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

lib/ollama.ts

@@ -188,6 +188,8 @@ export async function searchRemoteModels(query?: string): Promise<any[]> {
     return filtered.map((m) => ({
       name: m.name,
       description: m.description,
+      url: m.url,
+      tags_count: m.tags_count,
       installed: installedNames.has(m.name),
       remote: true,
     }));