chore(mobile-responsive-parity): archive verified change (paperwork-only)

Code merged to main on 2026-06-26 via rebase (01527ae) + bug-fix passes
(5a43894/04871bd/f7f590f). All 8 ACs PASS. Only SDD artifacts were untracked;
this archive closes the paperwork gap. No code changes, no canonical sync.
See archive-report.md for carry-over notes (iOS real-device test residual).

openspec/changes/archive/2026-06-26-mobile-responsive-parity/.pi-map.index.md

@@ -0,0 +1,23 @@
+# openspec/changes/mobile-responsive-parity (index)
+dir: openspec/changes/mobile-responsive-parity
+
+## role
+Planning and specification package documenting the design, requirements, and implementation plan for achieving mobile-responsive UI parity across a React frontend application.
+## parent
+index: openspec/changes/.pi-map.index.md
+map: openspec/changes/.pi-map.md
+## children
+-
+## files
+- design.md
+- proposal.md
+- spec.md
+- tasks.md
+- verify-report.md
+## links
+index: openspec/changes/mobile-responsive-parity/.pi-map.index.md
+map: openspec/changes/mobile-responsive-parity/.pi-map.md
+## workflows
+-
+## dirty
+-