feat: notebook per-cell execution via open-terminal REST endpoints

- Add notebook API functions (createNotebookSession, executeNotebookCell, stopNotebookSession)
- Create CellEditor component with CodeMirror for cell editing
- Rewrite NotebookView with session-based execution, Run All, Restart, Stop
- Kernel status indicator with tooltips
- Wire baseUrl/apiKey through FilePreview and FileNav

src/lib/components/chat/FileNav.svelte

@@ -845,6 +845,8 @@
 						const result = await excelToTable(excelWorkbook.Sheets[sheet]);
 						fileOfficeHtml = result.html;
 					}}
+					baseUrl={selectedTerminal?.url ?? ''}
+					apiKey={selectedTerminal?.key ?? ''}
 					{overlay}
 					onSave={async (content) => {
 						const terminal = selectedTerminal;

src/lib/components/chat/FileNav/CellEditor.svelte

@@ -0,0 +1,109 @@
+<script lang="ts">
+	import '$lib/utils/codemirror';
+	import { basicSetup, EditorView } from 'codemirror';
+	import { keymap } from '@codemirror/view';
+	import { Compartment, EditorState, Prec } from '@codemirror/state';
+	import { indentWithTab } from '@codemirror/commands';
+	import { indentUnit } from '@codemirror/language';
+	import { languages } from '@codemirror/language-data';
+	import { oneDark } from '@codemirror/theme-one-dark';
+	import { onMount, onDestroy, createEventDispatcher } from 'svelte';
+
+	const dispatch = createEventDispatcher();
+
+	export let value = '';
+	export let lang = 'python';
+
+	let container: HTMLDivElement;
+	let editor: EditorView | null = null;
+	let editorTheme = new Compartment();
+	let editorLanguage = new Compartment();
+
+	const getLang = async () => {
+		const language = languages.find((l) => l.alias.includes(lang));
+		return await language?.load();
+	};
+
+	onMount(async () => {
+		const isDark = document.documentElement.classList.contains('dark');
+
+		const extensions = [
+			Prec.highest(keymap.of([
+				{
+					key: 'Mod-Enter',
+					run: () => {
+						dispatch('run');
+						return true;
+					}
+				},
+				{
+					key: 'Escape',
+					run: () => {
+						dispatch('cancel');
+						return true;
+					}
+				}
+			])),
+			basicSetup,
+			keymap.of([indentWithTab]),
+			indentUnit.of('    '),
+			EditorView.updateListener.of((e) => {
+				if (e.docChanged) {
+					value = e.state.doc.toString();
+					dispatch('change', value);
+				}
+			}),
+			editorTheme.of(isDark ? oneDark : []),
+			editorLanguage.of([]),
+			EditorView.theme({
+				'&': { fontSize: '0.75rem' },
+				'.cm-content': { padding: '0.35rem 0', fontFamily: 'ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace' },
+				'.cm-gutters': { display: 'none' },
+				'.cm-focused': { outline: 'none' },
+				'.cm-scroller': { overflow: 'auto' }
+			})
+		];
+
+		editor = new EditorView({
+			state: EditorState.create({ doc: value, extensions }),
+			parent: container
+		});
+
+		const language = await getLang();
+		if (language && editor) {
+			editor.dispatch({ effects: editorLanguage.reconfigure(language) });
+		}
+
+		// Watch dark mode
+		const observer = new MutationObserver(() => {
+			const dark = document.documentElement.classList.contains('dark');
+			editor?.dispatch({ effects: editorTheme.reconfigure(dark ? oneDark : []) });
+		});
+		observer.observe(document.documentElement, { attributes: true, attributeFilter: ['class'] });
+
+		editor.focus();
+
+		return () => {
+			observer.disconnect();
+			editor?.destroy();
+			editor = null;
+		};
+	});
+
+	onDestroy(() => {
+		editor?.destroy();
+		editor = null;
+	});
+</script>
+
+<div bind:this={container} class="nb-cm-editor" />
+
+<style>
+	.nb-cm-editor {
+		width: 100%;
+		background: #fffef5;
+	}
+	:global(.dark) .nb-cm-editor {
+		background: transparent;
+	}
+</style>

src/lib/components/chat/FileNav/FilePreview.svelte

@@ -25,6 +25,10 @@
 	export let fileSqliteData: ArrayBuffer | null = null;
 	export let fileContent: string | null = null;
 
