feat: Network Matching page - AI-powered client connection suggestions

- New /network page with match cards, score badges, category filters
- Network stats dashboard (clients, matches, avg score, top connectors)
- Category-based filtering (industry, interests, location, business, social)
- Adjustable minimum score threshold
- AI introduction generation button per match
- Added Network to sidebar navigation
- Types: NetworkMatch, NetworkStats

src/lib/api.ts

@@ -239,6 +239,31 @@ class ApiClient {
     await this.fetch(`/emails/${id}`, { method: 'DELETE' });
   }
 
+  // Network Matching
+  async getNetworkMatches(params?: { minScore?: number; limit?: number }): Promise<{ matches: NetworkMatch[]; total: number; clientCount: number }> {
+    const searchParams = new URLSearchParams();
+    if (params?.minScore) searchParams.set('minScore', String(params.minScore));
+    if (params?.limit) searchParams.set('limit', String(params.limit));
+    const query = searchParams.toString();
+    return this.fetch(`/network/matches${query ? `?${query}` : ''}`);
+  }
+
+  async getClientMatches(clientId: string, minScore?: number): Promise<{ matches: NetworkMatch[]; client: { id: string; name: string } }> {
+    const query = minScore ? `?minScore=${minScore}` : '';
+    return this.fetch(`/network/matches/${clientId}${query}`);
+  }
+
+  async generateIntro(clientAId: string, clientBId: string, reasons: string[], provider?: string): Promise<{ introSuggestion: string }> {
+    return this.fetch('/network/intro', {
+      method: 'POST',
+      body: JSON.stringify({ clientAId, clientBId, reasons, provider }),
+    });
+  }
+
+  async getNetworkStats(): Promise<NetworkStats> {
+    return this.fetch('/network/stats');
+  }
+
   // Admin
   async getUsers(): Promise<User[]> {
     return this.fetch('/admin/users');