Enhance comment seeding and search functionality

- Updated the `seedComments` function to return an array of published comment event IDs for tracking.
- Introduced `seedCommentReactions` to seed upvotes and downvotes on comments, improving interaction visibility.
- Enhanced the `App.vue` and `MobileNav.vue` components to support a mobile search overlay, allowing users to search films seamlessly.
- Added a new `MobileSearch` component for better search experience on mobile devices.
- Implemented a search feature in `AppHeader.vue` with dropdown results for improved content discovery.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/stores/searchSelection.ts

@@ -0,0 +1,23 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import type { Content } from '../types/content'
+
+/**
+ * Lightweight store to bridge search result selection
+ * from the header/mobile search to Browse.vue's detail modal.
+ */
+export const useSearchSelectionStore = defineStore('searchSelection', () => {
+  const pendingContent = ref<Content | null>(null)
+
+  function select(content: Content) {
+    pendingContent.value = content
+  }
+
+  function consume(): Content | null {
+    const content = pendingContent.value
+    pendingContent.value = null
+    return content
+  }
+
+  return { pendingContent, select, consume }
+})