fix: keep aspect ratio flow

web/src/lib/components/fields/schema/DimensionField.svelte

@@ -11,7 +11,7 @@
 		label: string;
 		value: unknown;
 		spec: FieldSpec;
-		onchange?: (value: Dimension) => void;
+		onchange?: (value: Dimension, axis?: "width" | "height") => void;
 	}
 	let { label, value, spec, onchange }: Props = $props();
 
@@ -31,7 +31,7 @@
 	});
 
 	function setAxis(axis: "width" | "height", n: number) {
-		onchange?.({ ...current, [axis]: n });
+		onchange?.({ ...current, [axis]: n }, axis);
 	}
 </script>
 

web/src/lib/components/schema/SchemaFields.svelte

@@ -30,7 +30,7 @@
 		spec: FieldSpec;
 		toolId: string;
 		fieldId: string;
-		onchange?: (value: unknown) => void;
+		onchange?: (value: unknown, axis?: "width" | "height") => void;
 	}
 
 	const FIELDS: Record<FieldSpecKind, Component<FieldControlProps>> = {
@@ -54,7 +54,7 @@
 		schema: ToolSchema<Record<string, unknown>>;
 		values: Record<string, unknown>;
 		toolId: string;
-		onchange: (id: string, value: unknown) => void;
+		onchange: (id: string, value: unknown, axis?: "width" | "height") => void;
 		onreset: () => void;
 	}
 	let { schema, values, toolId, onchange, onreset }: Props = $props();
@@ -80,7 +80,7 @@
 				spec={schema.fields[id].spec}
 				{toolId}
 				fieldId={id}
-				onchange={(v) => onchange(id, v)}
+				onchange={(v, axis) => onchange(id, v, axis)}
 			/>
 		{/each}
 	</div>

web/src/lib/components/schema/SchemaToolView.svelte

@@ -17,6 +17,8 @@
 		applySourceDefaults,
 		defaultSchemaParams,
 		sanitizeSchemaParams,
+		withAspectLock,
+		type Dimension,
 		type ToolSchema,
 	} from "$lib/registry-schema";
 	import { downloadZip } from "$lib/zip";
@@ -42,6 +44,8 @@
 	// Поля, изменённые пользователем: при загрузке нового файла им не даём
 	// перезаписаться source-дефолтами. Reset снимает пометку.
 	const touched = new SvelteSet<string>();
+	// Последняя правленая ось dimension-поля — ведущая при lockAspect.
+	const lastAxis: Record<string, "width" | "height"> = {};
 	let source = $state<PixelImage | null>(null);
 	let result = $state<PixelImage | null>(null);
 	let fileResult = $state<FileResult | null>(null);
@@ -70,9 +74,38 @@
 		values = defaultSchemaParams(schema);
 	}
 
-	function setValue(id: string, value: unknown) {
+	function setValue(id: string, value: unknown, axis?: "width" | "height") {
 		touched.add(id);
-		values = { ...values, [id]: value };
+		if (axis) lastAxis[id] = axis;
+		const next: Record<string, unknown> = { ...values, [id]: value };
+		const spec = schema?.fields[id]?.spec;
+		if (source && schema && spec) {
+			const aspect = source.width / source.height;
+			if (
+				spec.kind === "dimension" &&
+				spec.lockAspectWith &&
+				next[spec.lockAspectWith] === true
+			) {
+				next[id] = withAspectLock(
+					value as Dimension,
+					lastAxis[id] ?? "width",
+					aspect,
+				);
+			} else if (spec.kind === "checkbox" && value === true) {
+				// Включили lockAspect — сразу подгоняем привязанные поля под аспект.
+				for (const [fid, f] of Object.entries(schema.fields)) {
+					const fs = f.spec;
+					if (fs.kind === "dimension" && fs.lockAspectWith === id) {
+						next[fid] = withAspectLock(
+							next[fid] as Dimension,
+							lastAxis[fid] ?? "width",
+							aspect,
+						);
+					}
+				}
+			}
+		}
+		values = next;
 	}
 
 	function reset() {