feat(velxio): improve teacher arduino toolbar, add expected_wiring template, and harden deployer board detection

- Add EXPECTED_WIRING block to set-arduino template and standalone expected-wiring feature in teacher content editor
- Reposition reload button to the far left inline with status dot, and shorten status text to 'Siap' / 'Menghubungkan...'
- Decouple transfer from save: replace 'Simpan ke Dokumen' with 'Pindahkan Hasil' and centralize document saving to top header save button
- Dynamically detect board FQBN from circuit in DeployTab with arduino:avr:uno fallback

frontend/src/lib/components/TeacherVelxioEditor.svelte

@@ -5,10 +5,12 @@
 	let {
 		initialCode = '',
 		initialCircuit = '',
+		onTransfer,
 		onSave
 	}: {
 		initialCode?: string;
 		initialCircuit?: string;
+		onTransfer?: (state: { code: string; circuit: string }) => void;
 		onSave?: (state: { code: string; circuit: string }) => void;
 	} = $props();
 
@@ -63,17 +65,23 @@
 		showFeedback('Dimuat ulang dari dokumen');
 	}
 
-	function handleSave() {
+	function handleTransfer() {
 		const state = getCurrentState();
 		if (!state) {
 			showFeedback('Gagal membaca state simulator');
 			return;
 		}
 
-		if (onSave) {
+		if (onTransfer) {
+			onTransfer(state);
+		} else if (onSave) {
 			onSave(state);
 		}
-		showFeedback('Tersimpan ke dokumen!');
+		showFeedback('Hasil dipindahkan ke editor');
+	}
+
+	function handleSave() {
+		handleTransfer();
 	}
 
 	function showFeedback(msg: string) {
@@ -137,17 +145,7 @@
 
 <div class="teacher-velxio-container">
 	<div class="teacher-velxio-toolbar">
-		<div class="toolbar-status">
-			<span class="status-dot" class:ready={isReady}></span>
-			<span class="status-text">
-				{isReady ? 'Simulator Siap (Mode Lengkap)' : 'Menghubungkan Simulator...'}
-			</span>
-			{#if saveFeedback}
-				<span class="save-feedback">{saveFeedback}</span>
-			{/if}
-		</div>
-
-		<div class="toolbar-actions">
+		<div class="toolbar-left">
 			<button
 				type="button"
 				class="toolbar-btn btn-reload"
@@ -163,19 +161,33 @@
 				<span>Muat Ulang</span>
 			</button>
 
+			<div class="toolbar-status">
+				<span class="status-dot" class:ready={isReady}></span>
+				<span class="status-text">
+					{isReady ? 'Siap' : 'Menghubungkan...'}
+				</span>
+				{#if saveFeedback}
+					<span class="save-feedback">{saveFeedback}</span>
+				{/if}
+			</div>
+		</div>
+
+		<div class="toolbar-actions">
 			<button
 				type="button"
-				class="toolbar-btn btn-save"
-				onclick={handleSave}
-				title="Simpan rangkaian dan kode saat ini langsung ke dokumen markdown"
+				class="toolbar-btn btn-transfer"
+				onclick={handleTransfer}
+				title="Pindahkan rangkaian dan kode dari simulator ke dokumen editor"
 				disabled={!isReady}
 			>
 				<svg class="icon" viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" stroke-width="2">
-					<path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"></path>
-					<polyline points="17 21 17 13 7 13 7 21"></polyline>
-					<polyline points="7 3 7 8 15 8"></polyline>
+					<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
+					<polyline points="14 2 14 8 20 8"></polyline>
+					<line x1="16" y1="13" x2="8" y2="13"></line>
+					<line x1="16" y1="17" x2="8" y2="17"></line>
+					<polyline points="10 9 9 9 8 9"></polyline>
 				</svg>
-				<span>Simpan ke Dokumen</span>
+				<span>Pindahkan Hasil</span>
 			</button>
 		</div>
 	</div>
@@ -215,6 +227,13 @@
 		flex-wrap: wrap;
 	}
 
+	.toolbar-left {
+		display: flex;
+		align-items: center;
+		gap: 12px;
+		flex-wrap: wrap;
+	}
+
 	.toolbar-status {
 		display: flex;
 		align-items: center;
@@ -292,13 +311,13 @@
 		cursor: not-allowed;
 	}
 
-	.btn-save {
+	.btn-transfer {
 		background: var(--color-primary, #0d6efd);
 		color: #ffffff;
 		border-color: var(--color-primary, #0d6efd);
 	}
 
