* fix: Multi-session UI improvements and HTTP instance recognition
- Separate server and session lifecycle in HTTP Local mode
- Show 'Start Server' / 'Stop Server' button for server control
- Show 'Start Session' / 'End Session' button when server is running
- No auto-join on server start (requires manual session start)
- Show instance name instead of port in session status (e.g. 'Session Active (ramble)')
- Use native project_hash for HTTP instance recognition instead of computed SHA256
- Fix test expectations for manage_asset JSON parsing error messages
* fix: Multi-session UI improvements and HTTP instance recognition
- Separate server and session lifecycle in HTTP Local mode
- Show 'Start Server' / 'Stop Server' button for server control
- Show 'Start Session' / 'End Session' button when server is running
- Auto-start session when THIS instance starts the server
- Require manual session start when connecting to external server
- Auto-detect and end orphaned sessions when server stops
- Show instance name instead of port in session status
- Use native project_hash for HTTP instance recognition
- Guard against empty hash with warning log
- Remove dead code (duplicate _safe_response)
- Add defensive path handling for instance name extraction