feat(components): expose SelectedCheck as a family primitive

The trailing check that marks a chosen row in a full-screen picker was
private to OptionPicker, so every consumer hand-rolled its own copy.
Calendula alone carried five, and they had drifted: the kit drew
Icons.Rounded.Check, all five app copies drew Icons.Default.Check.

Make it public with KDoc so pickers share one selection affordance
instead of re-deriving it. Rounded wins, as the kit's existing choice.

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

CHANGELOG.md

@@ -6,10 +6,24 @@ All notable changes to floret-kit are documented here. The format follows
 floret-kit is consumed **from source** — each app embeds it as a git submodule
 and builds it through a Gradle composite build, pinning a specific commit. There
 are no binary releases; "version" tracks the shared `version` in the root build
-(currently `0.2.0`). Entries are grouped by module.
+(currently `0.2.1`). Entries are grouped by module.
 
 ## [Unreleased]
 
+## [0.2.1] - 2026-07-17
+
+### Added
+
+- **`components`** — `CollapsingScaffold` takes a `scrollable` flag (default
+  `true`, so every existing caller is unchanged). Set it to `false` when the
+  content brings its own scrolling container: the scaffold's own
+  `verticalScroll` composes each row up front and can't host a `LazyColumn`
+  (nesting a same-axis scrollable throws), which ruled out any surface with more
+  options than fit an eager pass. Opting out hands the content a plain column and
+  leaves the insets, IME padding and top-bar collapse as they were.
+  `FullScreenPicker` forwards the flag. Consumed by Calendula's ~600-entry
+  time-zone picker from 2.16.0.
+
 ## [0.2.0] - 2026-07-17
 
 ### Added

build.gradle.kts

@@ -10,5 +10,5 @@ plugins {
 
 subprojects {
     group = "de.jeanlucmakiola.floret"
-    version = "0.2.0"
+    version = "0.2.1"
 }

components/src/main/kotlin/de/jeanlucmakiola/floret/components/OptionPicker.kt

@@ -102,8 +102,18 @@ fun <T> OptionPicker(
     }
 }
 
+/**
+ * The trailing check that marks the chosen row in a full-screen picker — the
+ * family's single selection affordance, so every picker (option, reminder,
+ * agenda range, timezone, calendar, recurrence) marks its selection the same
+ * way. Pair it with `GroupedRow(selected = true)`: the tonal highlight carries
+ * the state at a glance, the check confirms it unambiguously.
+ *
+ * Purely decorative — the row itself owns the semantics, so it takes no
+ * content description.
+ */
 @Composable
-private fun SelectedCheck() {
+fun SelectedCheck() {
     Icon(
         imageVector = Icons.Rounded.Check,
         contentDescription = null,