refactor(tools): search_projects uses shared score_project_match helper

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/fabledassistant/services/tools/projects.py

@@ -135,20 +135,12 @@ async def update_project_tool(*, user_id, arguments, **_ctx):
     briefing=True,
 )
 async def search_projects_tool(*, user_id, arguments, **_ctx):
-    from difflib import SequenceMatcher
-
     from fabledassistant.services.projects import list_projects
+    from fabledassistant.services.tools._helpers import score_project_match
 
-    query = str(arguments.get("query", "")).lower()
+    query = str(arguments.get("query", ""))
     projects = await list_projects(user_id)
-    scored: list[tuple[float, object]] = []
-    for p in projects:
-        combined = f"{p.title} {p.description or ''} {p.auto_summary or ''}".lower()
-        base_score = SequenceMatcher(None, query, combined).ratio()
-        query_words = set(query.split())
-        overlap = sum(1 for w in query_words if w in combined)
-        score = base_score + overlap * 0.05
-        scored.append((score, p))
+    scored: list[tuple[float, object]] = [(score_project_match(query, p), p) for p in projects]
     scored.sort(key=lambda x: x[0], reverse=True)
     results = []
     for score, p in scored[:5]: