chore(deps): 미사용 의존성 8종 제거 + electron-builder Linux 섹션 삭제 (WS-DEPS)

- apps/desktop/package.json에서 8종 제거(각 역추적 0건):
  @mui/icons-material, @d3ro/api-client, fluent-ffmpeg, @types/fluent-ffmpeg,
  pdf-parse, node-record-lpcm16, electron-audio-loopback, @electron-toolkit/preload
- node-record-lpcm16.d.ts 타입 선언 삭제
- electron-builder.yml Linux 섹션 삭제 (CI는 win/mac만 호출)
참고: @mui/icons-material은 @d3ro/ui 트랜시티브로 잔존(desktop 직접 의존에서는 제거)
정책: docs/REFACTOR_POLICY.md DP9

apps/desktop/package.json

@@ -26,7 +26,6 @@
   "devDependencies": {
     "@electron-toolkit/tsconfig": "^1.0.1",
     "@types/better-sqlite3": "^7.6.13",
-    "@types/fluent-ffmpeg": "^2.1.28",
     "@types/node": "^22.13.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
@@ -38,32 +37,25 @@
     "vitest": "^2.1.0"
   },
   "dependencies": {
-    "@d3ro/api-client": "*",
     "@d3ro/core": "*",
     "@d3ro/i18n": "*",
     "@d3ro/ui": "*",
-    "@electron-toolkit/preload": "^3.0.2",
     "@electron-toolkit/utils": "^4.0.0",
     "@emotion/react": "^11.14.0",
     "@emotion/styled": "^11.14.0",
     "@ffmpeg-installer/ffmpeg": "^1.1.0",
-    "@mui/icons-material": "^7.0.0",
     "@mui/material": "^7.0.0",
     "@nut-tree-fork/nut-js": "^4.2.6",
     "@supabase/supabase-js": "^2.45.0",
     "better-sqlite3": "^12.8.0",
     "docx": "^9.6.1",
     "drizzle-orm": "^0.45.2",
-    "electron-audio-loopback": "^1.0.6",
     "electron-log": "^5.2.0",
     "electron-store": "^10.0.0",
     "electron-updater": "^6.3.9",
-    "fluent-ffmpeg": "^2.1.3",
     "lucide-react": "^1.25.0",
-    "node-record-lpcm16": "^1.0.1",
     "overlayscrollbars": "^2.16.0",
     "overlayscrollbars-react": "^0.5.6",
-    "pdf-parse": "^2.4.5",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-markdown": "^10.1.0",