release: cut v2.0.0 — write support complete

Version bumped to 2.0.0 / 13. No code changes beyond the version — 2.0.0
closes out Milestone 2 (write support, v1.1 through v2.0): the final slice
is the save-conflict dialog (external change → overwrite/discard, external
delete → informational close), plus the store refresh: descriptions and
README describe write support and reminders, and fastlane screenshots
(DE+EN, six each) ship for F-Droid. CHANGELOG [2.0.0] carries the details.

Quick-add was cut from scope (the prefilled form covers it); calendar
switching while editing moved to the v3 backlog. Both documented in the
roadmap.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -53,7 +53,7 @@ after v0.6 (full event read) plus the onboarding-screen polish pass.
 - ~~Redesign the initial grant-access (permission) screen~~ — **done**
   (Material 3 Expressive onboarding, shipped in v0.6.0 / v1.0.0)
 
-## v2.0 — Write Support (in progress)
+## v2.0 — Write Support (complete, shipped 2026-06-11)
 
 Delivered in four releasable slices (plan:
 `docs/superpowers/plans/2026-06-11-03-write-support.md`). The V1 spec is a
@@ -66,7 +66,7 @@ guide here, not a contract — scope per slice is decided as we go.
 | v1.2.1 | Form polish after on-device review — card design system, optional fields + settings defaults, OptionCard dialogs, expressive motion | complete (shipped 2026-06-11) |
 | v1.3 | Edit event — shared form, scoped recurring writes (this / following / all), recurrence picker | complete (shipped 2026-06-11) |
 | v1.4 | Reminder notifications — see below | complete (shipped 2026-06-11) |
-| v2.0 | Conflict dialog, polish pass (stale read-only copy in F-Droid/README), release | planned |
+| v2.0 | Conflict dialog, polish pass (store copy refresh, F-Droid screenshots), release | complete (shipped 2026-06-11) |
 
 v2.0 scope was re-cut on 2026-06-11, after v1.4:
 - **Occurrence edit** already shipped early, in v1.3.