fix(memos-local-openclaw): use limit and minScore query params in Viewer search API

Read limit and minScore from query params instead of ignoring them.
Use minScore as the semantic threshold instead of hardcoded 0.64.
Truncate results by limit and include both params in the response.

Fixes #1372

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: zerone0x

apps/memos-local-openclaw/src/viewer/server.ts

@@ -770,6 +770,9 @@ export class ViewerServer {
     const q = url.searchParams.get("q") ?? "";
     if (!q.trim()) { this.jsonResponse(res, { results: [], query: q }); return; }
 
+    const limit = Math.min(100, Math.max(1, Number(url.searchParams.get("limit")) || 20));
+    const minScore = Math.max(0.35, Math.min(1, Number(url.searchParams.get("minScore")) || 0.64));
+
     const role = url.searchParams.get("role") ?? undefined;
     const session = url.searchParams.get("session") ?? undefined;
     const owner = url.searchParams.get("owner") ?? undefined;
@@ -810,7 +813,7 @@ export class ViewerServer {
       }
     }
 
-    const SEMANTIC_THRESHOLD = 0.64;
+    const SEMANTIC_THRESHOLD = minScore;
     const VECTOR_TIMEOUT_MS = 8000;
     let vectorResults: any[] = [];
     let scoreMap = new Map<string, number>();
@@ -849,7 +852,7 @@ export class ViewerServer {
       if (!seenIds.has(r.id)) { seenIds.add(r.id); merged.push(r); }
     }
 
-    const results = merged.length > 0 ? merged : ftsResults.slice(0, 20);
+    const results = (merged.length > 0 ? merged : ftsResults.slice(0, limit)).slice(0, limit);
 
     this.store.recordViewerEvent("search");
     this.jsonResponse(res, {
@@ -858,6 +861,8 @@ export class ViewerServer {
       vectorCount: vectorResults.length,
       ftsCount: ftsResults.length,
       total: results.length,
+      limit,
+      minScore,
     });
   }