chore(mac-mini): remove all AI service infrastructure (moved to Windows GPU)

The Mac Mini hasn't run mana-llm/stt/tts/image-gen for a while — those
services live on the Windows GPU server now. The Mac-targeted
installers, plists, and platform-checking setup scripts have been
sitting in the repo as cargo-cult, suggesting Mac Mini deployment is
still a real option. It isn't.

Removed (Mac-Mini deployment infrastructure):

services/mana-stt/
- com.mana.mana-stt.plist            (LaunchAgent)
- com.mana.vllm-voxtral.plist        (LaunchAgent for the abandoned local Voxtral experiment)
- install-service.sh                 (single-service launchd installer)
- install-services.sh                (mana-stt + vllm-voxtral installer)
- setup.sh                           (Mac arm64 installer)
- scripts/setup-vllm.sh              (vLLM-Voxtral setup)
- scripts/start-vllm-voxtral.sh

services/mana-tts/
- com.mana.mana-tts.plist
- install-service.sh
- setup.sh                           (Mac arm64 installer)

scripts/mac-mini/
- setup-image-gen.sh                 (Mac flux2.c launchd installer)
- setup-stt.sh
- setup-tts.sh
- launchd/com.mana.image-gen.plist
- launchd/com.mana.mana-stt.plist
- launchd/com.mana.mana-tts.plist

setup-tts-bot.sh stays — it's the Matrix TTS bot installer (Synapse
side), not the mana-tts service.

Updated:
- services/mana-stt/CLAUDE.md, README.md — fully rewritten for the
  Windows GPU reality (CUDA WhisperX, Scheduled Task ManaSTT, .env keys
  matching the actual production .env on the box)
- services/mana-tts/CLAUDE.md, README.md — same treatment, documenting
  Kokoro/Piper/F5-TTS on the Windows GPU under Scheduled Task ManaTTS
- scripts/mac-mini/README.md — dropped the STT setup section, replaced
  with a pointer to docs/WINDOWS_GPU_SERVER_SETUP.md and the per-service
  CLAUDE.md files
- docs/MAC_MINI_SERVER.md — expanded the "deactivated launchagents"
  list to mention the now-removed plists, added the full GPU service
  port table with public URLs, added a cleanup snippet for any old plists
  still installed on a Mac Mini somewhere

scripts/mac-mini/README.md

@@ -23,7 +23,6 @@ cd ~/projects/mana-monorepo
 | Script | Purpose |
 |--------|---------|
 | `setup-autostart.sh` | Configure automatic startup on boot (run once) |
-| `setup-stt.sh` | Setup STT service (Whisper + Voxtral) |
 | `startup.sh` | Main startup script (called by launchd) |
 | `health-check.sh` | Check all services health |
 | `status.sh` | Show full system status |
@@ -257,29 +256,18 @@ ollama list
 ollama pull gemma3:4b
 ```
 
-### STT Service (Speech-to-Text)
+### AI Services (STT, TTS, LLM, Image-Gen, Video-Gen)
 
-The STT service provides Whisper and Voxtral transcription:
+These have moved off the Mac Mini entirely. They run on the Windows GPU
+server (`mana-server-gpu`) as Windows Scheduled Tasks. See
+[`docs/WINDOWS_GPU_SERVER_SETUP.md`](../../docs/WINDOWS_GPU_SERVER_SETUP.md)
+for setup, and the per-service `services/mana-{stt,tts,llm,image-gen,video-gen}/CLAUDE.md`
+files for endpoint details.
 
-```bash
-# Setup (first time)
-./scripts/mac-mini/setup-stt.sh
+Public URLs (proxied via Cloudflare Tunnel + the Mac Mini gpu-proxy):
 
-# Check status
-curl http://localhost:3020/health
-
-# Transcribe audio
-curl -X POST http://localhost:3020/transcribe \
-  -F "file=@audio.mp3" \
-  -F "language=de"
-
-# View logs
-tail -f /tmp/mana-stt.log
-```
-
-**Available endpoints:**
-- `POST /transcribe` - Whisper transcription (recommended)
-- `POST /transcribe/voxtral` - Voxtral transcription
-- `POST /transcribe/auto` - Auto-select model
-- `GET /health` - Health check
-- `GET /models` - List available models
+- `https://gpu-stt.mana.how`
+- `https://gpu-tts.mana.how`
+- `https://gpu-llm.mana.how`
+- `https://gpu-img.mana.how`
+- `https://gpu-video.mana.how`