feat: add /api/dashboard endpoint with hero match, stats, streak, nudges

Returns next tippable match (hero), user rank/points from leaderboard,
consecutive-tip streak, and up to 3 contextual nudges in one request.
Mounts at /api/dashboard; adds getDashboard() + DashboardData type to
the frontend API client.

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

backend/src/routes/dashboard.ts

@@ -0,0 +1,123 @@
+import { Router, Request, Response } from 'express';
+import { query } from '../db/client';
+import { logger } from '../services/logger';
+
+const router = Router();
+
+router.get('/', async (req: Request, res: Response): Promise<void> => {
+  const userId = req.staffbaseUser?.sub;
+  if (!userId) {
+    res.status(401).json({ error: 'Unauthorized' });
+    return;
+  }
+
+  try {
+    // 1. Hero: next upcoming match
+    const heroResult = await query<any>(
+      `SELECT m.id, m.utc_date, m.status,
+              m.home_team_name, m.home_team_short, m.home_team_crest,
+              m.away_team_name, m.away_team_short, m.away_team_crest,
+              t.tip_home, t.tip_away,
+              EXTRACT(EPOCH FROM (m.utc_date - NOW())) / 60 AS minutes_until
+       FROM matches m
+       LEFT JOIN tips t ON t.match_id = m.id AND t.user_id = $1
+       WHERE m.status IN ('SCHEDULED', 'TIMED')
+       ORDER BY m.utc_date ASC
+       LIMIT 1`,
+      [userId]
+    );
+
+    const h = heroResult[0];
+    const hero = h ? {
+      match: {
+        id: h.id,
+        homeTeam: { name: h.home_team_name, shortName: h.home_team_short, crest: h.home_team_crest },
+        awayTeam: { name: h.away_team_name, shortName: h.away_team_short, crest: h.away_team_crest },
+        utcDate: h.utc_date,
+        status: h.status,
+        minutesUntilKickoff: Math.round(parseFloat(h.minutes_until)),
+      },
+      userTip: h.tip_home != null ? { home: h.tip_home, away: h.tip_away } : null,
+      tippable: parseFloat(h.minutes_until) > 5,
+    } : null;
+
+    // 2. Stats from leaderboard
+    const statsResult = await query<any>(
+      `SELECT rank, total_points FROM leaderboard WHERE user_id = $1`,
+      [userId]
+    );
+    const s = statsResult[0];
+
+    // 3. Streak: consecutive tipped matches (most recent backward)
+    const pastMatches = await query<{ has_tip: boolean }>(
+      `SELECT CASE WHEN t.id IS NOT NULL THEN true ELSE false END AS has_tip
+       FROM matches m
+       LEFT JOIN tips t ON t.match_id = m.id AND t.user_id = $1
+       WHERE m.utc_date <= NOW() AND m.status IN ('FINISHED', 'IN_PLAY')
+       ORDER BY m.utc_date DESC`,
+      [userId]
+    );
+    let streak = 0;
+    for (const m of pastMatches) {
+      if (m.has_tip) streak++;
+      else break;
+    }
+
+    // 4. Nudges
+    const nudges: Array<{ type: string; text: string; matchId?: number }> = [];
+
+    const untipped = await query<{ count: string }>(
+      `SELECT COUNT(*) AS count FROM matches m
+       LEFT JOIN tips t ON t.match_id = m.id AND t.user_id = $1
+       WHERE m.utc_date::date = CURRENT_DATE
+         AND m.status IN ('SCHEDULED', 'TIMED')
+         AND t.id IS NULL`,
+      [userId]
+    );
+    const untippedCount = parseInt(untipped[0]?.count || '0');
+    if (untippedCount > 0) {
+      nudges.push({
+        type: 'untipped',
+        text: `📅 Heute noch ${untippedCount} ${untippedCount === 1 ? 'Spiel' : 'Spiele'} ohne Tipp`,
+      });
+    }
+
+    const leader = await query<{ full_name: string; total_points: string }>(
+      `SELECT full_name, total_points FROM leaderboard ORDER BY rank ASC LIMIT 1`
+    );
+    if (leader[0]) {
+      nudges.push({ type: 'leader', text: `🏆 ${leader[0].full_name} führt mit ${leader[0].total_points} Punkten` });
+    }
+
+    const latest = await query<any>(
+      `SELECT m.home_team_short, m.away_team_short, m.score_home, m.score_away, t.points, m.id AS match_id
+       FROM tips t JOIN matches m ON m.id = t.match_id
+       WHERE t.user_id = $1 AND t.points IS NOT NULL
+       ORDER BY m.utc_date DESC LIMIT 1`,
+      [userId]
+    );
+    if (latest[0]) {
+      const r = latest[0];
+      nudges.push({
+        type: 'result',
+        text: `🎯 Letzte Auswertung: ${r.points} Punkte für ${r.home_team_short} ${r.score_home}:${r.score_away} ${r.away_team_short}`,
+        matchId: r.match_id,
+      });
+    }
+
+    res.json({
+      hero,
+      stats: {
+        rank: s ? parseInt(s.rank) : null,
+        totalPoints: s ? parseInt(s.total_points) : 0,
+        streak,
+      },
+      nudges,
+    });
+  } catch (error) {
+    logger.error('Dashboard failed', { error });
+    res.status(500).json({ error: 'Internal server error' });
+  }
+});
+
+export default router;