fix(ui): replace form submit with explicit key and click handlers in image block

- remove form element and onSubmit in favor of a plain div
- add handleKeyDown to trigger submit on Enter key press
- attach onClick handler directly to the insert button with type="button"

src/shared/components/BlockEditor/blockTypes/Image.client.js

@@ -18,12 +18,18 @@ function ImageBlock({ block, onChange, disabled }) {
     }
   }, [block.src, disabled]);
 
-  function submit(e) {
-    e.preventDefault();
+  function submit() {
     if (!url.trim()) return;
     onChange?.({ src: url.trim() });
   }
 
+  function handleKeyDown(e) {
+    if (e.key === 'Enter') {
+      e.preventDefault();
+      submit();
+    }
+  }
+
   function handleAltChange(e) {
     onChange?.({ alt: e.target.value });
   }
@@ -39,10 +45,7 @@ function ImageBlock({ block, onChange, disabled }) {
 
   if (!block.src) {
     return (
-      <form
-        onSubmit={submit}
-        className="flex items-center gap-2 rounded-lg border border-dashed border-neutral-300 dark:border-neutral-700 bg-neutral-50 dark:bg-neutral-800/40 px-3 py-3"
-      >
+      <div className="flex items-center gap-2 rounded-lg border border-dashed border-neutral-300 dark:border-neutral-700 bg-neutral-50 dark:bg-neutral-800/40 px-3 py-3">
         <Image01Icon width={18} height={18} className="text-neutral-500" />
         <input
           ref={inputRef}
@@ -50,17 +53,19 @@ function ImageBlock({ block, onChange, disabled }) {
           placeholder="URL de l'image (https://…)"
           value={url}
           onChange={(e) => setUrl(e.target.value)}
+          onKeyDown={handleKeyDown}
           disabled={disabled}
           className="flex-1 px-2 py-1 text-sm rounded border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-neutral-900 dark:text-white outline-none focus:border-blue-500"
         />
         <button
-          type="submit"
+          type="button"
+          onClick={submit}
           disabled={disabled || !url.trim()}
           className="px-3 py-1 text-sm rounded bg-blue-600 hover:bg-blue-700 disabled:opacity-50 disabled:hover:bg-blue-600 text-white"
         >
           Insérer
         </button>
-      </form>
+      </div>
     );
   }