-	.btn-save:hover:not(:disabled) {
+	.btn-transfer:hover:not(:disabled) {
 		background: var(--color-primary-dark, #0a58ca);
 		border-color: var(--color-primary-dark, #0a58ca);
 	}

frontend/src/routes/lesson/[slug]/DeployTab.svelte

@@ -163,12 +163,21 @@
 			deployMessage = 'Mengompilasi kode...';
 
 			let code = '';
+			let boardFqbn = 'arduino:avr:uno';
 
 			if (velxioIframe) {
 				const state = getVelxioState(velxioIframe);
 				if (state?.code) {
 					code = state.code;
 				}
+				if (state?.circuit) {
+					try {
+						const parsed = JSON.parse(state.circuit);
+						if (parsed?.board) {
+							boardFqbn = parsed.board;
+						}
+					} catch {}
+				}
 			}
 
 			if (!code) {
@@ -179,7 +188,7 @@
 				throw new Error('Tidak ada kode Arduino untuk di-deploy');
 			}
 
-			const res = await getHexContent({ code, board_fqbn: 'arduino:avr:uno' });
+			const res = await getHexContent({ code, board_fqbn: boardFqbn });
 
 			if (!res.success || !res.hex_content) {
 				throw new Error(res.error || 'Kompilasi gagal');

frontend/src/routes/teacher/content/+page.svelte

@@ -209,9 +209,8 @@
 		}
 	}
 
-	async function handleSaveVelxioFromTab(state: { code: string; circuit: string }) {
+	function handleTransferVelxioFromTab(state: { code: string; circuit: string }) {
 		applyVelxioToBody(state.code, state.circuit);
-		await mgr.handleSave();
 	}
 
 	async function handleSaveAction() {
@@ -375,10 +374,40 @@
 				'\n---EXPECTED_SERIAL_OUTPUT---\n' +
 				'LED ON\nLED OFF\n' +
 				'---END_EXPECTED_SERIAL_OUTPUT---\n' +
+				'\n---EXPECTED_WIRING---\n' +
+				'{\n' +
+				'  "wires": [\n' +
+				'    {\n' +
+				'      "start": { "componentId": "arduino-uno", "pinName": "13" },\n' +
+				'      "end": { "componentId": "led-builtin", "pinName": "A" }\n' +
+				'    },\n' +
+				'    {\n' +
+				'      "start": { "componentId": "arduino-uno", "pinName": "GND" },\n' +
+				'      "end": { "componentId": "led-builtin", "pinName": "C" }\n' +
+				'    }\n' +
+				'  ]\n' +
+				'}\n' +
+				'---END_EXPECTED_WIRING---\n' +
 				'\n---KEY_TEXT---\n' +
 				'kata_kunci\n' +
 				'---END_KEY_TEXT---\n',
 		},
+		{
+			id: 'expected-wiring',
+			label: 'Expected Wiring',
+			group: 'set_soal',
+			snippet:
+				'\n---EXPECTED_WIRING---\n' +
+				'{\n' +
+				'  "wires": [\n' +
+				'    {\n' +
+				'      "start": { "componentId": "arduino-uno", "pinName": "13" },\n' +
+				'      "end": { "componentId": "led-builtin", "pinName": "A" }\n' +
+				'    }\n' +
+				'  ]\n' +
+				'}\n' +
+				'---END_EXPECTED_WIRING---\n',
+		},
 		{
 			id: 'set-flowchart',
 			label: 'Set Flowchart',
@@ -648,7 +677,7 @@
 		{#snippet saveActions()}
 			{#if mgr.activePath && !isAssetFile}
 				<button class="panel-btn toolbar-toggle" class:active={featureSidebarOpen} onclick={() => featureSidebarOpen = !featureSidebarOpen} title="Tampilkan/sembunyikan panel Fitur">🧩</button>
-				<button class="panel-btn save-btn" onclick={() => handleSaveAction()} disabled={mgr.saving || !mgr.dirty} title="Simpan">
+				<button class="panel-btn save-btn" onclick={() => handleSaveAction()} disabled={mgr.saving || (!mgr.dirty && mgr.activeTab !== 'velxio')} title="Simpan">
 					{mgr.saving ? '⏳' : '💾'}
 				</button>
 				<button class="panel-btn publish-btn" onclick={() => handlePublishAction()} disabled={mgr.publishing || !mgr.draftId} title="Publish">
@@ -870,7 +899,8 @@
 											bind:this={velxioEditorRef}
 											initialCode={extractedCodes.velxio}
 											initialCircuit={extractedCircuitVelxio}
-											onSave={handleSaveVelxioFromTab}
+											onTransfer={handleTransferVelxioFromTab}
+											onSave={handleTransferVelxioFromTab}
 										/>
 									</div>
 								{:else if dynTab.id === 'flowchart'}