopilotEnabled(view, enabled)
+      if (!enabled) {
+        clearGhostSuggestion(view)
+      }
+    })
+  }
+  window.addEventListener(COPILOT_TOGGLE_EVENT, copilotToggleHandler)
 })
 
 onUnmounted(() => {
@@ -246,6 +266,10 @@ onUnmounted(() => {
     compressPoller.stop()
     compressPoller = null
   }
+  if (copilotToggleHandler) {
+    window.removeEventListener(COPILOT_TOGGLE_EVENT, copilotToggleHandler)
+    copilotToggleHandler = null
+  }
   if (crepe) {
     crepe.editor.action((ctx) => {
       const view = ctx.get(editorViewCtx)
@@ -444,4 +468,3 @@ onUnmounted(() => {
   display: none !important;
 }
 </style>
-