FRE-592: Implement character database and relationship mapping

Add full character management system with enriched profiles (bio, traits,
arcs, motivation, conflict, secrets), relationship mapping between
characters with types and strength, character search/filter by role and
arc type, and character statistics (scene count, dialogue, screen time).

Includes database schema, tRPC router procedures, SolidJS components,
API hooks, and unit tests.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/lib/api/trpc-client.ts

@@ -0,0 +1,31 @@
+import { createTRPCClient, httpBatchLink } from '@trpc/client';
+import type { AppRouter } from '../../../server/trpc';
+
+// Create tRPC client
+export function createTRPCClientInstance(baseUrl: string = 'http://localhost:8080') {
+  return createTRPCClient<AppRouter>({
+    links: [
+      httpBatchLink({
+        url: `${baseUrl}/trpc`,
+        headers: () => {
+          // Add auth headers if available
+          const token = localStorage.getItem('auth_token');
+          return {
+            authorization: token ? `Bearer ${token}` : '',
+          };
+        },
+      }),
+    ],
+  });
+}
+
+// Helper for SSR
+export function createServerTRPCClient(baseUrl: string = 'http://localhost:8080') {
+  return createTRPCClient<AppRouter>({
+    links: [
+      httpBatchLink({
+        url: `${baseUrl}/trpc`,
+      }),
+    ],
+  });
+}