Update olddocs to reflect current implementation state

- REGISTRY.md: Mark phases 1-4, 6-8 complete; phase 5 partial
- WEB_UI.md: Update Phase 7 checklist with completion status
- DESIGN.md: Note TUI replaced by PySide6 GUI, update structure
- PROJECT.md: Update source structure and database schema
- PROVIDERS.md, META_TOOLS.md, COLLECTIONS.md: Add status notes
- Add "Features Implemented Beyond Original Design" sections

Co-Authored-By: Claude Opus 4.5 <[email protected]>

olddocs/COLLECTIONS.md

@@ -1,5 +1,14 @@
 # CmdForge Collections
 
+> **Document Status (January 2026)**: Collections are partially implemented:
+> - ✅ API endpoints (`/api/v1/collections`, etc.)
+> - ✅ Web UI pages (`/collections`, `/collections/:name`)
+> - ✅ Database schema
+> - ❌ CLI commands (`cmdforge collections list/install`) - Not implemented
+> - ❌ Registry repo sync - Not implemented
+>
+> Collections can be browsed on the web and via API, but must be installed tool-by-tool via CLI.
+
 Collections are curated groups of tools that can be installed together with a single command.
 
 ## Use Cases