fix: address issues in model pull and chat API

- Refactored model pull logic to improve error handling and user feedback.
- Enhanced chat API to ensure better performance and reliability during message fetching.
- Updated UI components for a more intuitive user experience when interacting with models and messages.

data/models/llava.json

@@ -0,0 +1,32 @@
+{
+  "model": "llava",
+  "url": "https://ollama.com/library/llava",
+  "description": "🌋 LLaVA is a novel end-to-end trained large multimodal model that combines a vision encoder and Vicuna for general-purpose visual and language understanding. Updated to version 1.6.",
+  "variantsCount": 4,
+  "variants": [
+    {
+      "name": "llava:latest",
+      "size": "4.7GB",
+      "context": "32K",
+      "inputType": "Text, Image"
+    },
+    {
+      "name": "llava:7b",
+      "size": "4.7GB",
+      "context": "32K",
+      "inputType": "Text, Image"
+    },
+    {
+      "name": "llava:13b",
+      "size": "8.0GB",
+      "context": "4K",
+      "inputType": "Text, Image"
+    },
+    {
+      "name": "llava:34b",
+      "size": "20GB",
+      "context": "4K",
+      "inputType": "Text"
+    }
+  ]
+}