+	// Terminal connection for notebook execution
+	export let baseUrl: string = '';
+	export let apiKey: string = '';
+
 	// Office preview props
 	export let fileOfficeHtml: string | null = null;
 	export let fileOfficeSlides: string[] | null = null;
@@ -409,7 +413,7 @@
 			</div>
 		{:else if isNotebook && !showRaw && parsedNotebook}
 			<div class="overflow-auto h-full">
-				<NotebookView notebook={parsedNotebook} />
+				<NotebookView notebook={parsedNotebook} filePath={selectedFile ?? ''} {baseUrl} {apiKey} />
 			</div>
 		{:else if isJson && !showRaw && parsedJson !== undefined}
 			<div class="overflow-auto h-full">

src/lib/components/chat/FileNav/NotebookView.svelte

@@ -1,12 +1,23 @@
 <script lang="ts">
-	import { getContext } from 'svelte';
+	import { getContext, onMount, onDestroy } from 'svelte';
 	import { marked } from 'marked';
 	import DOMPurify from 'dompurify';
 	import { highlightCode } from '$lib/utils/codeHighlight';
+	import {
+		createNotebookSession,
+		executeNotebookCell,
+		stopNotebookSession
+	} from '$lib/apis/terminal';
+	import Spinner from '../../common/Spinner.svelte';
+	import Tooltip from '../../common/Tooltip.svelte';
+	import CellEditor from './CellEditor.svelte';
 
 	const i18n = getContext('i18n');
 
 	export let notebook: Record<string, unknown>;
+	export let filePath: string = '';
+	export let baseUrl: string = '';
+	export let apiKey: string = '';
 
 	interface NotebookCell {
 		cell_type: 'markdown' | 'code' | 'raw';
@@ -33,7 +44,7 @@
 	const toStr = (s: string[] | string | undefined): string =>
 		Array.isArray(s) ? s.join('') : s ?? '';
 
-	// Highlight code cells with Shiki
+	// ── Syntax highlighting ──────────────────────────────────────────────
 	let highlightedCells: Record<number, string> = {};
 
 	const highlightCell = async (index: number, code: string, language: string) => {
@@ -45,7 +56,7 @@
 				defaultColor: 'light'
 			});
 			highlightedCells[index] = html;
-			highlightedCells = highlightedCells; // trigger reactivity
+			highlightedCells = highlightedCells;
 		} catch {
 			// fallback handled in template
 		}
@@ -54,12 +65,13 @@
 	$: {
 		highlightedCells = {};
 		cells.forEach((cell, i) => {
-			if (cell.cell_type === 'code') {
+			if (cell.cell_type === 'code' && !editingCell[i]) {
 				highlightCell(i, toStr(cell.source), lang);
 			}
 		});
 	}
 
+	// ── Markdown / output helpers ────────────────────────────────────────
 	const renderMarkdown = (src: string): string =>
 		DOMPurify.sanitize(marked.parse(src, { async: false }) as string);
 
@@ -72,11 +84,7 @@
 		for (const [mime, content] of Object.entries(output.data)) {
 			if (mime.startsWith('image/')) {
 				const raw = Array.isArray(content) ? content.join('') : content;
-				if (raw.startsWith('data:')) {
-					images.push(raw);
-				} else {
-					images.push(`data:${mime};base64,${raw}`);
-				}
+				images.push(raw.startsWith('data:') ? raw : `data:${mime};base64,${raw}`);
 			}
 		}
 		return images;
@@ -84,8 +92,7 @@
 
 	const getOutputHtml = (output: NotebookOutput): string | null => {
 		if (!output.data?.['text/html']) return null;
-		const raw = toStr(output.data['text/html']);
-		return DOMPurify.sanitize(raw);
+		return DOMPurify.sanitize(toStr(output.data['text/html']));
 	};
 
