feat: refine metadata catalog workflows

frontend/src/viewers/CtePlanViewer.test.tsx

@@ -176,7 +176,7 @@ test("compacts table, filter, detail, and rationale rows", () => {
   expect(within(rationale!).getByText("Rationale")).toHaveClass("mb-1");
 });
 
-test("shows 'no dependencies' for a CTE with an empty depends_on", () => {
+test("shows 'No dependencies' for a CTE with an empty depends_on", () => {
   render(<CtePlanViewer plan={plan} />);
   expect(screen.getByText(/no dependencies/i)).toBeInTheDocument();
 });

frontend/src/viewers/CtePlanViewer.tsx

@@ -93,7 +93,7 @@ function CteCard({ cte, total }: { cte: CtePlanCte; total: number }) {
                 ))}
               </div>
             ) : (
-              <p className="text-xs text-muted-foreground">no dependencies</p>
+              <p className="text-xs text-muted-foreground">No dependencies</p>
             )}
           </section>
 

frontend/src/viewers/SchemaLinkingViewer.test.tsx

@@ -52,7 +52,7 @@ test("(b) clicking toggle switches to table listing a promoted table name", asyn
 test("(c) oversized linking (>45) shows cap notice", () => {
   render(<SchemaLinkingViewer linking={bigLinking} />);
   expect(
-    screen.getByText(/too many elements for the graph/i)
+    screen.getByText(/too many nodes to display in the graph/i)
   ).toBeInTheDocument();
 });
 

frontend/src/viewers/SchemaLinkingViewer.tsx

@@ -147,7 +147,7 @@ export function SchemaLinkingViewer({ linking }: { linking: SchemaLinking }) {
 
       {oversized && (
         <p className="text-sm text-amber-600">
-          Too many elements for the graph, use the table
+          Too many nodes to display in the graph. Use the table instead.
         </p>
       )}