P3 Stream M: CompleteTaskAction (widget interactive completion)

Glance ActionCallback wires to WidgetActionProcessor: premium marks pending +
calls API + refreshes; free tier opens paywall deep link instead. Idempotent,
rollback-safe on API failure.

Also fixes a one-line compile error in WidgetTaskActionReceiver.kt where
updateAllWidgets() had been removed by Stream L — swapped for forceRefresh()
so the build stays green. The legacy receiver is now redundant (replaced by
CompleteTaskAction) but deletion is deferred to a Stream K follow-up so the
AndroidManifest entry can be removed in the same commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

composeApp/src/androidMain/kotlin/com/tt/honeyDue/widget/CompleteTaskAction.kt

@@ -0,0 +1,39 @@
+package com.tt.honeyDue.widget
+
+import android.content.Context
+import androidx.glance.GlanceId
+import androidx.glance.action.ActionParameters
+import androidx.glance.appwidget.action.ActionCallback
+
+/**
+ * Glance [ActionCallback] wired to the "complete task" button on
+ * [HoneyDueLargeWidget] (and wherever else Stream K surfaces the control).
+ *
+ * The callback itself is deliberately thin — all policy lives in
+ * [WidgetActionProcessor]. This keeps the Glance action registration simple
+ * (required for Glance's reflective `actionRunCallback<CompleteTaskAction>`
+ * pattern) and lets the processor be unit-tested without needing a Glance
+ * runtime.
+ *
+ * iOS parity: mirrors `iosApp/HoneyDue/AppIntent.swift` `CompleteTaskIntent`.
+ */
+class CompleteTaskAction : ActionCallback {
+
+    override suspend fun onAction(
+        context: Context,
+        glanceId: GlanceId,
+        parameters: ActionParameters
+    ) {
+        val taskId = parameters[taskIdKey] ?: return
+        WidgetActionProcessor.processComplete(context, taskId)
+    }
+
+    companion object {
+        /**
+         * Parameter key used by widget task rows to pass the clicked task's
+         * id. Parameter name (`task_id`) matches the iOS `AppIntent`
+         * parameter for discoverability.
+         */
+        val taskIdKey: ActionParameters.Key<Long> = ActionParameters.Key("task_id")
+    }
+}