Add contributing guidelines, feature flag utilities, and route integrity tests

frontend/src/config/routes.ts

@@ -0,0 +1,71 @@
+/**
+ * Canonical route registry — single source of truth for all application routes.
+ *
+ * SAFETY RULE: Never remove a route from this list.
+ * New routes may only be appended. The route safety test
+ * (routes.test.ts) will fail if any existing route is deleted.
+ */
+
+// ─── Page routes ─────────────────────────────────────────────────
+export const PAGE_ROUTES = [
+  '/',
+  '/about',
+  '/account',
+  '/forgot-password',
+  '/reset-password',
+  '/privacy',
+  '/terms',
+  '/contact',
+] as const;
+
+// ─── Tool routes ─────────────────────────────────────────────────
+export const TOOL_ROUTES = [
+  // PDF Tools
+  '/tools/pdf-to-word',
+  '/tools/word-to-pdf',
+  '/tools/compress-pdf',
+  '/tools/merge-pdf',
+  '/tools/split-pdf',
+  '/tools/rotate-pdf',
+  '/tools/pdf-to-images',
+  '/tools/images-to-pdf',
+  '/tools/watermark-pdf',
+  '/tools/protect-pdf',
+  '/tools/unlock-pdf',
+  '/tools/page-numbers',
+  '/tools/pdf-editor',
+  '/tools/pdf-flowchart',
+  '/tools/pdf-to-excel',
+  '/tools/remove-watermark-pdf',
+  '/tools/reorder-pdf',
+  '/tools/extract-pages',
+
+  // Image Tools
+  '/tools/image-converter',
+  '/tools/image-resize',
+  '/tools/compress-image',
+  '/tools/ocr',
+  '/tools/remove-background',
+
+  // Convert Tools
+  '/tools/html-to-pdf',
+
+  // AI Tools
+  '/tools/chat-pdf',
+  '/tools/summarize-pdf',
+  '/tools/translate-pdf',
+  '/tools/extract-tables',
+
+  // Other Tools
+  '/tools/qr-code',
+  '/tools/video-to-gif',
+  '/tools/word-counter',
+  '/tools/text-cleaner',
+] as const;
+
+// ─── All routes combined ─────────────────────────────────────────
+export const ALL_ROUTES = [...PAGE_ROUTES, ...TOOL_ROUTES] as const;
+
+export type PageRoute = (typeof PAGE_ROUTES)[number];
+export type ToolRoute = (typeof TOOL_ROUTES)[number];
+export type AppRoute = (typeof ALL_ROUTES)[number];