refactor: replace webpack context loading with dev server proxy

Remove the webpack-based file indexing strategy in favor of a proxy
approach. The dev server now proxies content requests to a local CLI
server, simplifying the data loading logic and removing webpack-specific
types and loaders.

rsbuild.config.ts

@@ -18,15 +18,6 @@ export default defineConfig({
       },
     },
     rspack: {
-      module: {
-        rules: [
-          {
-            test: /\.md|\.yarn|\.csv$/,
-            exclude: /\.schema\.csv$/,
-            type: "asset/source",
-          },
-        ],
-      },
       plugins: [
         process.env.ANALYZE ? new BundleAnalyzerPlugin() : undefined,
       ].filter(Boolean),
@@ -40,13 +31,18 @@ export default defineConfig({
       index: "./src/main.tsx",
     },
   },
+  server: {
+    proxy: {
+      // Proxy content API requests to the CLI dev server (npm run tttk)
+      "/__CONTENT_INDEX.json": "http://localhost:3000",
+      "/__COMPLETIONS.json": "http://localhost:3000",
+      "/content": "http://localhost:3000",
+      "/journal": "http://localhost:3000",
+    },
+  },
   output: {
     distPath: {
       root: "dist/web",
     },
-    copy:
-      process.env.NODE_ENV === "development"
-        ? [{ from: "./content", to: "content" }]
-        : [],
   },
 });