wip: local changes and task backlog

- Refactor agent-form-dropdowns component
- Simplify app index routing
- Update agent-input-area and message-input
- Improve worktree utility with tests
- Add task backlog for upcoming work

.tasks/253b2ff3.md

@@ -0,0 +1,14 @@
+---
+id: 253b2ff3
+title: Clickable file paths in chat open bottom sheet for fast preview
+status: open
+deps: []
+created: 2026-01-08T16:22:16.892Z
+---
+
+
+## Notes
+
+**2026-01-08T16:22:21.730Z**
+
+Improve file path detection in chat messages. On click, open bottom sheet with file preview instead of navigating away.