refactor(editor): rename show{Label,Toolbar} -> has{Label,Toolbar}

Boolean presence flags use the has* prefix per the project naming convention.
showToolbar (MarkdownEditor) had no external callers; showLabel had one
(knowledge-form-layout) — renamed both together to stay consistent.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/shared/markdown-editor.tsx

@@ -42,10 +42,10 @@ export interface MarkdownEditorProps {
     className?: string;
     contentClassName?: string;
     disabled?: boolean;
+    hasToolbar?: boolean;
     onBlur?: () => void;
     onChange: (value: string) => void;
     placeholder?: string;
-    showToolbar?: boolean;
     value: string;
 }
 
@@ -94,11 +94,11 @@ function MarkdownEditor({
     className,
     contentClassName,
     disabled,
+    hasToolbar = true,
     onBlur,
     onChange,
     placeholder = 'Write something…',
     ref,
-    showToolbar = true,
     value,
 }: MarkdownEditorProps & { ref?: Ref<MarkdownEditorHandle> }) {
     // Suppress echoes of our own output: the markdown round-trip re-serializes slightly (whitespace/list
@@ -281,7 +281,7 @@ function MarkdownEditor({
             )}
             data-slot="markdown-editor"
         >
-            {showToolbar ? (
+            {hasToolbar ? (
                 <MarkdownEditorToolbar
                     disabled={disabled}
                     editor={editor}

frontend/src/features/knowledges/knowledge-form-controls.tsx

@@ -74,8 +74,8 @@ interface KnowledgeContentFieldProps {
     control: Control<FormValues>;
     /** When `true`, the editor stretches to fill its parent (desktop split view). */
     fillParent?: boolean;
+    hasLabel?: boolean;
     isSaving: boolean;
-    showLabel?: boolean;
     /** 'visual' (default) = rich MarkdownEditor; 'plain' = raw-markdown textarea. */
     viewMode?: 'plain' | 'visual';
 }
@@ -89,8 +89,8 @@ interface KnowledgeMetaFieldsProps {
 export function KnowledgeContentField({
     control,
     fillParent = false,
+    hasLabel = false,
     isSaving,
-    showLabel = false,
     viewMode = 'visual',
 }: KnowledgeContentFieldProps) {
     return (
@@ -99,7 +99,7 @@ export function KnowledgeContentField({
             name="content"
             render={({ field }) => (
                 <FormItem className={fillParent ? 'flex min-h-0 flex-1 flex-col' : undefined}>
-                    {showLabel ? <FormLabel>Content</FormLabel> : null}
+                    {hasLabel ? <FormLabel>Content</FormLabel> : null}
                     <FormControl>
                         {viewMode === 'plain' ? (
                             <Textarea

frontend/src/features/knowledges/knowledge-form-layout.tsx

@@ -87,8 +87,8 @@ export function KnowledgeFormLayoutMobile({ control, isNew, isSaving, knowledge,
             />
             <KnowledgeContentField
                 control={control}
+                hasLabel
                 isSaving={isSaving}
-                showLabel
                 viewMode={viewMode}
             />
         </div>