Go To quick switcher: fuzzy-jump to any session, grouped, with state #168

This was generated by AI during triage.

Summary

Add a "Go To" quick switcher. A single shortcut opens a fuzzy list of every session — live and dormant — grouped by group, with its state, branch and folder. Enter focuses the selected session, or wakes it if it's dormant.

Motivation

With 40+ sessions, Ctrl+Tab cycling and scrolling the sidebar are slow, and full-text search (Ctrl+F) answers a different question.

Herdr v0.9.2 added exactly this: "Go To shows every agent and terminal as its own row, grouped by workspace, with its status and path. Left and Right jump between workspaces." Its search matches words independently, so api fix finds "fix-auth (api)".

Proposal

• The popup. A modal popup over the toolbar/sidebar area. Remember it cannot draw over the terminal panes, because WebView2 is an HwndHost (CLAUDE.md, "Session Spinners"). Either collapse TerminalGrid while it's open, or use a separate top-level window.
• Each row. Accent stripe, name, group, folder, branch, and state (waiting input / approval / working once Show which sessions have an agent actively working, plus an activity timeline across sessions #154 lands, dormant 💤).
• Matching. Case-insensitive, word-independent match on name, folder, group and branch.
• Ordering. Sessions needing attention first, then most-recently-active.
• Keys. ↑↓ to move, Enter to focus (calls FocusSession, so keyboard focus follows), Esc to close. Optionally Ctrl+Enter to wake a dormant session without switching to it.
• The shortcut. Must work while a terminal has focus, via OnBridgeAcceleratorKey. Pick a key the terminal apps don't need: Ctrl+K is readline's kill-line, so Ctrl+Shift+P or Ctrl+Alt+Space may be safer.