chore: remove completed/superseded spec docs

These task specs are shipped or abandoned (verified against the code) and
are not loaded as runtime prompts or referenced as living docs in any
CLAUDE.md. Removing dead planning artifacts.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

TODO.md

@@ -1,11 +0,0 @@
-# TODO
-
-- [x] Add video gallery section — gracefully integrate the 4 client videos from WhatsApp into the site
-  - Videos on server: `audiohub-indexer:~/whatsapp-bot-v2/media/50688001130/`
-    - `1775157712611.mp4`
-    - `1775161187441.mp4`
-    - `1775161197452.mp4`
-    - `1775161210201.mp4`
-  - Compressed to 720p (61MB → 33MB), poster thumbnails generated
-  - Added "Videos de Obra" section between Gallery and Contact
-  - Deployed to soluciones-o-c-l.pages.dev