Bump to v2.2.0: fix warning/bubble sounds, add klaxon, refresh docs

- index.html: fix playWarningSound (440→550 Hz, louder), fix playBubbleSound
  (audible volumes/durations), add looping klaxon sound (sawtooth wah-wah),
  stopKlaxon() on tap and state clear, bump VERSION to v2.2.0
- kao_tui.py: add klaxon to SOUNDS list, drop notify duration 5→2s for
  faster iteration; also include improved post() error reporting
- CLAUDE.md: add kao_tui.py to file structure, fix personality table
  (remove ˙▿˙ row not in aggregator), add klaxon to sound list
- README.md: add klaxon to sound list, update counts
- openapi.yaml: bump version to 2.2.0, add klaxon to sound enum

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -103,7 +103,7 @@ All detectors support: `AGGREGATOR_URL`, `CHECK_INTERVAL`, `THRESHOLD_WARNING`,
 | `emote` | No | Custom emote to display |
 | `color` | No | Custom color (hex, e.g., `#FF9900`) |
 | `animation` | No | One of: `breathing`, `shaking`, `popping`, `celebrating`, `floating`, `bouncing`, `swaying` |
-| `sound` | No | One of: `chime`, `alert`, `warning`, `critical`, `success`, `notify`, `doorbell`, `knock`, `ding`, `blip`, `siren`, `tada`, `ping`, `bubble`, `fanfare`, `alarm`, `none` |
+| `sound` | No | One of: `chime`, `alert`, `warning`, `critical`, `success`, `notify`, `doorbell`, `knock`, `ding`, `blip`, `siren`, `tada`, `ping`, `bubble`, `fanfare`, `alarm`, `klaxon`, `none` |
 
 ## Priority System
 
@@ -123,7 +123,6 @@ The optimal state face is set once per day on `/wake` (random pick). Each mornin
 | Emote | Animation | Vibe |
 |-------|-----------|------|
 | `( ^_^)` | breathing | calm |
-| `( ˙▿˙)` | floating | content |
 | `(◕‿◕)` | bouncing | cheerful |
 | `( ・ω・)` | swaying | curious |
 | `( ˘▽˘)` | breathing | cozy |
@@ -177,6 +176,7 @@ Use in automations:
 ├── kao.py              # Unified entry point
 ├── aggregator.py       # Event broker/API server
 ├── index.html          # OLED-optimized frontend
+├── kao_tui.py          # Developer TUI for testing sounds/events
 ├── config.json         # Runtime configuration
 ├── openapi.yaml        # API documentation (OpenAPI 3.0)
 ├── detectors/