Fix build prod : Pinia CJS default import crash Node 22+

Pinia résout vers pinia.prod.cjs en production, Rollup convertit
require('vue') en default import ESM invalide. Script post-build
remplace par un namespace import (* as).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/fix-esm-imports.mjs

@@ -0,0 +1,35 @@
+/**
+ * Post-build fix: Pinia CJS (pinia.prod.cjs) fait require('vue').
+ * Rollup convertit ça en `import require$$0 from 'vue'` (default import).
+ * Vue 3 n'a pas de default export en ESM → crash Node 22+.
+ *
+ * Ce script remplace le default import par un namespace import valide.
+ */
+import { readFileSync, writeFileSync, existsSync } from 'node:fs'
+
+const file = '.output/server/chunks/build/server.mjs'
+
+if (!existsSync(file)) {
+  console.log('[fix-esm] server.mjs not found, skipping')
+  process.exit(0)
+}
+
+let code = readFileSync(file, 'utf-8')
+
+// Pattern: import require$$0, { defineComponent, inject, ... } from 'vue'
+// → import * as require$$0 from 'vue'; import { defineComponent, ... } from 'vue'
+const re = /import\s+(require\$\$\d+)\s*,\s*\{([^}]+)\}\s*from\s*'vue'/g
+let patched = false
+
+code = code.replace(re, (match, varName, namedStr) => {
+  patched = true
+  const names = namedStr.split(',').map(n => n.trim()).filter(Boolean)
+  return `import * as ${varName} from 'vue'; import { ${names.join(', ')} } from 'vue'`
+})
+
+if (patched) {
+  writeFileSync(file, code)
+  console.log('[fix-esm] Patched default import from vue in server.mjs')
+} else {
+  console.log('[fix-esm] No default import found, nothing to patch')
+}