feat: complete search REST route, restore disk sync, and extraFields support across API/MCP

apps/web/app/api/search/route.ts

@@ -0,0 +1,71 @@
+import { NextRequest, NextResponse } from "next/server";
+import { keywordSearch, hybridSearch, semanticSearch } from "@mcpedia/core";
+
+// GET /api/search?q=...&mode=hybrid|keyword|semantic
+export async function GET(req: NextRequest) {
+  const { searchParams } = new URL(req.url);
+  const q = searchParams.get("q") ?? "";
+  const mode = searchParams.get("mode") ?? "hybrid";
+  const limit = Math.min(Math.max(Number(searchParams.get("limit") ?? 20), 1), 50);
+
+  if (!q.trim()) {
+    return NextResponse.json({ results: [] });
+  }
+
+  try {
+    if (mode === "keyword") {
+      const hits = await keywordSearch(q, limit);
+      return NextResponse.json({
+        results: hits.map((h) => ({
+          slug: h.doc.slug,
+          title: h.doc.title,
+          section: h.doc.section,
+          score: h.rank,
+          snippet: h.snippet,
+        })),
+      });
+    }
+
+    if (mode === "semantic") {
+      const hits = await semanticSearch(q, limit);
+      return NextResponse.json({
+        results: hits.map((h) => ({
+          slug: h.slug,
+          title: h.slug.split("/").pop() ?? h.slug,
+          section: h.slug.split("/")[0] ?? "docs",
+          score: h.score,
+          snippet: h.content.slice(0, 160),
+        })),
+      });
+    }
+
+    // Default: hybrid search
+    const hits = await hybridSearch(q, limit);
+    return NextResponse.json({
+      results: hits.map((h) => ({
+        slug: h.doc.slug,
+        title: h.doc.title,
+        section: h.doc.section,
+        score: h.rank,
+        snippet: h.snippet,
+      })),
+    });
+  } catch (err) {
+    console.error("Search API error:", err);
+    // Fall back to keyword search if embedding provider fails
+    try {
+      const hits = await keywordSearch(q, limit);
+      return NextResponse.json({
+        results: hits.map((h) => ({
+          slug: h.doc.slug,
+          title: h.doc.title,
+          section: h.doc.section,
+          score: h.rank,
+          snippet: h.snippet,
+        })),
+      });
+    } catch {
+      return NextResponse.json({ results: [], error: "Search failed" }, { status: 500 });
+    }
+  }
+}