docs(debug): mark bilibili subtitle debug session as resolved

All fixes verified working:
- Video download for videos without official subtitles
- Whisper transcription with correct offset parsing
- Text extraction from Whisper JSON format
- End-to-end analysis with real video content

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/debug/bilibili-video-subtitle-empty.md

@@ -1,8 +1,8 @@
 ---
-status: verifying
+status: resolved
 trigger: "kb-workflow 处理 Bilibili 视频 BV16cNMzpExh 时，字幕内容为空，导致生成的笔记没有真实内容"
 created: 2026-03-15T10:30:00Z
-updated: 2026-03-15T13:30:00Z
+updated: 2026-03-16T00:30:00Z
 ---
 
 ## Current Focus
@@ -99,7 +99,12 @@ fix: |
   - kb_pipeline/platforms/bilibili.py: 添加 download_video() 方法
   - kb_pipeline/processors/download.py: 调用视频下载逻辑
   - kb_pipeline/processors/asr.py: 修复缩进错误
-verification: 导入成功，需要端到端测试验证
+verification: |
+  ✅ 已通过端到端测试验证
+  - 视频下载成功 (m4a 格式)
+  - Whisper 语音识别成功生成字幕
+  - 分析步骤正确读取字幕内容
+  - 生成的分析报告包含真实视频内容（具体数据如 CPI、PPI、M1 等）
 files_changed:
   - kb_pipeline/config.py
   - kb_pipeline/platforms/bilibili.py