fix: use RichEditor with readOnly prop instead of raw HTML for locked/invalidated offers

RichEditor now supports readOnly prop — hides toolbar and disables
editing via ReactQuill's built-in readOnly. Content renders with
proper Quill CSS (list margins, indentation, fonts) instead of
broken browser defaults from dangerouslySetInnerHTML.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/admin/components/RichEditor.tsx

@@ -64,23 +64,25 @@ interface RichEditorProps {
   onChange: (value: string) => void
   placeholder?: string
   minHeight?: string
+  readOnly?: boolean
 }
 
 export default function RichEditor({
   value,
   onChange,
   placeholder = 'Obsah...',
-  minHeight = '120px'
+  minHeight = '120px',
+  readOnly = false,
 }: RichEditorProps) {
   const quillRef = useRef<ReactQuill>(null)
   const lastValueRef = useRef(value)
 
   const modules = useMemo(() => ({
-    toolbar: TOOLBAR,
+    toolbar: readOnly ? false : TOOLBAR,
     clipboard: {
       matchVisual: false,
     },
-  }), [])
+  }), [readOnly])
 
   const handleChange = useCallback((content: string, _delta: any, source: string) => {
     if (source !== 'user') return
@@ -99,6 +101,7 @@ export default function RichEditor({
         modules={modules}
         formats={FORMATS}
         placeholder={placeholder}
+        readOnly={readOnly}
       />
     </div>
   )

src/admin/pages/OfferDetail.tsx

@@ -1097,22 +1097,13 @@ export default function OfferDetail() {
 
                   <div style={{ marginTop: '0.5rem' }}>
                     <label className="admin-form-label">Obsah</label>
-                    {(isInvalidated || isLockedByOther) ? (
-                      <div className="rich-editor">
-                        <div
-                          className="ql-editor"
-                          style={{ minHeight: '80px', background: 'var(--bg-primary)', border: '1px solid var(--border-color)', borderRadius: 'var(--border-radius-sm)', cursor: 'default', overflowWrap: 'anywhere', wordBreak: 'break-word' }}
-                          dangerouslySetInnerHTML={{ __html: section.content || '<em style="color: var(--text-tertiary)">Prázdný obsah</em>' }}
-                        />
-                      </div>
-                    ) : (
                     <RichEditor
                       value={section.content}
                       onChange={(val) => setSections(prev => prev.map((s, i) => i === idx ? { ...s, content: val } : s))}
                       placeholder="Obsah sekce..."
                       minHeight="120px"
+                      readOnly={isInvalidated || isLockedByOther}
                     />
-                    )}
                   </div>
                 </div>
               ))}