Contain circuit editor scrolling

src/frontend/components/circuit-tree-editor.tsx

@@ -482,7 +482,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
       setAnchorRowKey(null);
     }
     setSelectedCell({ rowKey: row.rowKey, cellKey });
-    requestAnimationFrame(() => containerRef.current?.focus());
+    focusGridWithoutScroll();
   }
 
   // Captures semantic identity for post-reload focus restoration.
@@ -556,7 +556,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
     }
     await loadTree({ showLoading: false });
     if (!intent) {
-      requestAnimationFrame(() => containerRef.current?.focus());
+      focusGridWithoutScroll();
     }
   }
 
@@ -779,7 +779,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
     if (resolved) {
       setSelectedCell(resolved);
     }
-    requestAnimationFrame(() => containerRef.current?.focus());
+    focusGridWithoutScroll();
   }, [data, editableCells, visibleRows]);
 
   // Restores multi-selected device rows after operations that rebuild row keys.
@@ -870,6 +870,10 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
     return row?.cells.find((cell) => cell.cellKey === cellKey);
   }
 
+  function focusGridWithoutScroll() {
+    requestAnimationFrame(() => containerRef.current?.focus({ preventScroll: true }));
+  }
+
   // Opens edit session for selected cell.
   // Enter/F2/double-click use selectExisting; type-to-edit uses replaceWithTypedChar.
   function startEdit(cell: SelectedCell, mode: StartEditMode, typedChar?: string) {
@@ -1169,7 +1173,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
     }
     setEditingCell(null);
     setSelectedCell({ rowKey: editingCell.rowKey, cellKey: editingCell.cellKey });
-    requestAnimationFrame(() => containerRef.current?.focus());
+    focusGridWithoutScroll();
   }
 
   async function handleAddReserveCircuit(sectionId: string, afterCircuitId?: string) {
@@ -3164,7 +3168,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
                                 const active = document.activeElement as HTMLElement | null;
                                 if (!active || !containerRef.current?.contains(active)) {
                                   setEditingCell(null);
-                                  requestAnimationFrame(() => containerRef.current?.focus());
+                                  focusGridWithoutScroll();
                                 }
                               });
                             }}