feat: bug statistics + village detail dashboard enhancement

- Tambah GET /api/bugs/stats dengan summary cards & chart trend/bugs per app
- Tambah date range picker di village activity chart
- Tambah tabel Recent Activity (action + description) di village detail
- Update API graph-log-villages support dateFrom/dateTo custom range

src/app.ts

@@ -1100,6 +1100,88 @@ export function createApp() {
       },
     })
 
+    // ─── Bug Statistics API ────────────────────────────
+    .get('/api/bugs/stats', async ({ query }) => {
+      const range = [7, 30, 90].includes(Number(query.range)) ? Number(query.range) : 7
+      const now = new Date()
+      const rangeStart = new Date(now.getTime() - range * 24 * 60 * 60 * 1000)
+
+      const [totalBugs, openBugs, statusGroups, appGroups, sourceGroups, resolvedBugs, trendData] = await Promise.all([
+        prisma.bug.count(),
+        prisma.bug.count({ where: { status: 'OPEN' } }),
+        prisma.bug.groupBy({ by: ['status'], _count: { id: true } }),
+        prisma.bug.groupBy({ by: ['appId'], _count: { id: true } }),
+        prisma.bug.groupBy({ by: ['source'], _count: { id: true } }),
+        prisma.bug.findMany({
+          where: { status: { in: ['RESOLVED', 'CLOSED'] } },
+          select: { createdAt: true, updatedAt: true },
+        }),
+        prisma.bug.findMany({
+          where: { createdAt: { gte: rangeStart } },
+          select: { createdAt: true },
+          orderBy: { createdAt: 'asc' },
+        }),
+      ])
+
+      const byStatus = Object.fromEntries(statusGroups.map((g) => [g.status, g._count.id]))
+      const byApp = appGroups.map((g) => ({ appId: g.appId, count: g._count.id }))
+      const bySource = Object.fromEntries(sourceGroups.map((g) => [g.source, g._count.id]))
+
+      const totalResolutionMs = resolvedBugs.reduce((sum, b) => sum + (b.updatedAt.getTime() - b.createdAt.getTime()), 0)
+      const avgResolutionHours = resolvedBugs.length > 0
+        ? Math.round(totalResolutionMs / resolvedBugs.length / (1000 * 60 * 60) * 10) / 10
+        : 0
+
+      const resolvedCount = (byStatus['RESOLVED'] || 0) + (byStatus['CLOSED'] || 0)
+      const resolutionRate = totalBugs > 0 ? Math.round((resolvedCount / totalBugs) * 100) : 0
+
+      const months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
+      const trendMap: Record<string, number> = {}
+      const keyToLabel: Record<string, string> = {}
+
+      for (let i = 0; i < range; i++) {
+        const d = new Date(now)
+        d.setDate(d.getDate() - i)
+        const key = d.toISOString().slice(0, 10)
+        const label = `${d.getDate()} ${months[d.getMonth()]}`
+        keyToLabel[key] = label
+        trendMap[key] = 0
+      }
+      for (const b of trendData) {
+        const key = b.createdAt.toISOString().slice(0, 10)
+        if (key in trendMap) trendMap[key]++
+      }
+      const trend: { date: string; count: number }[] = []
+      for (let i = 0; i < range; i++) {
+        const d = new Date(now)
+        d.setDate(d.getDate() - i)
+        const key = d.toISOString().slice(0, 10)
+        trend.push({ date: keyToLabel[key] ?? key, count: trendMap[key] ?? 0 })
+      }
+      trend.reverse()
+
+      return {
+        totalBugs,
+        openBugs,
+        byStatus,
+        byApp,
+        bySource,
+        avgResolutionHours,
+        resolutionRate,
+        trend,
+        range,
+      }
+    }, {
+      query: t.Object({
+        range: t.Optional(t.String({ description: 'Rentang hari: 7, 30, atau 90 (default: 30)' })),
+      }),
+      detail: {
+        summary: 'Bug Statistics',
+        description: 'Statistik bug: total, distribusi status, per app, per source, avg resolution time, dan trend.',
+        tags: ['Bugs'],
+      },
+    })
+
     // ─── System Status API ─────────────────────────────
     .get('/api/system/status', async () => {
       try {