- Simulate progress step advancement at 1.5s intervals during API calls
so users see incremental progress instead of all-at-once bursts
- PersonaChip skips API calls entirely in feature-only mode (no console spam)
- getUserPersonas/getPlatformPersona return null on 404 instead of throwing
- PersonaChip shows neutral gray state when no persona data exists
- Back button now clears draft to return to LinkedIn writer home screen
- Article title extracted from markdown content (fixes KeyError)
- InitialRouteHandler: demo mode subscribes getDefaultLandingRoute()
- Header: back button shown when draft exists, navigates to home screen
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