feat: implement comprehensive gamification, analytics, and leaderboard system

This commit adds a complete gamification system with analytics dashboards,
leaderboards, and enhanced badge tracking functionality.

Backend Features:
- Analytics API with overview, user stats, activity trends, top contributors,
  and street statistics endpoints
- Leaderboard API supporting global, weekly, monthly, and friends views
- Profile API for viewing and managing user profiles
- Enhanced gamification service with badge progress tracking and user stats
- Comprehensive test coverage for analytics and leaderboard endpoints
- Profile validation middleware for secure profile updates

Frontend Features:
- Analytics dashboard with multiple tabs (Overview, Activity, Personal Stats)
- Interactive charts for activity trends and street statistics
- Leaderboard component with pagination and timeframe filtering
- Badge collection display with progress tracking
- Personal stats component showing user achievements
- Contributors list for top performing users
- Profile management components (View/Edit)
- Toast notifications integrated throughout
- Comprehensive test coverage for Leaderboard component

Enhancements:
- User model enhanced with stats tracking and badge management
- Fixed express.Router() capitalization bug in users route
- Badge service improvements for better criteria matching
- Removed unused imports in Profile component

This feature enables users to track their contributions, view community
analytics, compete on leaderboards, and earn badges for achievements.

🤖 Generated with OpenCode

Co-Authored-By: AI Assistant <noreply@opencode.ai>

backend/routes/badges.js

@@ -4,6 +4,7 @@ const UserBadge = require("../models/UserBadge");
 const auth = require("../middleware/auth");
 const { asyncHandler } = require("../middleware/errorHandler");
 const { getUserBadgeProgress } = require("../services/gamificationService");
+const { getCacheMiddleware } = require("../middleware/cache");
 
 const router = express.Router();
 
@@ -13,8 +14,9 @@ const router = express.Router();
  */
 router.get(
   "/",
+  getCacheMiddleware(600), // 10 minute cache
   asyncHandler(async (req, res) => {
-    const badges = await Badge.find({ type: "badge" });
+    const badges = await Badge.findAll();
     // Sort by order and rarity in JavaScript since CouchDB doesn't support complex sorting
     badges.sort((a, b) => {
       if (a.order !== b.order) return a.order - b.order;
@@ -31,6 +33,7 @@ router.get(
 router.get(
   "/progress",
   auth,
+  getCacheMiddleware(600), // 10 minute cache
   asyncHandler(async (req, res) => {
     const progress = await getUserBadgeProgress(req.user.id);
     res.json(progress);
@@ -38,11 +41,12 @@ router.get(
 );
 
 /**
- * GET /api/badges/users/:userId
- * Get badges earned by a specific user
+ * GET /api/users/:userId/badges
+ * Get badges earned by a specific user with progress
  */
 router.get(
   "/users/:userId",
+  getCacheMiddleware(600), // 10 minute cache
   asyncHandler(async (req, res) => {
     const { userId } = req.params;
 
@@ -67,6 +71,7 @@ router.get(
  */
 router.get(
   "/:badgeId",
+  getCacheMiddleware(600), // 10 minute cache
   asyncHandler(async (req, res) => {
     const { badgeId } = req.params;