feat: Ollama LLM backend + 5 utility packs (daily briefing, pomodoro, currency convert, stocks, habits, translate clipboard)

Local-LLM support so J.A.R.V.I.S. works offline without GROQ_TOKEN.

LLM multi-backend (crates/jarvis-core/src/llm/client.rs)
  - LlmBackend enum {Groq, Ollama}. Both use OpenAI-compatible /v1/chat/completions
    (Ollama exposes one natively at :11434/v1).
  - LlmClient::from_env() now dispatches on JARVIS_LLM=groq|ollama. Auto-detect:
    Groq if GROQ_TOKEN set, else Ollama.
  - New helpers: LlmClient::groq() (was: from_env), LlmClient::ollama().
  - Reqwest client now has a 60s timeout (was: unbounded — Groq freezes could hang).
  - api_key skipped when empty (Ollama doesn't need auth).
  - Defaults: OLLAMA_BASE_URL=http://localhost:11434/v1, OLLAMA_MODEL=qwen2.5:3b.
    Override via OLLAMA_BASE_URL / OLLAMA_MODEL env.
  - llm_fallback + llm_router log the active backend on init.
  - Tests: 32/32 pass. Renamed `from_env_fails` → `groq_fails_when_token_missing`,
    added `ollama_works_without_token`.

Daily briefing pack (resources/commands/daily_briefing/, 3 commands)
  - setup.lua: "настрой утренний брифинг на 9:00" → adds a daily scheduled task
    that runs now.lua via the scheduler's Lua-action support.
  - now.lua: greeting + time + active profile + scheduled task count + memory recap
    + LLM motivational nudge. Voice-triggered ("утренний брифинг") works the same.
  - off.lua: removes the scheduled task.

Pomodoro pack (resources/commands/pomodoro/, 2 commands)
  - start.lua / stop.lua + tick.lua (re-scheduled by itself). State stored in
    jarvis.state — phase alternates work (25 min) / break (5 min) until stop.

Currency conversion (resources/commands/currency/convert.lua)
  - "сколько будет 1000 долларов в рублях" — fetches CBR daily rates from
    cbr-xml-daily.ru, normalises by Nominal, prints both directions.
  - Recognises USD/EUR/CNY/GBP/JPY/RUB by substring. Pluralises russian units.

Stocks pack (resources/commands/stocks/, 1 command)
  - "сколько Сбер" → MOEX ISS /iss/engines/stock/markets/shares/securities/<TKR>.
  - Mapping of 22 popular Russian tickers to common names (Сбер→SBER, Газпром→GAZP,
    Лукойл→LKOH, Яндекс→YDEX, Т-банк→T, etc).
  - Picks TQBR (main board) row, reports LAST + LASTTOPREVPRICE%.

Habit nudges (resources/commands/habit_nudge/, 4 commands)
  - "напоминай мне пить воду"     → every 2 hours
  - "напоминай мне размяться"     → every 50 minutes
  - "напоминай отдыхать глазам"  → every 20 minutes (20-20-20 rule)
  - "отключи все привычки"        → stops all three by id.

Translate clipboard (resources/commands/translate/clipboard.lua)
  - "переведи буфер на английский" → grabs clipboard, sends to LLM, speaks first
    sentence, replaces clipboard with full translation, fires notification.

Build: cargo build --release -p jarvis-app -p jarvis-gui both green. 32/32 tests.

To use Ollama:
  1. Install + run Ollama (https://ollama.com).
  2. `ollama pull qwen2.5:3b` (or any chat model).
  3. Optional: `set JARVIS_LLM=ollama` (auto-picked if GROQ_TOKEN unset).

resources/commands/habit_nudge/command.toml

@@ -0,0 +1,69 @@
+# Habit nudges — convenient wrappers for popular recurring reminders.
+
+[[commands]]
+id = "habit.water"
+type = "lua"
+script = "water.lua"
+sandbox = "standard"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "напоминай мне пить воду",
+    "напоминай попить воду",
+    "включи напоминание про воду",
+]
+en = ["remind me to drink water", "water reminder"]
+ua = ["нагадуй мені пити воду"]
+
+
+[[commands]]
+id = "habit.stretch"
+type = "lua"
+script = "stretch.lua"
+sandbox = "standard"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "напоминай мне размяться",
+    "напоминай делать зарядку",
+    "включи напоминание про разминку",
+    "напоминай вставать",
+]
+en = ["remind me to stretch", "stretch reminder"]
+ua = ["нагадуй мені розім'ятися"]
+
+
+[[commands]]
+id = "habit.eyes"
+type = "lua"
+script = "eyes.lua"
+sandbox = "standard"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "напоминай отдыхать глазам",
+    "напоминай про глаза",
+    "20 20 20",
+]
+en = ["remind me to rest eyes", "eye reminder"]
+ua = ["нагадуй про очі"]
+
+
+[[commands]]
+id = "habit.stop_all"
+type = "lua"
+script = "stop_all.lua"
+sandbox = "minimal"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "отключи все привычки",
+    "хватит напоминать про привычки",
+    "выключи все напоминалки",
+]
+en = ["stop all habits", "disable habit reminders"]
+ua = ["вимкни всі звички"]

resources/commands/habit_nudge/eyes.lua

@@ -0,0 +1,18 @@
+-- 20-20-20 rule: every 20 min look 20ft away for 20s.
+jarvis.scheduler.remove("habit_eyes")
+local ok, err = pcall(function()
+    jarvis.scheduler.add({
+        id = "habit_eyes",
+        name = "20-20-20 eye rest",
+        schedule = "every 20 minutes",
+        action = { type = "speak", text = "Отвлекитесь от экрана на двадцать секунд." }
+    })
+end)
+if not ok then
+    jarvis.speak("Не получилось.")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+jarvis.speak("Включил правило двадцать двадцать двадцать.")
+jarvis.audio.play_ok()
+return { chain = false }

resources/commands/habit_nudge/stop_all.lua

@@ -0,0 +1,14 @@
+local removed = 0
+for _, id in ipairs({ "habit_water", "habit_stretch", "habit_eyes" }) do
+    if jarvis.scheduler.remove(id) then
+        removed = removed + 1
+    end
+end
+if removed > 0 then
+    jarvis.speak("Отключил привычек: " .. removed .. ".")
+    jarvis.audio.play_ok()
+else
+    jarvis.speak("Привычки и так не запущены.")
+    jarvis.audio.play_not_found()
+end
+return { chain = false }

resources/commands/habit_nudge/stretch.lua

@@ -0,0 +1,17 @@
+jarvis.scheduler.remove("habit_stretch")
+local ok, err = pcall(function()
+    jarvis.scheduler.add({
+        id = "habit_stretch",
+        name = "Stretch break",
+        schedule = "every 50 minutes",
+        action = { type = "speak", text = "Время размяться. Встаньте, пройдитесь." }
+    })
+end)
+if not ok then
+    jarvis.speak("Не получилось.")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+jarvis.speak("Каждые 50 минут буду напоминать размяться.")
+jarvis.audio.play_ok()
+return { chain = false }

resources/commands/habit_nudge/water.lua

@@ -0,0 +1,17 @@
+jarvis.scheduler.remove("habit_water")
+local ok, err = pcall(function()
+    jarvis.scheduler.add({
+        id = "habit_water",
+        name = "Drink water",
+        schedule = "every 2 hours",
+        action = { type = "speak", text = "Попей воды." }
+    })
+end)
+if not ok then
+    jarvis.speak("Не получилось.")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+jarvis.speak("Каждые 2 часа буду напоминать пить воду.")
+jarvis.audio.play_ok()
+return { chain = false }