fix(47-02): add Settings label to chevron, remove bg when collapsed, remove bottom rounding on expanded preview

Chevron toggle now shows "Settings" text and has no background when
collapsed so it floats below the node edge. Solid bg only appears on
the expanded content area. Preview container switches from rounded-lg
to rounded-t-lg when parameters are expanded so the settings area
connects seamlessly to the image above.

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

src/components/nodes/GenerateImageNode.tsx

@@ -601,7 +601,7 @@ export function GenerateImageNode({ id, data, selected }: NodeProps<NanoBananaNo
         Image
       </div>
 
-      <div className="relative w-full h-full min-h-0 overflow-hidden rounded-lg">
+      <div className={`relative w-full h-full min-h-0 overflow-hidden ${inlineParametersEnabled && isParamsExpanded ? "rounded-t-lg" : "rounded-lg"}`}>
         {/* Preview area */}
         {nodeData.outputImage ? (
           <>

src/components/nodes/GenerateVideoNode.tsx

@@ -659,7 +659,7 @@ export function GenerateVideoNode({ id, data, selected }: NodeProps<GenerateVide
         Video
       </div>
 
-      <div className="relative w-full h-full min-h-0 overflow-hidden rounded-lg">
+      <div className={`relative w-full h-full min-h-0 overflow-hidden ${inlineParametersEnabled && isParamsExpanded ? "rounded-t-lg" : "rounded-lg"}`}>
         {/* Preview area */}
         {nodeData.outputVideo ? (
           <>

src/components/nodes/InlineParameterPanel.tsx

@@ -20,18 +20,19 @@ export function InlineParameterPanel({
   nodeId,
 }: InlineParameterPanelProps) {
   return (
-    <div className="w-full bg-[#1a1a1a]">
-      {/* Chevron toggle button */}
+    <div className="w-full">
+      {/* Settings toggle button — no background when collapsed, floats below node edge */}
       <button
         type="button"
         onClick={onToggle}
-        className="nodrag nopan w-full flex items-center justify-center py-1 text-neutral-500 hover:text-neutral-300 transition-colors"
+        className="nodrag nopan w-full flex items-center justify-center gap-1 py-1 text-neutral-500 hover:text-neutral-300 transition-colors"
         aria-label={expanded ? "Collapse parameters" : "Expand parameters"}
         aria-expanded={expanded}
         aria-controls={`params-${nodeId}`}
       >
+        <span className="text-[10px]">Settings</span>
         <svg
-          className="w-3.5 h-3.5 transition-transform duration-200"
+          className="w-3 h-3 transition-transform duration-200"
           style={{ transform: expanded ? "rotate(180deg)" : "rotate(0deg)" }}
           viewBox="0 0 24 24"
           fill="none"
@@ -53,7 +54,7 @@ export function InlineParameterPanel({
           opacity: expanded ? 1 : 0,
         }}
       >
-        <div className="nodrag nopan nowheel px-3 pb-3 rounded-b-lg">
+        <div className="nodrag nopan nowheel bg-[#1a1a1a] px-3 pt-2 pb-3 rounded-b-lg">
           <div className="space-y-1.5 max-w-[280px] mx-auto">{children}</div>
         </div>
       </div>

src/components/nodes/LLMGenerateNode.tsx

@@ -150,7 +150,7 @@ export function LLMGenerateNode({ id, data, selected }: NodeProps<LLMGenerateNod
         data-handletype="text"
       />
 
-      <div className="relative w-full h-full min-h-0 overflow-hidden rounded-lg">
+      <div className={`relative w-full h-full min-h-0 overflow-hidden ${inlineParametersEnabled && isParamsExpanded ? "rounded-t-lg" : "rounded-lg"}`}>
         {nodeData.status === "loading" ? (
           <div className="w-full h-full bg-neutral-900/40 flex items-center justify-center">
             <svg