chore: add changeset for app

Author: andrewmelchor

.changeset/famous-colts-double.md

@@ -0,0 +1,12 @@
+---
+"@t-req/app": patch
+---
+
+- **Startup Auto-Update**: Automatic update checks with optional auto-upgrade for `treq open`, `tui`, and `web` commands
+  - 24-hour check caching in `~/.treq/auto-update.json`
+  - 24-hour backoff for failed upgrade attempts
+  - CLI flags: `--auto-update` / `--no-auto-update` (default: enabled)
+  - Environment variable: `TREQ_AUTO_UPDATE`
+  - TUI toast notifications for update states
+ Fixes
+- **TUI Modal**: Fixed list overflow issues in picker modals with proper scrollbox constraints and centralized scroll index logic