feat: integrate all Tier 1 features in page orchestrator

Wire BottomSheet+TaskDetail, undo Toast, ConfirmDialog for delete,
and start/stop handlers into +page.svelte.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

opal-web/src/routes/+page.svelte

@@ -8,6 +8,10 @@
 	import Header from '$lib/components/Header.svelte';
 	import TaskList from '$lib/components/TaskList.svelte';
 	import InputBar from '$lib/components/InputBar.svelte';
+	import BottomSheet from '$lib/components/BottomSheet.svelte';
+	import TaskDetail from '$lib/components/TaskDetail.svelte';
+	import Toast from '$lib/components/Toast.svelte';
+	import ConfirmDialog from '$lib/components/ConfirmDialog.svelte';
 
 	let activeReport = 'list';
 	/** @type {import('$lib/api/types.js').Task[]} */
@@ -15,6 +19,21 @@
 	let loading = true;
 	let inputError = '';
 
+	// Bottom sheet state
+	/** @type {import('$lib/api/types.js').Task|null} */
+	let selectedTask = null;
+
+	// Undo toast state
+	/** @type {{ uuid: string, description: string }|null} */
+	let undoToast = null;
+
+	// Delete confirmation state
+	/** @type {{ uuid: string, description: string }|null} */
+	let deleteTarget = null;
+
+	/** @type {ConfirmDialog} */
+	let confirmDialog;
+
 	// Subscribe to store
 	const unsubscribe = tasksStore.subscribe(value => {
 		tasks = value;
@@ -124,12 +143,98 @@
 	 * @param {string} uuid
 	 */
 	async function handleComplete(uuid) {
+		const task = tasks.find(t => t.uuid === uuid);
+		if (!task) return;
+
 		try {
 			await tasksStore.complete(uuid);
+			// Show undo toast
+			undoToast = { uuid: task.uuid, description: task.description };
 		} catch (error) {
 			console.error('Failed to complete task:', error);
 		}
 	}
+
+	async function handleUndo() {
+		if (!undoToast) return;
+		const { uuid } = undoToast;
+		undoToast = null;
+
+		try {
+			await tasksStore.updateTask(uuid, { status: 'P', end: null });
+			await loadReport(activeReport);
+		} catch (error) {
+			console.error('Failed to undo completion:', error);
+		}
+	}
+
+	/**
+	 * @param {string} uuid
+	 */
+	async function handleStartStop(uuid) {
+		const task = tasks.find(t => t.uuid === uuid);
+		if (!task) return;
+
+		try {
+			if (task.start) {
+				await tasksStore.stopTask(uuid);
+			} else {
+				await tasksStore.startTask(uuid);
+			}
+			// Update selectedTask if it's the same task
+			if (selectedTask?.uuid === uuid) {
+				const updated = tasks.find(t => t.uuid === uuid);
+				if (updated) selectedTask = updated;
+			}
+		} catch (error) {
+			console.error('Failed to start/stop task:', error);
+		}
+	}
+
+	/**
+	 * @param {string} uuid
+	 * @param {Partial<import('$lib/api/types.js').Task>} updates
+	 */
+	async function handleUpdate(uuid, updates) {
+		try {
+			await tasksStore.updateTask(uuid, updates);
+			// Keep selectedTask fresh
+			if (selectedTask?.uuid === uuid) {
+				selectedTask = { ...selectedTask, ...updates };
+			}
+		} catch (error) {
+			console.error('Failed to update task:', error);
+		}
+	}
+
+	/**
+	 * @param {string} uuid
+	 */
+	function handleDeleteRequest(uuid) {
+		const task = tasks.find(t => t.uuid === uuid)
+			?? (selectedTask?.uuid === uuid ? selectedTask : null);
+		if (!task) return;
+
+		deleteTarget = { uuid: task.uuid, description: task.description };
+		confirmDialog.open();
+	}
+
+	async function handleDeleteConfirm() {
+		if (!deleteTarget) return;
+		const { uuid } = deleteTarget;
+		deleteTarget = null;
+		selectedTask = null;
+
+		try {
+			await tasksStore.deleteTask(uuid);
+		} catch (error) {
+			console.error('Failed to delete task:', error);
+		}
+	}
+
+	function handleDeleteCancel() {
+		deleteTarget = null;
+	}
 </script>
 
 <Header {activeReport} onReportChange={handleReportChange} />
@@ -139,9 +244,44 @@
 	{loading}
 	{activeReport}
 	onComplete={handleComplete}
+	onTap={(task) => selectedTask = task}
+	onStartStop={handleStartStop}
 />
 
 <InputBar
 	onSubmit={handleSubmit}
 	error={inputError}
 />
+
+<BottomSheet open={selectedTask !== null} onClose={() => selectedTask = null}>
+	{#if selectedTask}
+		<TaskDetail
+			task={selectedTask}
+			onUpdate={handleUpdate}
+			onStart={(uuid) => handleStartStop(uuid)}
+			onStop={(uuid) => handleStartStop(uuid)}
+			onDelete={handleDeleteRequest}
+			onComplete={handleComplete}
+			onClose={() => selectedTask = null}
+		/>
+	{/if}
+</BottomSheet>
+
+{#if undoToast}
+	<Toast
+		message={'Completed "' + undoToast.description + '"'}
+		action={{ label: 'Undo', handler: handleUndo }}
+		onDismiss={() => undoToast = null}
+	/>
+{/if}
+
+<ConfirmDialog
+	bind:this={confirmDialog}
+	title="Delete task?"
+	message={deleteTarget?.description ?? ''}
+	detail="This cannot be undone."
+	confirmLabel="Delete"
+	confirmVariant="danger"
+	onConfirm={handleDeleteConfirm}
+	onCancel={handleDeleteCancel}
+/>