feat(overview): fit the matrix on one screen and present it full screen / 一屏信息总览与全屏演示

packages/app/cypress/e2e/overview.cy.ts

@@ -24,6 +24,8 @@ const MATRIX_ROWS = 8;
 const AGENTX = 'agentx';
 const AGENTX_LABEL = 'Long Context Multi-Turn Realistic Agentic Scenario (AgentX)';
 const AGENTX_LABEL_ZH = '长上下文多轮真实智能体场景（AgentX）';
+/** Shared by both locales: the scenario is named after its acronym. */
+const AGENTX_SHORT = 'AgentX';
 
 const PAGE_TITLE = 'Inference Cost per Million Tokens';
 const PAGE_TITLE_ZH = '推理每百万 token 成本';
@@ -61,6 +63,21 @@ function expectNoHorizontalScroller(testId: string) {
   });
 }
 
+/**
+ * The row header shows the acronym so the 22%-wide model column stays one line,
+ * and keeps the full scenario name for assistive tech and the hover title. Both
+ * strings are in the cell, so assert the two layers rather than their
+ * concatenation. Scenarios already named by a short label render one node.
+ */
+function expectAgentxScenario(fullLabel: string) {
+  cy.get('[data-testid="overview-model-scenario"]')
+    .should('have.attr', 'title', fullLabel)
+    .within(() => {
+      cy.get('.sr-only').should('have.text', fullLabel);
+      cy.get('[aria-hidden="true"]').should('have.text', AGENTX_SHORT);
+    });
+}
+
 /** Visible dates and snapshot framing must be gone; evidence stays in labels. */
 function expectNoVisibleDatesOrSnapshot() {
   cy.get('[data-testid="overview-pair-evidence-date"]').should('not.exist');
@@ -354,10 +371,12 @@ describe('Overview page', () => {
     cy.viewport(1280, 900);
     cy.visit('/zh/overview?models=all');
 
-    cy.get('[data-testid="overview-model-scope-toggle"]').should(
-      'contain.text',
-      '隐藏已弃用与维护模式模型',
-    );
+    // The chip carries the short label; the full sentence stays on the
+    // accessible name and hover title.
+    cy.get('[data-testid="overview-model-scope-toggle"]')
+      .should('contain.text', '隐藏停用模型')
+      .find('[data-overview-model-scope="default"]')
+      .should('have.attr', 'aria-label', '隐藏已弃用与维护模式模型');
     desktopModel('gpt-oss-120b')
       .find('[data-testid="overview-model-category-badge"]')
       .should('contain.text', '已弃用')
@@ -415,8 +434,11 @@ describe('Overview page', () => {
     cy.viewport(1280, 900);
     cy.visit('/overview');
 
-    cy.get('[data-testid="overview-page"]')
-      .children('[data-testid="overview-comparison-switcher"]')
+    // The tabs sit inside the surface handed to the Fullscreen API so that
+    // presenting keeps them with the matrix, which costs them their old spot as
+    // a direct child of the page.
+    cy.get('[data-testid="overview-presentation-surface"]')
+      .find('[data-testid="overview-comparison-switcher"]')
       .should('have.length', 1)
       .and('have.class', 'justify-center');
     cy.get('[data-testid="overview-comparison-switcher"]')
@@ -631,6 +653,48 @@ describe('Overview page', () => {
     }
   });
 
+  // Clicking the control, not just building its href: the matrix reads from a
+  // client data cache, and a cache keyed without the row params moves the
+  // address bar while leaving every row on screen.
+  it('narrows the matrix when the row filter is clicked in either comparison mode', () => {
+    cy.viewport(1280, 900);
+
+    for (const [href, attribute, key, sentence] of [
+      ['/overview?compare=30d', 'data-overview-row-scope', 'rows=changed', 'no 30-day change'],
+      [
+        '/overview',
+        'data-overview-hardware-row-scope',
+        'hwrows=priced',
+        'no result on any platform',
+      ],
+    ] as const) {
+      cy.visit(href);
+      cy.get('[data-testid="overview-desktop-model"]').should('have.length', MATRIX_ROWS);
+
+      cy.get(`a[${attribute}]`)
+        .should('contain.text', 'Hide ')
+        .invoke('text')
+        .then((label) => {
+          const hidden = Number(/\d+/.exec(label)?.[0]);
+          expect(hidden, `hidden row count in "${label}"`).to.be.greaterThan(0);
+
+          cy.get(`a[${attribute}]`).click();
+          cy.location('search').should('contain', key);
+          cy.get('[data-testid="overview-desktop-model"]').should(
+            'have.length',
+            MATRIX_ROWS - hidden,
+          );
+          // The action label names the click, so it flips once the scope
+          // lands; the chip keeps the short label and the counted sentence
+          // rides the accessible name.
+          cy.get(`a[${attribute}]`)
+            .should('contain.text', 'Show all rows')
+            .and('contain.text', String(hidden))
+            .and('have.attr', 'aria-label', `Show ${hidden} rows with ${sentence}`);
+        });
+    }
+  });
+
   it('defaults to community engine scope and switches with canonical links preserving tier and locale', () => {
     cy.viewport(1280, 900);
     cy.visit('/overview');
@@ -660,7 +724,7 @@ describe('Overview page', () => {
     });
 
