release: cut v2.5.0 — home-screen widgets, agenda, jump-to-date, quick actions

Bundles the unreleased Tier 2/3 work into one release:

- Home-screen widgets (Glance): an "Upcoming" agenda widget and a month-grid
  widget, both reusing the in-app grouping/layout (groupAgendaDays,
  layoutMonthWeeks) via a Hilt WidgetEntryPoint, honouring hidden-calendar
  filters and refreshing on PROVIDER_CHANGED / date rollover.
- App shortcut: launcher long-press "New event", routed through the shared
  WidgetNavRequest.Create channel into the create-event form.
- Agenda view and jump-to-date (already merged via #3/#4) are documented here
  as part of the shipped version.

Bumps versionCode 20500 / versionName 2.5.0, moves the CHANGELOG Unreleased
section under [2.5.0], updates ROADMAP/STATE, and adds EN+DE strings.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

gradle/libs.versions.toml

@@ -24,6 +24,8 @@ turbine = "1.2.0"
 hiltNavigationCompose = "1.3.0"
 lifecycleCompose = "2.10.0"
 androidxTestRules = "1.7.0"
+# Glance: 1.1.1 is the latest stable (1.2.0 is still rc, 1.3.0 alpha).
+glance = "1.1.1"
 
 [libraries]
 # AndroidX core
@@ -79,6 +81,10 @@ androidx-hilt-navigation-compose = { group = "androidx.hilt", name = "hilt-navig
 # Lifecycle compose (for collectAsStateWithLifecycle)
 androidx-lifecycle-runtime-compose = { group = "androidx.lifecycle", name = "lifecycle-runtime-compose", version.ref = "lifecycleCompose" }
 
+# Glance — Jetpack home-screen widgets (Compose-like RemoteViews)
+androidx-glance-appwidget = { group = "androidx.glance", name = "glance-appwidget", version.ref = "glance" }
+androidx-glance-material3 = { group = "androidx.glance", name = "glance-material3", version.ref = "glance" }
+
 # Android tests - GrantPermissionRule
 androidx-test-rules = { group = "androidx.test", name = "rules", version.ref = "androidxTestRules" }