Add Android APK fleet nodes with Crucible UI integration and tests.

APK wrapper registers platform=android via AETHERFORGE_PLATFORM; fleet UI shows robot icons, Android Access Depth probes, and a shortened mining onion timeline.

server/web/src/help/accessDepth.test.ts

@@ -76,3 +76,27 @@ describe('buildAccessDepthModel pending chain', () => {
     expect(model.failed).toHaveLength(1);
   });
 });
+
+describe('buildAccessDepthModel android', () => {
+  it('uses android platform label and probes', () => {
+    const model = buildAccessDepthModel(
+      agent({ platform: 'android', os_version: '14', arch: 'arm64' }),
+      parseAccessDepthDiagnostics({
+        environment_probes: {
+          wifi: true,
+          battery: true,
+          foreground_service: true,
+        },
+        tier_chain_order: ['foreground_service', 'cpu_inprocess'],
+      }),
+    );
+    expect(model.platformLabel).toBe('Android');
+    expect(model.probes.map((p) => p.label)).toEqual(['Wi-Fi', 'Battery', 'Foreground svc']);
+    expect(model.miningOnion.map((r) => r.tier)).toEqual([
+      'foreground_service',
+      'cpu_inprocess',
+      'desktop_tiers_skipped',
+    ]);
+    expect(model.spreadOnion).toEqual([]);
+  });
+});