feat(ui): panel pin/dock, FLIP animations and workspace management (#43)

* chore: remove deprecated macOS native and web apps

* feat(backend): add forget_workspace_data command

Deletes all sessions, plans, and comments for a workspace in one call.

* fix(types): add emit to Tauri event type declarations

* feat(ui): panel pin/dock, FLIP animations and workspace card redesign

- Outline and Review panels can be pinned (docked) or floating
- FLIP-based expand/minimize animations with backdrop
- Workspace cards: direct close, forget action with confirmation
- Outline icon changed from Hash to AlignLeft

* fix: address review feedback from PR #43

- Wrap delete_comments_for_file in a transaction
- Clear animation timers before reassigning
- Add storage event sync for pinned panel state
- Add aria-label to OutlineSidebar icon buttons
- Handle async forget errors in WorkspaceCard

* feat: delete orphaned comments when forgetting a workspace

- Add delete_comments_for_workspace using LIKE prefix match
- Call it in the directory forget flow alongside session cleanup
- Show forget button for file workspaces too

* fix: address second round of PR #43 review feedback

- Finalize expand state when cardRect is unavailable
- Handle storage key removals when syncing pin state
- Replace raw buttons with shadcn Button on toggle icons
- Add aria-label to all icon-only buttons

* fix: address third round of PR #43 review feedback

- Validate workspace_type and shorten DB lock scope in forget flow
- Mock onForget as async to match component contract
- Show action controls on keyboard focus via group-focus-within

Author: wilcorrea