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>

server/trpc/index.ts

@@ -0,0 +1,41 @@
+import { initHTTPServer } from '@trpc/server/adapters/http';
+import { projectRouter } from './project-router';
+import type { TRPCContext } from './types';
+import type { TRPCError } from '@trpc/server';
+
+// App router combining all routers
+export const appRouter = {
+  project: projectRouter,
+};
+
+export type AppRouter = typeof appRouter;
+
+// Create tRPC HTTP server
+export function createTRPCServer(port: number = 8080) {
+  const server = initHTTPServer({
+    router: appRouter,
+    createContext: async ({ req }: { req: Request }): Promise<TRPCContext> => {
+      // Extract auth from headers
+      const authHeader = req.headers.get('authorization');
+      const userId = authHeader?.split(' ')[1]; // Bearer token
+      
+      return {
+        userId,
+      };
+    },
+    onError: ({ error, path, input }: { error: TRPCError; path: string; input: unknown }) => {
+      console.error(`tRPC error on ${path}:`, {
+        input,
+        error: error.message,
+      });
+    },
+  });
+
+  server.listen(port, () => {
+    console.log(`tRPC server listening on port ${port}`);
+  });
+
+  return server;
+}
+
+export default appRouter;