feat: remove image preview panel and make manual labeling form full-width

backend/pfm-web-app/src/app/manual-label/page.tsx

@@ -38,12 +38,6 @@ export default function ManualLabelPage() {
     items: [{ kodeBarang: "", namaBarang: "", banyak: "", jumlah: "" }]
   });
 
-  // Transform states
-  const [scale, setScale] = useState<number>(1.0);
-  const [rotation, setRotation] = useState<number>(0);
-  const [isDragging, setIsDragging] = useState<boolean>(false);
-  const dragStart = useRef({ x: 0, y: 0, scrollLeft: 0, scrollTop: 0 });
-  const viewportRef = useRef<HTMLDivElement>(null);
 
   // Status indicators
   const [toast, setToast] = useState<{ message: string; show: boolean; isError: boolean }>({
@@ -109,9 +103,6 @@ export default function ManualLabelPage() {
       }
     };
     
-    // Reset view
-    setScale(1.0);
-    setRotation(0);
     fetchLabel();
   }, [currentIndex, files]);
 
@@ -217,39 +208,6 @@ export default function ManualLabelPage() {
     }
   };
 
-  // Panning functionality
-  const handleMouseDown = (e: React.MouseEvent) => {
-    if (e.target instanceof HTMLImageElement || e.target === viewportRef.current) {
-      setIsDragging(true);
-      const vp = viewportRef.current;
-      if (vp) {
-        dragStart.current = {
-          x: e.pageX - vp.offsetLeft,
-          y: e.pageY - vp.offsetTop,
-          scrollLeft: vp.scrollLeft,
-          scrollTop: vp.scrollTop
-        };
-      }
-    }
-  };
-
-  const handleMouseMove = (e: React.MouseEvent) => {
-    if (!isDragging) return;
-    e.preventDefault();
-    const vp = viewportRef.current;
-    if (vp) {
-      const x = e.pageX - vp.offsetLeft;
-      const y = e.pageY - vp.offsetTop;
-      const walkX = (x - dragStart.current.x) * 1.5;
-      const walkY = (y - dragStart.current.y) * 1.5;
-      vp.scrollLeft = dragStart.current.scrollLeft - walkX;
-      vp.scrollTop = dragStart.current.scrollTop - walkY;
-    }
-  };
-
-  const handleMouseUpOrLeave = () => {
-    setIsDragging(false);
-  };
 
   return (
     <div className="h-screen w-screen flex flex-col bg-slate-950 text-slate-100 overflow-hidden font-sans">
@@ -317,11 +275,11 @@ export default function ManualLabelPage() {
         </div>
       </header>
 
-      {/* Main Split Layout */}
-      <div className="flex-1 flex overflow-hidden w-full">
+      {/* Centered Form Layout */}
+      <div className="flex-1 flex overflow-hidden w-full justify-center bg-slate-950">
         
-        {/* Left Form Viewport */}
-        <div className="w-[45%] border-r border-slate-800 overflow-y-auto p-6 space-y-6 flex flex-col bg-slate-950">
+        {/* Form Viewport */}
+        <div className="w-full max-w-4xl border-x border-slate-800/60 overflow-y-auto p-8 space-y-6 flex flex-col bg-slate-900/10">
           
           {/* Metadata Card */}
           <div className="rounded-xl border border-slate-800 bg-slate-900/40 p-5 space-y-5">
@@ -518,70 +476,6 @@ export default function ManualLabelPage() {
 
         </div>
 
-        {/* Right Image Panning Viewport */}
-        <div className="w-[55%] bg-slate-950 flex flex-col relative select-none">
-          <div
-            ref={viewportRef}
-            onMouseDown={handleMouseDown}
-            onMouseMove={handleMouseMove}
-            onMouseUp={handleMouseUpOrLeave}
-            onMouseLeave={handleMouseUpOrLeave}
-            className="flex-1 overflow-auto flex items-center justify-center cursor-grab active:cursor-grabbing p-6"
-          >
-            {files[currentIndex] ? (
-              <img
-                src={`/test-images/${files[currentIndex]}`}
-                alt={files[currentIndex]}
-                style={{
-                  transform: `scale(${scale}) rotate(${rotation}deg)`,
-                  transformOrigin: "center center",
-                  transition: isDragging ? "none" : "transform 0.1s ease-out"
-                }}
-                draggable={false}
-                className="max-w-[90%] max-h-[90%] object-contain rounded shadow-2xl shadow-black/80 border border-slate-900"
-              />
-            ) : (
-              <div className="text-slate-500 text-sm font-medium">Select an image to load</div>
-            )}
-          </div>
-
-          {/* Interactive controls */}
-          <div className="absolute bottom-6 right-6 flex items-center gap-2 px-3 py-1.5 bg-slate-900/90 backdrop-blur-md border border-slate-800 rounded-full shadow-lg shadow-black/40">
-            <button
-              onClick={() => setScale(s => Math.min(4.0, s + 0.15))}
-              title="Zoom In"
-              className="w-8 h-8 rounded-full flex items-center justify-center text-sm hover:bg-slate-800 active:scale-95 text-slate-100"
-            >
-              ➕
-            </button>
-            <button
-              onClick={() => setScale(s => Math.max(0.2, s - 0.15))}
-              title="Zoom Out"
-              className="w-8 h-8 rounded-full flex items-center justify-center text-sm hover:bg-slate-800 active:scale-95 text-slate-100"
-            >
-              ➖
-            </button>
-            <button
-              onClick={() => {
-                setScale(1.0);
-                setRotation(0);
-              }}
-              title="Reset View"
-              className="w-8 h-8 rounded-full flex items-center justify-center text-sm hover:bg-slate-800 active:scale-95 text-slate-100"
-            >
-              🔄
-            </button>
-            <button
-              onClick={() => setRotation(r => (r + 90) % 360)}
-              title="Rotate Clockwise"
-              className="w-8 h-8 rounded-full flex items-center justify-center text-sm hover:bg-slate-800 active:scale-95 text-slate-100"
-            >
-              ↪️
-            </button>
-          </div>
-
-        </div>
-
       </div>
 
       {/* Alert toast notifications */}