 	const getOutputText = (output: NotebookOutput): string | null => {
@@ -93,31 +100,234 @@
 		if (output.data?.['text/plain']) return toStr(output.data['text/plain']);
 		return null;
 	};
+
+	// ── Cell editing ─────────────────────────────────────────────────────
+	let editingCell: Record<number, boolean> = {};
+	let editedSources: Record<number, string> = {};
+
+	const startEditing = (index: number) => {
+		editingCell[index] = true;
+		editedSources[index] = toStr(cells[index].source);
+		editingCell = editingCell;
+	};
+
+	const cancelEditing = (index: number) => {
+		delete editingCell[index];
+		delete editedSources[index];
+		editingCell = editingCell;
+		highlightCell(index, toStr(cells[index].source), lang);
+	};
+
+	// ── Session / kernel ─────────────────────────────────────────────────
+	let sessionId: string | null = null;
+	let kernelReady = false;
+	let kernelStarting = false;
+	let kernelError: string | null = null;
+	let runningCell: number | null = null;
+	let runAllActive = false;
+
+	const canExecute = baseUrl && apiKey && filePath;
+
+	const startSession = async (): Promise<boolean> => {
+		if (!baseUrl || !apiKey || !filePath) return false;
+		kernelStarting = true;
+		kernelError = null;
+
+		const result = await createNotebookSession(baseUrl, apiKey, filePath);
+
+		if ('error' in result) {
+			kernelStarting = false;
+			kernelError = result.error;
+			return false;
+		}
+
+		sessionId = result.id;
+		kernelReady = true;
+		kernelStarting = false;
+		return true;
+	};
+
+	const stopSession = async () => {
+		if (sessionId && baseUrl && apiKey) {
+			await stopNotebookSession(baseUrl, apiKey, sessionId);
+		}
+		sessionId = null;
+		kernelReady = false;
+	};
+
+	const runCell = async (index: number) => {
+		if (runningCell !== null) return;
+		if (!kernelReady && !(await startSession())) return;
+
+		runningCell = index;
+		const source = editedSources[index] ?? toStr(cells[index].source);
+
+		// Apply edits
+		if (editedSources[index] !== undefined) {
+			cells[index].source = editedSources[index];
+			delete editingCell[index];
+			delete editedSources[index];
+			editingCell = editingCell;
+		}
+
+		const result = await executeNotebookCell(baseUrl, apiKey, sessionId!, index, source);
+
+		if ('error' in result) {
+			cells[index].outputs = [{
+				output_type: 'error',
+				ename: 'ExecutionError',
+				evalue: result.error,
+				traceback: [result.error]
+			}];
+		} else {
+			cells[index].outputs = result.outputs;
+			if (result.execution_count !== undefined) {
+				cells[index].execution_count = result.execution_count;
+			}
+		}
+
+		cells = cells;
+		runningCell = null;
+		highlightCell(index, toStr(cells[index].source), lang);
+	};
+
+	const runAll = async () => {
+		if (runAllActive) return;
+		runAllActive = true;
+		for (let i = 0; i < cells.length; i++) {
+			if (cells[i].cell_type === 'code') {
+				await runCell(i);
+			}
+		}
+		runAllActive = false;
+	};
+
+	const autoResize = (e: Event) => {
+		const ta = e.target as HTMLTextAreaElement;
+		ta.style.height = 'auto';
+		ta.style.height = ta.scrollHeight + 'px';
+	};
+
+	onDestroy(() => {
+		if (sessionId) stopSession();
+	});
 </script>
 
