chore: extract ShareServer into its own repository

Move the existing Hono API, React console, tests, build configuration,
and feature documentation from GoodBuddy into a standalone project.
Keep the current interactive-prototype behavior and production limitations.

Document the source commit and sibling-checkout links to the authoritative
Desktop network architecture. Independent install, tests, typecheck, lint,
build, and built-service HTTP smoke checks passed.

vite.config.ts

@@ -0,0 +1,18 @@
+import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  plugins: [react(), tailwindcss()],
+  server: {
+    port: 5174,
+    proxy: {
+      '/api': 'http://127.0.0.1:8787'
+    }
+  },
+  test: {
+    environment: 'jsdom',
+    setupFiles: ['./src/test-setup.ts'],
+    exclude: ['build-server/**', 'dist/**', 'node_modules/**']
+  }
+})