Add blind-index search layer; fix captain detail 200-with-empty-body

Searching encrypted columns currently works only because encryptData() is
AES-CBC with a fixed IV, i.e. deterministic. That determinism is what leaks
equality and shared prefixes, and it is why moving storage to AES-GCM would
break every lookup. This separates the two concerns.

- core/Security/BlindIndex.php: HMAC-SHA256 over a normalised value, keyed by
  a secret pepper. Phone numbers have a small keyspace, so a bare SHA-256
  would be reversible by enumeration; the pepper lives in the environment, not
  the database. The scope string includes table and field so the same number
  does not produce a matching index across tables.
  Normalisation unifies local/international phone forms, lowercases emails and
  folds Arabic alef/ya/ta-marbuta and diacritics for names.
- migrations/: nullable *_bidx columns plus indexes, and the missing
  adminUser.status/approved_by/approved_at columns that admin approvals need.
- scripts/backfill_blind_index.php: restartable, batched, --dry-run capable,
  touches only index columns.
- Admin lookups by phone/email now match the index, keeping the old ciphertext
  comparison in the same query so search keeps working until the backfill runs.
  bootstrap exposes $blindIndex as null when no pepper is configured.

Also: AdminCaptain/getCaptainDetailsById.php selected driver.education, a
column absent from this schema. The PDOException was uncaught, so the client
received an empty body with HTTP 200 — the "non-JSON response" seen when
opening a captain. It now omits the column, catches the error, reports it as
JSON, and requires an admin role.

Console: opening any sidebar section refetches its data instead of showing
what was loaded when the console started.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

dashboard/siro-admin/js/app.js

@@ -11,7 +11,7 @@
   // Bump together with the ?v= query in index.html. Shown in the UI and in the
   // diagnostics report so "the deploy did nothing" can be answered with a fact
   // rather than a guess about caching.
-  const BUILD = '2026-07-25-6';
+  const BUILD = '2026-07-25-7';
 
   // ── Localisation ─────────────────────────────────────────────────────────
   // Arabic is the operators' language; English is kept because several screens
@@ -2815,15 +2815,44 @@
         if (window.innerWidth <= 992) el.sidebar.classList.remove('open');
         redrawCharts();
 
-        const mod = MODULES.find((m) => m.id === item.dataset.module);
-        if (mod && session) loadModule(mod);
+        // Opening a section always refetches it: an operator switching to a
+        // list expects what the database holds now, not what it held when the
+        // console was first opened.
+        if (session) refreshView(item.dataset.view, item.dataset.module);
       });
     });
     el.toggleSidebar?.addEventListener('click', () => el.sidebar.classList.toggle('open'));
   }
 
+
+  // Maps a sidebar entry to the loader that owns its data.
+  const VIEW_LOADERS = {
+    dashboardView: () => { loadStats().catch(() => {}); loadRidesTrend().catch(() => {}); },
+    ridesView: () => loadRides().catch(() => {}),
+    driversView: () => loadDrivers().catch(() => {}),
+    passengersView: () => loadPassengers().catch(() => {}),
+    financialsView: () => loadStats().catch(() => {}),
+    complaintsView: () => loadStats().catch(() => {}),
+    approvalsView: () => loadApprovals().catch(() => {}),
+    systemView: () => renderSessionInfo(),
+  };
+
+  function refreshView(viewId, moduleId) {
+    const mod = MODULES.find((m) => m.id === moduleId);
+    if (mod) {
+      loadModule(mod, true);   // force: bypass the loaded-once cache
+      return;
+    }
+    VIEW_LOADERS[viewId]?.();
+  }
+
   function setupDataEvents() {
-    el.refreshBtn?.addEventListener('click', () => { if (session) loadEverything(); });
+    el.refreshBtn?.addEventListener('click', () => {
+      if (!session) return;
+      const active = document.querySelector('.nav-item.active');
+      if (active) refreshView(active.dataset.view, active.dataset.module);
+      else loadEverything();
+    });
     $('langToggle')?.addEventListener('click', () => setLanguage(lang === 'ar' ? 'en' : 'ar'));
     el.rideStatusFilter?.addEventListener('change', () => loadRides().catch(() => {}));