 <div class="notebook-view">
+	<!-- Toolbar -->
+	{#if baseUrl && apiKey && filePath}
+		<div class="nb-toolbar flex items-center gap-1 px-2 py-0.5">
+			<button
+				class="nb-btn text-[0.6rem]"
+				on:click={runAll}
+				disabled={runAllActive || runningCell !== null}
+			>
+				{$i18n.t('Run All')}
+			</button>
+			{#if kernelReady}
+				<button class="nb-btn text-[0.6rem]" on:click={async () => { await stopSession(); await startSession(); }}>
+					{$i18n.t('Restart')}
+				</button>
+				<button class="nb-btn text-[0.6rem]" on:click={stopSession}>
+					{$i18n.t('Stop')}
+				</button>
+			{/if}
+
+			<div class="flex-1"></div>
+
+			<div class="flex items-center select-none">
+				{#if kernelStarting}
+					<Tooltip content={$i18n.t('Starting kernel...')} placement="bottom"><Spinner className="size-2" /></Tooltip>
+				{:else if runningCell !== null}
+					<Tooltip content={$i18n.t('Running')} placement="bottom"><Spinner className="size-2" /></Tooltip>
+				{:else if kernelReady}
+					<Tooltip content="Jupyter" placement="bottom"><span class="size-1.5 rounded-full bg-green-500 inline-block"></span></Tooltip>
+				{:else}
+					<Tooltip content={$i18n.t('No kernel')} placement="bottom"><span class="size-1.5 rounded-full bg-gray-400 dark:bg-gray-600 inline-block"></span></Tooltip>
+				{/if}
+			</div>
+		</div>
+
+		{#if kernelError}
+			<div class="px-2 py-1 text-[0.65rem] text-red-600 dark:text-red-400 bg-red-50 dark:bg-red-950/30 whitespace-pre-wrap font-mono">
+				{kernelError}
+			</div>
+		{/if}
+	{/if}
+
+	<!-- Cells -->
 	{#each cells as cell, i}
 		<div class="nb-cell nb-cell-{cell.cell_type}">
 			{#if cell.cell_type === 'markdown'}
-				<div class="nb-markdown prose dark:prose-invert max-w-full text-sm">
-					{@html renderMarkdown(toStr(cell.source))}
-				</div>
+				{#if editingCell[i]}
+					<textarea
+						class="nb-edit-textarea text-sm"
+						bind:value={editedSources[i]}
+						on:input={autoResize}
+						on:blur={() => cancelEditing(i)}
+						on:keydown={(e) => { if (e.key === 'Escape') cancelEditing(i); }}
+					></textarea>
+				{:else}
+					<!-- svelte-ignore a11y-click-events-have-key-events -->
+					<div
+						class="nb-markdown prose dark:prose-invert max-w-full text-sm cursor-text"
+						role="textbox"
+						tabindex="0"
+						on:dblclick={() => startEditing(i)}
+					>
+						{@html renderMarkdown(toStr(cell.source))}
+					</div>
+				{/if}
 			{:else if cell.cell_type === 'code'}
 				<div class="nb-code-wrap">
-					<div class="nb-cell-label">
-						{#if cell.execution_count !== undefined && cell.execution_count !== null}
-							[{cell.execution_count}]
-						{:else}
-							[ ]
+					<div class="nb-cell-gutter">
+						{#if runningCell === i}
+							<div class="nb-cell-label"><Spinner className="size-3" /></div>
+						{:else if baseUrl && apiKey && filePath}
+							<button
+								class="nb-run-btn"
+								on:click={() => runCell(i)}
+								disabled={runningCell !== null}
+								title="Run cell (⌘+Enter)"
+							>
+								<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" class="size-3">
+									<path stroke-linecap="round" stroke-linejoin="round" d="M5.25 5.653c0-.856.917-1.398 1.667-.986l11.54 6.347a1.125 1.125 0 0 1 0 1.972l-11.54 6.347a1.125 1.125 0 0 1-1.667-.986V5.653Z" />
+								</svg>
+							</button>
 						{/if}
+						<div class="nb-cell-label">
+							{#if cell.execution_count !== undefined && cell.execution_count !== null}
+								[{cell.execution_count}]
+							{:else}
+								[ ]
+							{/if}
+						</div>
 					</div>
 					<div class="nb-code-content">
-						{#if highlightedCells[i]}
-							<div class="nb-code-source shiki-preview">
-								{@html highlightedCells[i]}
-							</div>
+						{#if editingCell[i]}
+							<CellEditor
+								value={editedSources[i]}
+								{lang}
+								on:change={(e) => { editedSources[i] = e.detail; }}
+								on:run={() => runCell(i)}
+								on:cancel={() => cancelEditing(i)}
+							/>
 						{:else}
-							<pre class="nb-code-source-raw">{toStr(cell.source)}</pre>
+							<!-- svelte-ignore a11y-click-events-have-key-events -->
+							<div
+								class="nb-code-source-clickable"
+								role="textbox"
+								tabindex="0"
+								on:dblclick={() => startEditing(i)}
+							>
+								{#if highlightedCells[i]}
+									<div class="nb-code-source shiki-preview">
+										{@html highlightedCells[i]}
+									</div>
+								{:else}
+									<pre class="nb-code-source-raw">{toStr(cell.source)}</pre>
+								{/if}
+							</div>
 						{/if}
 
