feat: guide mobile device readiness (Closes #555)

src/frontend_bundle.py

@@ -20,6 +20,7 @@ FEATURE_SOURCES = {
     "issue-capture": ("static/create-issue-sheet.js",),
     "pull-workflow": ("static/pull-sheet.js", "static/review-sheet.js"),
     "push-notifications": ("static/push-notifications.js",),
+    "device-setup": ("static/install-app.js", "static/mobile-device-setup.js"),
 }
 CACHE_DECLARATION = re.compile(
     r"const CACHE = 'stackchain-dashboard-shell-(?:v\d+|[0-9a-f]{16})';"