feat(ollama): enhance model pull with improved error handling, persistence, and UI

- Add catalog metadata lookup for better error messages with hints (e.g., for missing manifests or tags)
- Persist downloaded model references in saved remote models for future reuse
- Replace searchRemoteModels import with getSavedRemoteModels in search route
- Enhance pull progress UI to display download bytes, digest, and fallback message when data is unavailable
- Improve error payload with model details, URL, and tags count to guide users toward valid tags or models

database/user-remote-models.json

@@ -0,0 +1,9 @@
+{
+  "models": [
+    {
+      "name": "goonsai/josiefied-qwen2.5-7b-abliterated-v2:latest",
+      "installed": true,
+      "lastUsedAt": "2025-10-29T20:40:19.434Z"
+    }
+  ]
+}