Add tool marketplace UI enhancements

- Browse all tools on page load without search
- Category filter dropdown (Text, Developer, Data, etc.)
- Sort options (downloads, rating, newest, name)
- Star ratings display in results table
- Clickable tags for filtering
- Installed indicator (✓) for local tools
- Update available indicator (↑) for newer versions
- Pagination controls for large result sets
- Publisher reputation info in details

Co-Authored-By: Claude Opus 4.5 <[email protected]>

README.md

@@ -431,9 +431,16 @@ The graphical interface provides a modern desktop experience:
 - Test tools before saving
 
 ### Registry Browser
-- Search community tools by name or keyword
-- View tool details, downloads, and ratings
-- One-click install to your local machine
+- **Browse all** tools on page load (no search required)
+- **Search** by name, description, or keyword
+- **Filter** by category (Text, Developer, Data, Other)
+- **Sort** by popularity, rating, newest, or name
+- **Star ratings** displayed in results and details
+- **Clickable tags** to filter by tag
+- **Installed indicator** (✓) shows which tools you have
+- **Update available** (↑) when newer version exists
+- **Pagination** for browsing large result sets
+- **Publisher info** showing reputation and total downloads
 
 ### Provider Management
 - Add and configure AI providers