Add typed command popup

[aleemElmozogi]

Summary

Adds a typed command popup alongside the existing voice push-to-talk flow. Users can press a customizable global hotkey, default ⌥ + ⌘ + K, to open a compact text input near the cursor and submit a command with Enter.

Changes

• Added persisted text hotkey model and validation.
• Added global text input shortcut monitor using a listen-only CGEvent tap.
• Added compact cursor-following text popup.
• Routed typed commands through the existing screenshot → Claude → TTS/pointing pipeline.
• Added Text Hotkey recorder UI in the menu bar panel.
• Added shortcut validation unit tests.
• Updated AGENTS.md documentation.

Testing

• Ran git diff --check.
• Ran Swift parse checks for the shortcut model and text monitor.
• Added unit tests for default text shortcut and voice shortcut conflict validation.
• Manual Xcode validation still recommended because repo instructions prohibit terminal xcodebuild.