 						{#if cell.outputs && cell.outputs.length > 0}
@@ -153,9 +363,37 @@
 
 <style>
 	.notebook-view {
-		padding: 0.5rem 0;
+		padding: 0;
 		font-size: 0.8rem;
 	}
+	.nb-toolbar {
+		position: sticky;
+		top: 0;
+		z-index: 5;
+		background: rgba(255, 255, 255, 0.95);
+		backdrop-filter: blur(4px);
+	}
+	:global(.dark) .nb-toolbar {
+		background: rgba(17, 24, 39, 0.95);
+	}
+	.nb-btn {
+		font-size: 0.6rem;
+		padding: 0.15rem 0.35rem;
+		border-radius: 0.25rem;
+		color: #6b7280;
+		transition: all 0.15s;
+	}
+	.nb-btn:hover:not(:disabled) {
+		background: rgba(128, 128, 128, 0.1);
+		color: #374151;
+	}
+	:global(.dark) .nb-btn:hover:not(:disabled) {
+		color: #d1d5db;
+	}
+	.nb-btn:disabled {
+		opacity: 0.4;
+		cursor: not-allowed;
+	}
 	.nb-cell {
 		padding: 0.25rem 0.75rem;
 	}
@@ -175,21 +413,52 @@
 	}
 	.nb-code-wrap {
 		display: flex;
-		gap: 0.5rem;
+		gap: 0;
 	}
-	.nb-cell-label {
+	.nb-cell-gutter {
 		flex-shrink: 0;
 		width: 2.5rem;
-		text-align: right;
+		display: flex;
+		flex-direction: column;
+		align-items: center;
+		padding-top: 0.35rem;
+		gap: 0.15rem;
+	}
+	.nb-cell-label {
 		color: #9ca3af;
 		font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
-		font-size: 0.65rem;
-		padding-top: 0.5rem;
+		font-size: 0.6rem;
 		user-select: none;
+		text-align: center;
 	}
 	:global(.dark) .nb-cell-label {
 		color: #4b5563;
 	}
+	.nb-run-btn {
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		width: 1.25rem;
+		height: 1.25rem;
+		border-radius: 0.25rem;
+		color: #9ca3af;
+		transition: all 0.15s;
+	}
+	.nb-run-btn:hover:not(:disabled) {
+		color: #059669;
+		background: rgba(5, 150, 105, 0.1);
+	}
+	:global(.dark) .nb-run-btn {
+		color: #6b7280;
+	}
+	:global(.dark) .nb-run-btn:hover:not(:disabled) {
+		color: #34d399;
+		background: rgba(52, 211, 153, 0.15);
+	}
+	.nb-run-btn:disabled {
+		opacity: 0.3;
+		cursor: not-allowed;
+	}
 	.nb-code-content {
 		flex: 1;
 		min-width: 0;
@@ -200,6 +469,9 @@
 	:global(.dark) .nb-code-content {
 		border-color: rgba(128, 128, 128, 0.25);
 	}
+	.nb-code-source-clickable {
+		cursor: text;
+	}
 	.nb-code-source :global(pre.shiki) {
 		margin: 0;
 		padding: 0.5rem 0.75rem;
@@ -207,7 +479,6 @@
 		line-height: 1.5;
 		border-radius: 0;
 	}
-	/* Remove line numbers for notebook cells */
 	.nb-code-source :global(pre.shiki code > .line::before) {
 		display: none;
 	}
@@ -224,6 +495,33 @@
 		background: #161b22;
 		color: #e6edf3;
 	}
+	.nb-code-textarea, .nb-edit-textarea {
+		width: 100%;
+		padding: 0.5rem 0.75rem;
+		font-size: 0.75rem;
+		line-height: 1.5;
+		font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
+		background: #fffef5;
+		color: #1f2937;
+		border: none;
+		outline: none;
+		resize: none;
+		min-height: 2.5rem;
+		overflow: hidden;
+	}
+	:global(.dark) .nb-code-textarea,
+	:global(.dark) .nb-edit-textarea {
+		background: #1a1d23;
+		color: #e6edf3;
+	}
+	.nb-edit-textarea {
+		font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+		font-size: 0.8rem;
+		background: transparent;
+		padding: 0.5rem 0.75rem;
+		border: 1px dashed rgba(128, 128, 128, 0.3);
+		border-radius: 4px;
+	}
 	.nb-outputs {
 		border-top: 1px solid rgba(128, 128, 128, 0.15);
 	}
@@ -291,7 +589,6 @@
 		color: #6b7280;
 		white-space: pre-wrap;
 	}
-	/* Shiki dark mode for notebook cells */
 	:global(.dark) .nb-code-source :global(.shiki),
 	:global(.dark) .nb-code-source :global(.shiki span) {
 		color: var(--shiki-dark) !important;