send the first usage note after leaving the choices, not on the switch

gearslip/src/main/java/app/seb3thehacker/gearslip/stats/UsageStats.kt

@@ -78,8 +78,14 @@ object UsageStats {
             .putBoolean("share_phone", choices.phone)
             .putBoolean("share_cars", choices.cars)
             .apply()
-        if (enabled) sendSoon(context)
-        else prefs(context).edit().remove(KEY_CARS).remove(KEY_SENT_DAY).apply()
+        // Turning it on sends nothing yet: the driver may still be ticking boxes. The first note
+        // waits for [choicesClosed].
+        if (!enabled) prefs(context).edit().remove(KEY_CARS).remove(KEY_SENT_DAY).apply()
+    }
+
+    /** The driver left the screen with the usage note choices: send today's note if it's due. */
+    fun choicesClosed(context: Context) {
+        if (prefs(context).getString(KEY_SENT_DAY, null) != LocalDate.now().toString()) sendSoon(context)
     }
 
     /** Gearslip was opened: send today's note unless one already went out. */

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/UsageStatsChoices.kt

@@ -25,6 +25,7 @@ import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -80,6 +81,8 @@ internal fun ColumnScope.UsageStatsRows(showNote: Boolean) {
     var choices by remember { mutableStateOf(UsageStats.choices(context)) }
     var noteOpen by remember { mutableStateOf(false) }
     fun save() = UsageStats.set(context, on, choices)
+    // Nothing goes out while the choices are on screen; leaving them sends the first note.
+    DisposableEffect(Unit) { onDispose { UsageStats.choicesClosed(context) } }
 
     SettingsRow(
         "Send usage notes",
@@ -180,7 +183,13 @@ internal fun UsageStatsPrompt() {
                 )
             }
         },
-        confirmButton = { TextButton(onClick = { UsageStats.set(context, true); show = false }) { Text("Turn on") } },
+        confirmButton = {
+            TextButton(onClick = {
+                UsageStats.set(context, true)
+                show = false
+                UsageStats.choicesClosed(context)
+            }) { Text("Turn on") }
+        },
         dismissButton = { TextButton(onClick = { UsageStats.set(context, false); show = false }) { Text("No thanks") } },
     )
 }