feat: 新增智慧簡報旁白生成系統 (Smart Slide Voiceover System)

- 新增 Excel 輸入模組：解析 .xlsx 格式講稿檔案
- 新增 TTS 引擎模組：整合 edge-tts 調用 Azure Neural Voice
- 新增 PyQt6 圖形介面：檔案選擇、語音選擇、進度監控
- 新增執行緒模型：QThread + Asyncio 確保 UI 響應性
- 支援 10 種 Neural Voice (中文/越南/英文)
- 支援中英混雜、越英混雜發音

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,19 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(openspec list:*)",
+      "Bash(openspec validate:*)",
+      "Bash(python:*)",
+      "Bash(conda env create:*)",
+      "Bash(conda activate:*)",
+      "Bash(conda run:*)",
+      "Bash(set PYTHONUTF8=1)",
+      "Bash(del:*)",
+      "Bash(openspec archive add-tts-voiceover-system:*)",
+      "Bash(git init:*)",
+      "Bash(git config:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)"
+    ]
+  }
+}