feat(dashboard): tableau de bord Second Brain configurable avec chargement progressif

Briefing granulaire, pistes rapides puis enrichissement async, layout persisté v5,
suggestions agents, intégration Gmail et navigation sidebar alignée sur /home.

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/docker-entrypoint.sh

@@ -117,17 +117,48 @@ fi
 # --- Background cron scheduler ---
 (
   sleep 60
+  CRON_SECRET="${CRON_SECRET:-}"
+  tick=0
   while true; do
-    node -e "
-      const http = require('http');
-      const req = http.request('http://localhost:3000/api/cron/agents', { method: 'POST' }, (res) => {
-        let body = '';
-        res.on('data', (d) => body += d);
-        res.on('end', () => console.log('[Scheduler] Cron response:', res.statusCode, body));
-      });
-      req.on('error', (e) => console.error('[Scheduler] Cron error:', e.message));
-      req.end();
-    " 2>&1 || true
+    if [ -n "$CRON_SECRET" ]; then
+      CRON_TICK="$tick" node -e "
+        const http = require('http');
+        const secret = process.env.CRON_SECRET || '';
+        const tick = Number(process.env.CRON_TICK || '0');
+        const call = (path, method) => new Promise((resolve) => {
+          const req = http.request({
+            hostname: 'localhost',
+            port: 3000,
+            path,
+            method: method || 'POST',
+            headers: { Authorization: 'Bearer ' + secret },
+          }, (res) => {
+            let body = '';
+            res.on('data', (d) => body += d);
+            res.on('end', () => { console.log('[Scheduler]', path, res.statusCode, body.slice(0, 200)); resolve(); });
+          });
+          req.on('error', (e) => { console.error('[Scheduler]', path, e.message); resolve(); });
+          req.end();
+        });
+        (async () => {
+          await call('/api/cron/agents');
+          await call('/api/cron/agent-suggestions');
+          if (tick % 12 === 0) {
+            await call('/api/cron/reminders');
+            await call('/api/cron/sync-usage');
+          }
+          if (tick % 72 === 0) {
+            await call('/api/cron/clusters', 'GET');
+          }
+          if (tick % 288 === 0) {
+            await call('/api/cron/gmail');
+          }
+        })();
+      " 2>&1 || true
+    else
+      warn "CRON_SECRET unset — scheduled crons disabled"
+    fi
+    tick=$((tick + 1))
     sleep 300
   done
 ) &