fix: match outer wrapper bg to node body and let fields resize on narrow nodes

- Change outer wrapper bg from #2a2a2a to bg-neutral-800 to match node body,
  eliminating visible color mismatch at rounded corners
- Remove overflow-hidden from InlineParameterPanel (was clipping fields)
- Use min(180px, 100%) in grid minmax so columns shrink to fit narrow nodes

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

src/components/nodes/BaseNode.tsx

@@ -180,7 +180,7 @@ export function BaseNode({
   return (
     <div
       className={hasExpandedSettings
-        ? `relative flex flex-col w-full h-full overflow-visible bg-[#2a2a2a] rounded-lg ${selected ? "ring-2 ring-blue-500/40 shadow-lg shadow-blue-500/25" : ""}`
+        ? `relative flex flex-col w-full h-full overflow-visible bg-neutral-800 rounded-lg ${selected ? "ring-2 ring-blue-500/40 shadow-lg shadow-blue-500/25" : ""}`
         : "contents"}
       onDoubleClick={handleResizeHandleDblClick}
     >

src/components/nodes/InlineParameterPanel.tsx

@@ -49,7 +49,7 @@ export function InlineParameterPanel({
       {expanded && (
         <div
           id={`params-${nodeId}`}
-          className="nodrag nopan nowheel bg-[#2a2a2a] px-3 pt-2 pb-3 rounded-b-lg overflow-hidden"
+          className="nodrag nopan nowheel bg-[#2a2a2a] px-3 pt-2 pb-3 rounded-b-lg"
         >
           {children}
         </div>

src/components/nodes/ModelParameters.tsx

@@ -227,7 +227,7 @@ export function ModelParameters({
         <div
           ref={gridRef}
           className={useGrid
-            ? "grid grid-cols-[repeat(auto-fill,minmax(180px,1fr))] max-w-[640px] mx-auto gap-x-6 gap-y-1.5"
+            ? "grid grid-cols-[repeat(auto-fill,minmax(min(180px,100%),1fr))] max-w-[640px] mx-auto gap-x-6 gap-y-1.5"
             : "space-y-1.5 max-w-[280px]"
           }
         >