build(dev): Add launch config and PORT-driven server binding

Track .claude/launch.json (dev/preview blueprint with autoPort) while
keeping the rest of .claude — notably worktrees/ — ignored. vite.config
now reads PORT from the env and pins server/preview to it with
strictPort, so tools like the launcher can hand a fixed port through.

Assisted-by: ClaudeCode:claude-opus-4-8

Author: Flowm

.claude/launch.json

@@ -2,10 +2,18 @@
   "version": "0.0.1",
   "configurations": [
     {
-      "name": "audiotrail-dev",
-      "runtimeExecutable": "npm",
+      "name": "dev",
+      "runtimeExecutable": "pnpm",
       "runtimeArgs": ["run", "dev"],
-      "port": 5173
+      "port": 5185,
+      "autoPort": true
+    },
+    {
+      "name": "preview",
+      "runtimeExecutable": "pnpm",
+      "runtimeArgs": ["run", "preview"],
+      "port": 5186,
+      "autoPort": true
     }
   ]
 }

.gitignore

@@ -5,3 +5,5 @@ coverage/
 .vite/
 *.local
 .DS_Store
+.claude/*
+!.claude/launch.json

vite.config.ts

@@ -11,6 +11,8 @@ import { VitePWA } from "vite-plugin-pwa";
 const buildDate = new Date().toISOString().replace(/\.\d{3}Z$/, "Z");
 const buildSha = execSync("git rev-parse --short HEAD").toString().trim();
 
+const port = process.env.PORT ? Number(process.env.PORT) : undefined;
+
 /**
  * Serves the developer's own gitignored sample takeout (data/Audible.zip)
  * at /__sample/Audible.zip during `vite serve` only. `apply: 'serve'` means
@@ -78,6 +80,8 @@ export default defineConfig({
       },
     }),
   ],
+  server: { port, strictPort: port !== undefined },
+  preview: { port, strictPort: port !== undefined },
   resolve: {
     tsconfigPaths: true,
   },