feat: persist LLM/TTS backend choice + reset/repeat context + quick-search + diagnostics
Closes the UX hole I created in 5c72450: voice-swap to Ollama used to vanish
after restart. Plus P0.3 (long-standing roadmap item) and two new packs.
Persistent backend choice (crates/jarvis-core/src/db/structs.rs)
- Settings struct gains llm_backend + tts_backend fields (both String,
"" / "auto" = follow env/auto-detect).
- set("llm_backend", "groq"|"ollama"|"auto") validates input.
- llm::init_global() reads DB first, then JARVIS_LLM env, then auto-detect.
- llm::swap_to() now persists the choice via db::save_settings.
- Voice swap "переключись на локальный" now survives restart.
Shared conversation history (P0.3, crates/jarvis-core/src/llm/mod.rs)
- HISTORY: Lazy<RwLock<Option<ConversationHistory>>> singleton.
- Helpers: init_history, history_push_user, history_push_assistant,
history_snapshot, history_clear, history_pop_last_user, history_last_assistant.
- llm_fallback migrated off its own Mutex<History> — now reads/writes shared.
- ConversationHistory gains last_assistant() method.
New Lua APIs
- jarvis.llm_reset() → clear conversation turns (keeps system prompt).
- jarvis.llm_last_reply() → string or nil (last assistant message text).
- jarvis.health() → debug table {tts_backend, llm_backend, llm_model,
active_profile, memory_facts, scheduled_tasks,
language, voice, microphone, vosk_model,
noise_suppression}. No secrets included.
New voice packs
- resources/commands/llm_context/ (P0.3)
* "сбрось контекст" / "забудь разговор" → llm.reset
* "повтори последнее" / "повтори ответ" → llm.repeat (uses last_assistant)
- resources/commands/quick_search/ (imba P1 item)
* "найди в гугле <X>" / "загугли <X>"
* Uses DuckDuckGo Instant Answer API (api.duckduckgo.com, no key required).
Pulls AbstractText or RelatedTopics into LLM prompt; falls back to pure
LLM knowledge if DDG returns nothing useful. Speaks 2-4 sentence answer.
- resources/commands/diagnostics/
* "диагностика" / "доложи о себе" / "статус"
* Reads jarvis.health() and speaks a one-line summary. Useful when
debugging — user can read out their current state for a bug report.
Build: cargo build --release -p jarvis-app -p jarvis-gui green.
Tests: 52/52 jarvis-core unit tests pass.
385bd5c8ce