feat: Add cross-mode analytics dashboard with geofencing, correlations, and data export

Adds a unified analytics mode under the Security nav group that aggregates
data across all signal modes. Includes emergency squawk alerting (7700/7600/7500),
vertical rate anomaly detection, ACARS/VDL2-to-ADS-B flight correlation,
geofence zones with enter/exit detection for aircraft/vessels/APRS stations,
temporal pattern detection, RSSI history tracking, Meshtastic topology mapping,
and JSON/CSV data export.

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

templates/partials/modes/analytics.html

@@ -0,0 +1,124 @@
+<!-- ANALYTICS MODE -->
+                <div id="analyticsMode" class="mode-content">
+{# Analytics Dashboard Sidebar Panel #}
+
+<div class="section">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Summary</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div class="analytics-grid" id="analyticsSummaryCards">
+            <div class="analytics-card" data-mode="adsb">
+                <div class="card-count" id="analyticsCountAdsb">0</div>
+                <div class="card-label">Aircraft</div>
+                <div class="card-sparkline" id="analyticsSparkAdsb"></div>
+            </div>
+            <div class="analytics-card" data-mode="ais">
+                <div class="card-count" id="analyticsCountAis">0</div>
+                <div class="card-label">Vessels</div>
+                <div class="card-sparkline" id="analyticsSparkAis"></div>
+            </div>
+            <div class="analytics-card" data-mode="wifi">
+                <div class="card-count" id="analyticsCountWifi">0</div>
+                <div class="card-label">WiFi</div>
+                <div class="card-sparkline" id="analyticsSparkWifi"></div>
+            </div>
+            <div class="analytics-card" data-mode="bluetooth">
+                <div class="card-count" id="analyticsCountBt">0</div>
+                <div class="card-label">Bluetooth</div>
+                <div class="card-sparkline" id="analyticsSparkBt"></div>
+            </div>
+            <div class="analytics-card" data-mode="dsc">
+                <div class="card-count" id="analyticsCountDsc">0</div>
+                <div class="card-label">DSC</div>
+                <div class="card-sparkline" id="analyticsSparkDsc"></div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<div class="section">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Mode Health</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div class="analytics-health" id="analyticsHealth"></div>
+    </div>
+</div>
+
+<div class="section" id="analyticsSquawkSection" style="display:none;">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Emergency Squawks</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div class="squawk-emergency" id="analyticsSquawkPanel">
+            <div class="squawk-title">Active Emergency Codes</div>
+            <div id="analyticsSquawkList"></div>
+        </div>
+    </div>
+</div>
+
+<div class="section">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Recent Alerts</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div class="analytics-alert-feed" id="analyticsAlertFeed">
+            <div class="analytics-empty">No recent alerts</div>
+        </div>
+    </div>
+</div>
+
+<div class="section">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Correlations</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div id="analyticsCorrelations">
+            <div class="analytics-empty">No correlations detected</div>
+        </div>
+    </div>
+</div>
+
+<div class="section">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Geofences</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div id="analyticsGeofenceList"></div>
+        <button class="btn btn-sm" onclick="Analytics.addGeofence()" style="margin-top:8px; font-size:10px; padding:4px 10px; background:var(--accent-cyan); color:#fff; border:none; border-radius:4px; cursor:pointer;">
+            + Add Zone
+        </button>
+    </div>
+</div>
+
+<div class="section">
+    <h3 class="section-header collapsible" onclick="toggleSection(this)">
+        <span>Export Data</span>
+        <span class="collapse-icon">&#9660;</span>
+    </h3>
+    <div class="section-content">
+        <div class="export-controls">
+            <select id="exportMode">
+                <option value="adsb">ADS-B</option>
+                <option value="ais">AIS</option>
+                <option value="wifi">WiFi</option>
+                <option value="bluetooth">Bluetooth</option>
+                <option value="dsc">DSC</option>
+            </select>
+            <select id="exportFormat">
+                <option value="json">JSON</option>
+                <option value="csv">CSV</option>
+            </select>
+            <button onclick="Analytics.exportData()">Export</button>
+        </div>
+    </div>
+</div>
+
+                </div>