feat(dictate): add voice-reactive listening waveform

extensions/dictate/README.md

@@ -61,12 +61,15 @@ The active profile is repository-linked on the tested host. Start a new Pi sandb
 
 Shortcuts are handled by Pi's main editor. They do not claim to work while a selector, confirmation, or custom modal owns input. If a modal opens after recording starts, a successful result still goes only to the main editor.
 
-The footer shows static service states:
+The footer shows service state. While recording, a red circle and twelve-cell scrolling waveform make active capture visible and react to the microphone level:
 
-- `loading model...`
-- `listening...`
-- `stopping...`
-- `transcribing...`
+```text
+● listening  ▁▂▄▇█▆▃▂▅▇▄▂
+```
+
+The circle uses Pi's semantic error color and the waveform uses its accent color. The other states remain `loading model...`, `stopping...`, and `transcribing...`. Audio levels are bounded scalar protocol events; raw audio remains inside the host service.
+
+This indicator requires protocol version 2. Run the installer again after updating the repository so the installed host service and repository-linked extension upgrade together.
 
 Only a non-empty finalized result for the current generation changes the editor. Empty speech, cancellation, stale results, disconnects, and failures do not insert text.