Initial commit: Bun · Hono · React SPA · Postgres/Drizzle template

The starting point for an app with a React frontend. Same server, env,
database and API skeleton as template-htmx — the two differ only in what is
served at / — with a React 19 SPA, Tailwind v4 and shadcn/ui on top.

Carried from a working project rather than designed in the abstract, and
carrying the lessons that cost it time:

- The dev script states NODE_ENV=development rather than inheriting it. React
  resolves its runtime against NODE_ENV: Bun emits jsxDEV() in development
  and React's production jsx-dev-runtime defines jsxDEV as void 0. Inherit
  production while transforming for development and the app dies at first
  paint. Verified: the dev bundle resolves the development runtime and
  contains no void-0 stub.
- Asset URLs in components are relative and <base href="/"> is in the HTML,
  so a path-prefix proxy can rewrite one attribute and every asset follows. A
  test enforces it.
- Routing is in the hash, because the app may be mounted under a prefix it
  only learns at runtime and a hash means the same thing at either mount.
- index.html holds __PUBLIC_URL__ and gen-index.ts substitutes it, because
  Bun's HTML bundler fails the build on a root-relative favicon href.
- APP_ENV failing closed, env files before the ambient environment, the
  database enforced by name, one Postgres client per process — as in the
  htmx template.

The database has no tables. The App is a shell with one tab and no features,
named as a placeholder. Renaming `app` is the first step and the README lists
every place it appears.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,47 @@
+{
+  "compilerOptions": {
+    "lib": [
+      "ESNext",
+      "DOM"
+    ],
+    "target": "ESNext",
+    "module": "Preserve",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+    "types": [
+      "bun",
+      "react"
+    ],
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+    "paths": {
+      "@/*": [
+        "./src/apps/frontend/*"
+      ],
+      "appdb": [
+        "./src/databases/app_db/src/index.ts"
+      ],
+      "appdb/*": [
+        "./src/databases/app_db/src/*"
+      ],
+      "@/public/*": [
+        "./public/*"
+      ]
+    },
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  },
+  "exclude": [
+    "dist",
+    "node_modules"
+  ]
+}