components: FullScreenPicker takes an optional actions slot

Forwards a trailing app-bar `actions` lambda through to CollapsingScaffold,
so a full-screen picker can carry a commit/extra action — a custom-value
Add/OK, a Reset — instead of being select-and-dismiss only.

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

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

@@ -2,6 +2,7 @@ package de.jeanlucmakiola.floret.components
 
 import android.view.WindowManager
 import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.RowScope
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.rounded.Check
 import androidx.compose.material3.Icon
@@ -25,6 +26,7 @@ fun FullScreenPicker(
     title: String,
     onDismiss: () -> Unit,
     predictiveBack: Boolean = false,
+    actions: @Composable RowScope.() -> Unit = {},
     content: @Composable ColumnScope.() -> Unit,
 ) {
     Dialog(
@@ -48,6 +50,7 @@ fun FullScreenPicker(
             onBack = onDismiss,
             largeTopBar = false,
             predictiveBack = predictiveBack,
+            actions = actions,
             content = content,
         )
     }