feat: Plan 4 — Dashboard Statistik + Gap Analysis

- Add /dashboard route (all authenticated roles)
- Add dashboard view with Chart.js 4.4:
  - 4 stat cards (ibadah, miskin, jiwa, % terjangkau)
  - Donut chart: ibadah per jenis
  - Horizontal bar chart: miskin per kondisi rumah
  - Gap Analysis: Turf.js coverage computation, doughnut chart,
    per-ibadah coverage table sorted by KK count, uncovered family list
  - esc() helper applied to all user-data innerHTML
- Add Dashboard nav link to map, data, and admin views
- 5 new tests: unauthenticated redirect + all 4 roles can access
- Mark K-02 and K-03 complete in missing_features.md
- Update README with new page and feature section

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

resources/views/map.blade.php

@@ -88,6 +88,11 @@
                         <i class="fa-solid fa-table-list"></i> Data Tabular
                     </a>
                 </li>
+                <li>
+                    <a href="{{ url('/dashboard') }}" class="font-medium">
+                        <i class="fa-solid fa-chart-bar"></i> Dashboard
+                    </a>
+                </li>
                 @if(auth()->user()->hasRole('administrator'))
                 <li>
                     <a href="{{ url('/admin/users') }}" class="font-medium">