Remove manifest.json from git tracking (machine-specific state)

Add manifest.json to .gitignore so it doesn't conflict between machines.
Also add CLAUDE.md for Claude Code guidance.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -1,34 +1,37 @@
-# Audio files
-audio/
-*.mp3
-*.wav
-
-# Whisper models
-models/
-*.bin
-
-# Credentials
-.env
-
-# Transcripts and summaries (large generated content)
-transcripts/
-summaries/
-
-# Binaries (downloaded by setup_whisper.py)
-whisper-bin/
-ffmpeg-bin/
-
-# Temp files
-.whisper_bin_path
-.ffmpeg_bin_path
-
-# WAV cache (converted from MP3)
-audio_wav/
-
-# Python
-__pycache__/
-*.pyc
-.venv/
-
-# Logs
-*.log
+# Audio files
+audio/
+*.mp3
+*.wav
+
+# Whisper models
+models/
+*.bin
+
+# Manifest (machine-specific state)
+manifest.json
+
+# Credentials
+.env
+
+# Transcripts and summaries (large generated content)
+transcripts/
+summaries/
+
+# Binaries (downloaded by setup_whisper.py)
+whisper-bin/
+ffmpeg-bin/
+
+# Temp files
+.whisper_bin_path
+.ffmpeg_bin_path
+
+# WAV cache (converted from MP3)
+audio_wav/
+
+# Python
+__pycache__/
+*.pyc
+.venv/
+
+# Logs
+*.log