fix(06): IN-02 document resolveDefaultView is an SSR guard, not breakpoint logic

apps/pwa/src/components/CalendarShell.tsx

@@ -59,8 +59,12 @@ import { InstallPrompt } from './InstallPrompt.js'
 // ── Helpers ────────────────────────────────────────────────────────────────
 
 /**
- * D-05: phone (≤767px) defaults to 'month-agenda'; tablet/desktop to 'month-grid'.
- * Called once at render time; Schedule-X persists selected view internally after that.
+ * IN-02: this does NOT compute the D-05 phone/desktop default — that lives in the
+ * store's readPersistedView() (calendarStore.ts), which seeds selectedView with the
+ * breakpoint-aware default. By the time this runs, `persistedView` already carries that
+ * resolved default. The ONLY job here is the SSR guard: return a stable 'month-grid'
+ * when `window` is undefined (no breakpoint to read), otherwise pass the already-resolved
+ * view through unchanged. Do not expect breakpoint logic here.
  */
 function resolveDefaultView(persistedView: string): string {
   if (typeof window === 'undefined') return 'month-grid'