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/olmo2.json

@@ -0,0 +1,26 @@
+{
+  "model": "olmo2",
+  "url": "https://ollama.com/library/olmo2",
+  "description": "OLMo 2 is a new family of 7B and 13B models trained on up to 5T tokens. These models are on par with or better than equivalently sized fully open models, and competitive with open-weight models such as Llama 3.1 on English academic benchmarks.",
+  "variantsCount": 3,
+  "variants": [
+    {
+      "name": "olmo2:latest",
+      "size": "4.5GB",
+      "context": "4K",
+      "inputType": "Text"
+    },
+    {
+      "name": "olmo2:7b",
+      "size": "4.5GB",
+      "context": "4K",
+      "inputType": "Text"
+    },
+    {
+      "name": "olmo2:13b",
+      "size": "8.4GB",
+      "context": "4K",
+      "inputType": "Text"
+    }
+  ]
+}