Fix panels not redrawing on async updates

[bluestreak01]

Summary

• Bug: CI panel showed "loading" forever after pressing F2 or expanding a tree node. Shell and Claude panels had the same issue — async results arrived but the screen never refreshed until a mouse click.
• Root cause: Focused panel handlers (handle_ci_action, handle_claude_action, handle_shell_action) intercepted Action::Tick and polled async sources, but never set self.dirty = true. The event loop only redraws when dirty, so results were silently dropped.
• Fix: Extract all async polling into a single poll_async() method called at the top of handle_action() before focus-based dispatch. This ensures polling and dirty-flagging happen exactly once per tick regardless of which panel has focus.

What changed

The dispatch flow was:

handle_action(Tick)
  ├── if ci_focused → handle_ci_action(Tick) → poll + NO dirty → return
  ├── if claude_focused → handle_claude_action(Tick) → poll + NO dirty → return
  └── main match { Tick => poll + dirty ✓ }   ← never reached when focused

Now:

handle_action(Tick)
  ├── poll_async()  → poll everything + dirty ✓ → return
  │   (CI, Claude, Shell, git, watcher, archive, file search)
  └── handle_action(keypress)
      ├── if ci_focused → handle_ci_action(keypress)  ← input only
      └── main match { ... }

Net -79 lines — duplicated polling code across 4 handlers consolidated into one method.

Test plan

• F2 to open CI panel — checks load and render without clicking
• Expand a CI check node — steps appear without clicking
• Ctrl+O shell — output renders in real time
• F12 Claude — output renders in real time
• Ctrl+S file search — results stream in while searching

🤖 Generated with Claude Code