Improve model status indicators and tune timeouts

Green/red emoji circles replace Unicode symbols for at-a-glance model
readiness. Increase connect timeouts (10→30s) for cold model loading,
warm timeout (120→300s) for large models, and pull timeout (600→1800s)
to match route-level limit. Show error toast on SSE reconnection failure
instead of silently recovering.

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

src/fabledassistant/routes/chat.py

@@ -269,7 +269,7 @@ async def warm_model_route():
 
     async def _warm():
         try:
-            async with httpx.AsyncClient(timeout=120.0) as client:
+            async with httpx.AsyncClient(timeout=300.0) as client:
                 await client.post(
                     f"{Config.OLLAMA_URL}/api/generate",
                     json={"model": model, "prompt": "", "keep_alive": "30m"},

src/fabledassistant/services/llm.py

@@ -54,7 +54,7 @@ async def ensure_model(model: str) -> None:
 
     logger.info("Pulling model '%s' from Ollama...", model)
     try:
-        async with httpx.AsyncClient(timeout=600.0) as client:
+        async with httpx.AsyncClient(timeout=1800.0) as client:
             async with client.stream(
                 "POST",
                 f"{Config.OLLAMA_URL}/api/pull",
@@ -80,7 +80,7 @@ async def stream_chat(
     payload: dict = {"model": model, "messages": messages, "stream": True}
     if options:
         payload["options"] = options
-    async with httpx.AsyncClient(timeout=httpx.Timeout(1800.0, connect=10.0, read=300.0)) as client:
+    async with httpx.AsyncClient(timeout=httpx.Timeout(1800.0, connect=30.0, read=300.0)) as client:
         async with client.stream(
             "POST",
             f"{Config.OLLAMA_URL}/api/chat",
@@ -100,7 +100,7 @@ async def stream_chat(
 
 async def generate_completion(messages: list[dict], model: str) -> str:
     """Non-streaming chat completion, returns full response text."""
-    async with httpx.AsyncClient(timeout=httpx.Timeout(1800.0, connect=10.0, read=300.0)) as client:
+    async with httpx.AsyncClient(timeout=httpx.Timeout(1800.0, connect=30.0, read=300.0)) as client:
         resp = await client.post(
             f"{Config.OLLAMA_URL}/api/chat",
             json={"model": model, "messages": messages, "stream": False},