fix(workspace): remove bullet placeholder and delete indented bullets directly on backspace

frontend/src/features/workspace/WorkspaceView.tsx

@@ -813,12 +813,13 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
         indentBlock(index);
       }
     } else if (e.key === 'Backspace' && (!block.content || block.content === '')) {
-      if ((block.level || 0) > 0) {
+      if (selectedDoc?.blocks && selectedDoc.blocks.length > 1) {
+        e.preventDefault();
+        setSlashBlockId(null);
+        deleteBlockAndFocusPrev(index);
+      } else if ((block.level || 0) > 0) {
         e.preventDefault();
         outdentBlock(block.id);
-      } else if (selectedDoc?.blocks && selectedDoc.blocks.length > 1) {
-        e.preventDefault();
-        deleteBlockAndFocusPrev(index);
       }
     }
   };
@@ -1857,7 +1858,6 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
                           }
                         }
                       }}
-                      placeholder="Bullet-Titel bearbeiten… (Enter für Unterpunkt)"
                       className="w-full bg-transparent text-xl font-bold text-main focus:outline-none placeholder:text-faint"
                     />
                   </div>
@@ -2199,7 +2199,6 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
                                 onBlur={() => resetIdleTimer()}
                                 onChange={(e) => handleContentChange(block, e.target.value)}
                                 onKeyDown={(e) => handleKeyDown(e, block, originalIndex)}
-                                placeholder={isReadOnly ? '' : 'Gedanke schreiben… (/ für Menü, Tab zum Einrücken)'}
                                 className={`w-full bg-transparent text-sm text-main leading-relaxed focus:outline-none resize-none placeholder:text-faint ${
                                   isReadOnly ? 'cursor-default' : ''
                                 }`}