- Resolve visual-direction conflicts (app_theme, main.dart, signup/onboarding
screens, index.html) in favor of the soft-gradient + glassmorphism design;
drop the competing Twin Shadow palette and TwinTokens usage.
- Port non-visual additions from the parallel branch: CORS middleware,
FlutterError/PlatformDispatcher crash handlers + boot timeout/fallback
screen in main.dart, and the shared demo-invite feature
(core-backend/demo.go, demo_test.go, mobile/lib/config.dart), reskinning
the demo panel to match the glass UI.
- Rename the shared demo invite code DEMO-BUNSIN -> DEMO-YKAVU on both
client and server so the tester-facing feature keeps working.
- Purge remaining "분신"/"bunsin" identifiers app-wide: Dart package name
(bunsin_mobile -> ykavu_mobile), Android applicationId/namespace
(com.bunsin.bunsin_mobile -> com.ykavu.ykavu_mobile, incl. Kotlin source
dir move), on-device DB filename, keystore alias/docs, PoC draft-generator
system prompt, and the static web boot placeholder div.
Seed a reusable demo invite (ALLOW_DEMO_INVITE, default on) and surface it
on the Flutter signup screen with one-tap fill so others can try without
asking for a one-off admin mint.
Co-authored-by: okuma <o0kuma@users.noreply.github.com>