chore(planning): phase 5/6/7 planning artifacts + milestone-completion state sync

.planning/codebase/STACK.md

@@ -48,7 +48,7 @@ The stack below is split into (A) **what actually exists today** and (B) **what
 **Critical (runtime CDN dependencies of the mockups):**
 - `cdn.tailwindcss.com` — theming engine for all screens
 - `fonts.googleapis.com` / `fonts.gstatic.com` — Geist, Space Grotesk, Material Symbols
-- Mockup images are hosted/lifted from Google-hosted sample assets (`lh3.googleusercontent.com/aida/...` URLs appear in some screens' `<img>`/`src` attributes) — placeholders from the Stitch tooling, not project data
+- Mockup images were originally hosted/lifted from Google-hosted sample assets (`lh3.googleusercontent.com/aida/...` placeholders in the Stitch output). The logo placeholder has been replaced with the local project logo (`assets/MASTER_FILE-arah2_logo.svg`); any remaining remote URLs are non-logo placeholders.
 
 **Infrastructural (planned only — see `IDEAS.md` "Architecture Overview"; none is wired up):**
 - Telegram Bot API — frontend transport (`IDEAS.md`: "Telegram-first")