Feature: Add file removal and print area edit toggles to photo upload

- Add 'Modify print area →' button to navigate from file selection to print area editor
- Add 'Remove' button to clear selected file and start over
- Add '← Back to file' button in print area editor to return and change files
- Persist print area settings while toggling between views

Users can now more easily manage their image uploads and refine the print area
without losing their settings or being locked into a workflow.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/components/PhotoPrintAreaField.tsx

@@ -10,7 +10,9 @@ const MIN_SIZE = 6; // percent
 export default function PhotoPrintAreaField({ variant = 'front' }: { variant?: 'front' | 'back' }) {
   const [previewUrl, setPreviewUrl] = useState<string | null>(null);
   const [box, setBox] = useState<Box>(DEFAULT_BOX);
+  const [showPrintAreaEditor, setShowPrintAreaEditor] = useState(false);
   const containerRef = useRef<HTMLDivElement>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
   const dragState = useRef<{
     mode: 'move' | 'resize';
     startX: number;
@@ -25,10 +27,24 @@ export default function PhotoPrintAreaField({ variant = 'front' }: { variant?: '
     const file = e.target.files?.[0];
     if (!file) {
       setPreviewUrl(null);
+      setShowPrintAreaEditor(false);
       return;
     }
     setPreviewUrl(URL.createObjectURL(file));
     setBox(DEFAULT_BOX);
+    setShowPrintAreaEditor(true);
+  };
+
+  const handleClearFile = () => {
+    setPreviewUrl(null);
+    setShowPrintAreaEditor(false);
+    if (fileInputRef.current) {
+      fileInputRef.current.value = '';
+    }
+  };
+
+  const handleBackToFile = () => {
+    setShowPrintAreaEditor(false);
   };
 
   const onBoxMouseDown = (e: React.MouseEvent) => {
@@ -73,31 +89,64 @@ export default function PhotoPrintAreaField({ variant = 'front' }: { variant?: '
 
   return (
     <div>
-      <input
-        id={fieldName}
-        name={fieldName}
-        type="file"
-        accept="image/*"
-        onChange={handleFileChange}
-        className="w-full border border-line bg-paper px-3 py-2 text-sm"
-      />
-      {variant === 'front' ? (
-        <p className="mt-1 text-xs text-muted">
-          Uploading a real photo replaces the illustration everywhere this product is shown. One
-          tradeoff: the color swatches below can no longer recolor a photo the way they recolor the
-          illustration — they&apos;ll still be saved with each order, but the picture itself stays
-          fixed. Leave this blank to keep using the illustration (which does recolor live).
-        </p>
-      ) : (
-        <p className="mt-1 text-xs text-muted">
-          If set, customers get a Front/Back toggle and can add a separate design to the back —
-          drag a print-area box below just like the front.
-        </p>
-      )}
+      {!previewUrl || !showPrintAreaEditor ? (
+        <>
+          <input
+            ref={fileInputRef}
+            id={fieldName}
+            name={fieldName}
+            type="file"
+            accept="image/*"
+            onChange={handleFileChange}
+            className="w-full border border-line bg-paper px-3 py-2 text-sm"
+          />
+          {variant === 'front' ? (
+            <p className="mt-1 text-xs text-muted">
+              Uploading a real photo replaces the illustration everywhere this product is shown. One
+              tradeoff: the color swatches below can no longer recolor a photo the way they recolor the
+              illustration — they&apos;ll still be saved with each order, but the picture itself stays
+              fixed. Leave this blank to keep using the illustration (which does recolor live).
+            </p>
+          ) : (
+            <p className="mt-1 text-xs text-muted">
+              If set, customers get a Front/Back toggle and can add a separate design to the back —
+              drag a print-area box below just like the front.
+            </p>
+          )}
 
-      {previewUrl && (
+          {previewUrl && !showPrintAreaEditor && (
+            <div className="mt-3 flex gap-2">
+              <button
+                type="button"
+                onClick={() => setShowPrintAreaEditor(true)}
+                className="text-sm text-clay hover:text-clay-dark font-medium"
+              >
+                Modify print area →
+              </button>
+              <button
+                type="button"
+                onClick={handleClearFile}
+                className="text-sm text-splash-pink hover:text-splash-pink-dark font-medium"
+              >
+                Remove
+              </button>
+            </div>
+          )}
+        </>
+      ) : null}
+
+      {previewUrl && showPrintAreaEditor && (
         <div className="mt-4">
-          <p className="tag-label mb-2">Drag the box to mark the print area</p>
+          <div className="flex items-center justify-between mb-2">
+            <p className="tag-label">Drag the box to mark the print area</p>
+            <button
+              type="button"
+              onClick={handleBackToFile}
+              className="text-sm text-clay hover:text-clay-dark font-medium"
+            >
+              ← Back to file
+            </button>
+          </div>
           <p className="mb-2 text-xs text-muted">
             Cropped to a square here — that&apos;s the same crop the design tool uses, so the box
             lines up correctly.