Rename castle-app to libra-app

Match the upstream LNbits extension rebrand (Castle Accounting → Libra).
Renames the standalone PWA build artifacts and all references:

- castle.html → libra.html
- vite.castle.config.ts → vite.libra.config.ts (PWA name "Libra —
  Team Accounting", short_name "Libra", manifest id libra-accounting)
- npm scripts: build:castle/dev:castle/preview:castle → build:libra
  etc; dev:all and build:demo chains updated; dist-castle → dist-libra
- Hub tile: Lucide icon Castle → Scale (the scales/balance metaphor),
  label "Castle" → "Libra", env var VITE_HUB_CASTLE_URL → VITE_HUB_LIBRA_URL
- ExpensesAPI: /castle/api/v1/* → /libra/api/v1/* (matches the renamed
  LNbits extension's URL prefix)
- Feature flags VITE_CASTLE_INCOME_ENABLED/VITE_CASTLE_BUDGETS_ENABLED →
  VITE_LIBRA_*
- i18n: top-level "castle" namespace → "libra" across en/es/fr; all
  t('castle.*') usages updated
- localStorage key castle-expense-drafts → libra-expense-drafts
- nginx.conf.example: /castle/ routes + castle.<domain> redirect → libra
- Comments and identifiers: castleOwesUser → libraOwesUser, castle.api
  references in docs

Source dir src/accounting-app/ stays as-is (already feature-named, not
brand-named).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

vite.libra.config.ts

@@ -0,0 +1,136 @@
+import { fileURLToPath, URL } from 'node:url'
+import vue from '@vitejs/plugin-vue'
+import tailwindcss from '@tailwindcss/vite'
+import { defineConfig, type Plugin } from 'vite'
+import { VitePWA } from 'vite-plugin-pwa'
+import { ViteImageOptimizer } from 'vite-plugin-image-optimizer'
+import { visualizer } from 'rollup-plugin-visualizer'
+
+/**
+ * Plugin to rewrite dev server requests to libra.html
+ * (SPA fallback for the standalone Libra accounting app entry point)
+ */
+function libraHtmlPlugin(): Plugin {
+  return {
+    name: 'libra-html-rewrite',
+    configureServer(server) {
+      server.middlewares.use((req, _res, next) => {
+        // Rewrite all non-asset requests to libra.html.
+        // Strip query before checking for an extension — JWTs (e.g. ?token=...)
+        // contain dots and would otherwise get mistaken for an asset request.
+        const path = req.url ? req.url.split('?')[0] : ''
+        if (
+          req.url &&
+          !req.url.startsWith('/@') &&
+          !req.url.startsWith('/src/') &&
+          !req.url.startsWith('/node_modules/') &&
+          !path.includes('.')
+        ) {
+          req.url = '/libra.html'
+        }
+        next()
+      })
+    },
+  }
+}
+
+/**
+ * Vite config for the standalone Libra accounting app.
+ *
+ * Set VITE_BASE_PATH to deploy under a path prefix:
+ *   VITE_BASE_PATH=/libra/ → app.ariege.io/libra/ (shared auth)
+ *   (default: /)            → libra.ariege.io (standalone subdomain)
+ */
+export default defineConfig(({ mode }) => ({
+  base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-libra',
+  server: {
+    port: 5180,
+    strictPort: true,
+  },
+  plugins: [
+    libraHtmlPlugin(),
+    vue(),
+    tailwindcss(),
+    VitePWA({
+      registerType: 'autoUpdate',
+      devOptions: {
+        enabled: false,
+      },
+      workbox: {
+        globPatterns: ['**/*.{js,css,html,ico,png,svg}'],
+        navigateFallback: 'libra.html',
+        navigateFallbackAllowlist: [
+          new RegExp(`^${(process.env.VITE_BASE_PATH || '/').replace(/[.*+?^${}()|[\]\\]/g, '\\$&')}`),
+        ],
+      },
+      includeAssets: [
+        'favicon.ico',
+        'apple-touch-icon.png',
+        'mask-icon.svg',
+        'icon-192.png',
+        'icon-512.png',
+        'icon-maskable-192.png',
+        'icon-maskable-512.png',
+      ],
+      manifest: {
+        name: 'Libra — Team Accounting',
+        short_name: 'Libra',
+        description: 'Team accounting and expense management',
+        theme_color: '#1f2937',
+        background_color: '#ffffff',
+        display: 'standalone',
+        orientation: 'portrait-primary',
+        start_url: process.env.VITE_BASE_PATH || '/',
+        scope: process.env.VITE_BASE_PATH || '/',
+        id: 'libra-accounting',
+        categories: ['finance', 'business', 'productivity'],
+        lang: 'en',
+        icons: [
+          { src: 'icon-192.png', sizes: '192x192', type: 'image/png', purpose: 'any' },
+          { src: 'icon-512.png', sizes: '512x512', type: 'image/png', purpose: 'any' },
+          { src: 'icon-maskable-192.png', sizes: '192x192', type: 'image/png', purpose: 'maskable' },
+          { src: 'icon-maskable-512.png', sizes: '512x512', type: 'image/png', purpose: 'maskable' },
+        ],
+      },
+    }),
+    ViteImageOptimizer({
+      jpg: { quality: 80 },
+      png: { quality: 80 },
+      webp: { lossless: true },
+    }),
+    mode === 'analyze' &&
+      visualizer({
+        open: true,
+        filename: 'dist-libra/stats.html',
+        gzipSize: true,
+        brotliSize: true,
+      }),
+  ],
+  resolve: {
+    alias: {
+      // ORDER MATTERS — @rollup/plugin-alias is first-match-wins.
+      // The more specific @/app.config remap must precede the @ prefix
+      // alias, otherwise '@/app.config' matches '@' first and resolves
+      // to ./src/app.config (the hub config). ExpensesAPI etc. import
+      // from @/app.config and need the per-app config.
+      '@/app.config': fileURLToPath(new URL('./src/accounting-app/app.config.ts', import.meta.url)),
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+    },
+  },
+  build: {
+    outDir: 'dist-libra',
+    rollupOptions: {
+      input: 'libra.html',
+      output: {
+        manualChunks: {
+          'vue-vendor': ['vue', 'vue-router', 'pinia'],
+          'ui-vendor': ['radix-vue', '@vueuse/core'],
+          'shadcn': ['class-variance-authority', 'clsx', 'tailwind-merge'],
+        },
+      },
+    },
+    chunkSizeWarningLimit: 1000,
+  },
+}))