fix: Update vizApp to use bm25_hybrid algorithm and remove deprecated weights

The visualization UI was still using the old 'hybrid' algorithm name and
weight parameters that were replaced by the BM25 hybrid search refactor.
This caused "Unknown algorithm: hybrid" errors when using the search
& visualize feature.

Changes:
- Update default algorithm from 'hybrid' to 'bm25_hybrid'
- Update default scoreThreshold from 0.7 to 0.0 to match backend
- Remove deprecated semanticWeight, keywordWeight, fuzzyWeight parameters
- Remove weight parameters from search request

Fixes the visualization search functionality after BM25 hybrid refactor.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

nextcloud_mcp_server/auth/userinfo_routes.py

@@ -676,14 +676,11 @@ async def user_info_html(request: Request) -> HTMLResponse:
             function vizApp() {{
                 return {{
                     query: '',
-                    algorithm: 'hybrid',
+                    algorithm: 'bm25_hybrid',
                     showAdvanced: false,
                     docTypes: [''],  // Default to "All Types"
                     limit: 50,
-                    scoreThreshold: 0.7,
-                    semanticWeight: 0.5,
-                    keywordWeight: 0.3,
-                    fuzzyWeight: 0.2,
+                    scoreThreshold: 0.0,
                     loading: false,
                     results: [],
 
@@ -697,9 +694,6 @@ async def user_info_html(request: Request) -> HTMLResponse:
                                 algorithm: this.algorithm,
                                 limit: this.limit,
                                 score_threshold: this.scoreThreshold,
-                                semantic_weight: this.semanticWeight,
-                                keyword_weight: this.keywordWeight,
-                                fuzzy_weight: this.fuzzyWeight,
                             }});
 
                             // Add doc_types parameter (filter out empty string for "All Types")