FN-5875: fix hidden usage row count

Keep the usage indicator's hidden-row toggle in sync with rendered duplicate windows.

- count hidden usage rows from the currently rendered provider windows instead of persisted label entries
- preserve the Show hidden button when duplicate live windows share a stored hidden label
- add a regression test covering duplicate Daily windows with persisted hidden state

Files changed:
 .../dashboard/app/components/UsageIndicator.tsx    | 12 ++++++-
 .../components/__tests__/UsageIndicator.test.tsx   | 42 ++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)

Fusion-Task-Id: FN-5875

Fusion-Task-Lineage: 648f9cb9-ea0a-4573-b08f-b1a412a46ae4

packages/dashboard/app/components/UsageIndicator.tsx

@@ -170,6 +170,16 @@ function isWindowHidden(
   return hidden[providerName]?.includes(windowLabel) ?? false;
 }
 
+function getRenderedHiddenWindowCount(
+  providerName: string,
+  windows: UsageWindow[],
+  hidden: Record<string, string[]>
+): number {
+  return windows.reduce((count, window) => {
+    return count + (isWindowHidden(providerName, window.label, hidden) ? 1 : 0);
+  }, 0);
+}
+
 interface UsageWindowRowProps {
   window: UsageWindow;
   viewMode: 'used' | 'remaining';
@@ -404,7 +414,7 @@ function ProviderCard({
   onMoveUp,
   onMoveDown,
 }: ProviderCardProps) {
-  const hiddenCount = hiddenWindows[provider.name]?.length ?? 0;
+  const hiddenCount = getRenderedHiddenWindowCount(provider.name, provider.windows, hiddenWindows);
   const getStatusBadge = () => {
     switch (provider.status) {
       case "ok":

packages/dashboard/app/components/__tests__/UsageIndicator.test.tsx

@@ -938,6 +938,48 @@ describe("UsageIndicator", () => {
     expect(screen.getByTestId("usage-show-hidden-btn")).toHaveTextContent("Show hidden (1)");
   });
 
+  it("counts currently rendered hidden rows when persisted labels match duplicate live windows", () => {
+    localStorage.setItem(
+      USAGE_HIDDEN_WINDOWS_KEY,
+      JSON.stringify({ Anthropic: ["Daily"] })
+    );
+
+    mockUseUsageData.mockReturnValue({
+      providers: [
+        {
+          name: "Anthropic",
+          icon: "🅰️",
+          status: "ok",
+          windows: [
+            {
+              label: "Daily",
+              percentUsed: 20,
+              percentLeft: 80,
+              resetText: "resets in 1h",
+              resetMs: 3600000,
+            },
+            {
+              label: "Daily",
+              percentUsed: 60,
+              percentLeft: 40,
+              resetText: "resets in 4h",
+              resetMs: 14400000,
+            },
+          ],
+        },
+      ],
+      loading: false,
+      error: null,
+      lastUpdated: new Date(),
+      refresh: mockRefresh,
+    });
+
+    render(<UsageIndicator isOpen={true} onClose={mockOnClose} projectId={TEST_PROJECT_ID} />);
+
+    expect(document.querySelectorAll(".usage-window--hidden")).toHaveLength(2);
+    expect(screen.getByTestId("usage-show-hidden-btn")).toHaveTextContent("Show hidden (2)");
+  });
+
   it("renders show hidden button inline within provider info", () => {
     mockUseUsageData.mockReturnValue({
       providers: mockProviders,