Add a global search feature to find articles and videos

Introduces a global search functionality with a dedicated search page and integrates a search icon/input into the header and mobile menu. The search queries articles by title, excerpt, and content, and videos by title and description. Updates are made to `App.tsx` to include the new route, and `header.tsx` to implement the search UI and logic.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 517dfa7b-26ac-463d-a6e1-a58c6df97188
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Replit-Commit-Event-Id: 90e58e4e-8d41-41e7-bc45-74196314bd78
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/f209e72a-0939-48fa-84fc-57854de71967/517dfa7b-26ac-463d-a6e1-a58c6df97188/jdAEdU5
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server/routes.ts

@@ -90,6 +90,50 @@ export async function registerRoutes(
     res.json(articles);
   });
 
+  app.get("/api/search", async (req, res) => {
+    const q = (req.query.q as string || "").trim().toLowerCase();
+    if (!q || q.length < 2) return res.json({ articles: [], videos: [] });
+
+    try {
+      const articles = await storage.getArticles();
+      const matchedArticles = articles.filter(a =>
+        a.title.toLowerCase().includes(q) ||
+        a.excerpt.toLowerCase().includes(q) ||
+        a.content.replace(/<[^>]+>/g, "").toLowerCase().includes(q) ||
+        a.category.toLowerCase().includes(q)
+      ).slice(0, 10);
+
+      const cacheKey = `videos_1_100_`;
+      let videos: any[] = [];
+      const cached = getCached<any>(cacheKey, 30 * 60 * 1000);
+      if (cached) {
+        videos = cached.items || [];
+      } else {
+        try {
+          const data = await bunnyFetch(`/library/${LIBRARY_ID}/videos?page=1&itemsPerPage=100&orderBy=date`);
+          videos = (data.items || []).map((v: any) => {
+            const descTag = (v.metaTags || []).find((t: any) => t.property === "description");
+            return {
+              guid: v.guid,
+              title: (v.title || "").replace(/\.mp4$/i, ""),
+              description: descTag?.value || v.description || "",
+              thumbnail: `https://${CDN_HOST}/${v.guid}/${v.thumbnailFileName || "thumbnail.jpg"}`,
+              embedUrl: `https://player.mediadelivery.net/embed/${LIBRARY_ID}/${v.guid}`,
+            };
+          });
+        } catch {}
+      }
+      const matchedVideos = videos.filter((v: any) =>
+        v.title.toLowerCase().includes(q) ||
+        (v.description || "").toLowerCase().includes(q)
+      ).slice(0, 10);
+
+      res.json({ articles: matchedArticles, videos: matchedVideos });
+    } catch (err: any) {
+      res.status(500).json({ message: err.message });
+    }
+  });
+
   app.get("/api/articles/:slug", async (req, res) => {
     const article = await storage.getArticleBySlug(req.params.slug);
     if (!article) {