fix(canvas): restrict prompt layer height for long input and enable scrolling for node prompts

web/src/components/canvas/canvas-config-composer.tsx

@@ -126,7 +126,7 @@ export function CanvasConfigComposer({ value, inputs, onChange, onClose }: Canva
                     ref={editorRef}
                     contentEditable
                     suppressContentEditableWarning
-                    className="thin-scrollbar min-h-28 w-full overflow-y-auto whitespace-pre-wrap break-words px-3 py-2 text-sm leading-7 outline-none"
+                    className="thin-scrollbar min-h-28 max-h-72 w-full overflow-y-auto overscroll-contain whitespace-pre-wrap break-words px-3 py-2 text-sm leading-7 outline-none"
                     style={{ color: theme.node.text }}
                     onInput={() => {
                         if (!composingRef.current) syncFromEditor();

web/src/components/canvas/canvas-node-prompt-panel.tsx

@@ -58,6 +58,7 @@ export function CanvasNodePromptPanel({ node, isRunning, onPromptChange, onConfi
 
     return (
         <div
+            data-canvas-no-zoom
             className="rounded-2xl border p-3 shadow-2xl backdrop-blur"
             style={{ background: theme.toolbar.panel, borderColor: theme.toolbar.border, color: theme.node.text }}
             onMouseDown={(event) => event.stopPropagation()}