fix(local-llms): cross-platform audit — 8 bugs/gaps fixed
- setup-tts.sh: make fully cross-platform (macOS + Linux/WSL2)
- OS detection, apt fallback, CUDA PyTorch install, nvidia-smi check
- cross-platform playback hints, HF_MIRROR env override
- api/system/route.ts: fix ffmpeg detection (use -version not --version)
- api/system/memory/route.ts: remove unused total variable in Linux path
- api/system/exec/route.ts: expand allowlist with Linux commands
(head, tail, grep, which, ps, uname, free, lscpu, nvidia-smi, etc.)
- api/tts/route.ts: cross-platform venv path + CUDA/MPS label
- api/whisper/route.ts: Linux binary/model paths
- api/ollama/logs/route.ts: Linux log paths + WSL2 hint
- test_qwen_tts.py: platform-aware speech text + CUDA device detection
- test_orpheus_tts.py: platform-aware text, move import sys to top
- setup-guide.md: fix false auto-detect claim, add HF_MIRROR hint
b1d2e4ec81