     desktopModel('GLM-5.2').within(() => {
-      cy.get('[data-testid="overview-model-scenario"]').should('have.text', AGENTX_LABEL);
+      expectAgentxScenario(AGENTX_LABEL);
       cy.get('[data-testid="overview-pair-missing"]').should('have.length', 5);
     });
     cy.get(
@@ -900,9 +964,9 @@ describe('Overview page', () => {
       cy.get('[data-testid="overview-desktop-matrix"]').should('contain.text', label);
     }
     for (const model of ['Kimi-K3', 'GLM-5.2']) {
-      desktopModel(model)
-        .find('[data-testid="overview-model-scenario"]')
-        .should('have.text', AGENTX_LABEL);
+      desktopModel(model).within(() => {
+        expectAgentxScenario(AGENTX_LABEL);
+      });
     }
     for (const model of ['DeepSeek-V4-Pro', 'MiniMax-M3', 'Qwen-3.5-397B-A17B']) {
       desktopModel(model, SINGLE_TURN)
@@ -925,7 +989,7 @@ describe('Overview page', () => {
     });
 
     desktopModel('DeepSeek-V4-Pro', AGENTX).within(() => {
-      cy.get('[data-testid="overview-model-scenario"]').should('have.text', AGENTX_LABEL);
+      expectAgentxScenario(AGENTX_LABEL);
       cy.contains('DeepSeek V4 Pro 1.6T').should('exist');
       // Priced from the AgentX rows alone — the single-turn sweep never leaks in.
       cy.get(
@@ -1440,14 +1504,14 @@ describe('Overview page', () => {
         .and('have.attr', 'title', '缺少可比较的 B200 基线');
     });
     desktopModel('GLM-5.2').within(() => {
-      cy.get('[data-testid="overview-model-scenario"]').should('have.text', AGENTX_LABEL_ZH);
+      expectAgentxScenario(AGENTX_LABEL_ZH);
       cy.get('[data-testid="overview-pair-missing"]').should('have.length', 5);
       platform('b300')
         .find('[data-testid="overview-pair-missing"]')
         .should('contain.text', '该场景暂无数据');
     });
     desktopModel('DeepSeek-V4-Pro', AGENTX).within(() => {
-      cy.get('[data-testid="overview-model-scenario"]').should('have.text', AGENTX_LABEL_ZH);
+      expectAgentxScenario(AGENTX_LABEL_ZH);
       cy.get(
         '[data-testid="overview-pair-value"][data-hardware="b200"] [data-testid="overview-cost-evidence-link"]',
       ).should('have.text', '$0.064');

packages/app/src/app/api/v1/overview/route.test.ts

@@ -37,20 +37,32 @@ describe('GET /api/v1/overview', () => {
     mockGetOverviewPageData.mockResolvedValueOnce(data);
 
     const response = await GET(
-      request('/api/v1/overview?tier=75&engine=all&compare=30d&ref=b300&models=all'),
+      request(
+        '/api/v1/overview?tier=75&engine=all&compare=30d&ref=b300&models=all&rows=changed&hwrows=priced',
+      ),
     );
 
     expect(response.status).toBe(200);
     expect(await response.json()).toEqual(data);
-    expect(mockGetOverviewPageData).toHaveBeenCalledWith(75, 'all', '30d', 'b300', 'all');
+    expect(mockGetOverviewPageData).toHaveBeenCalledWith(
+      75,
+      'all',
+      '30d',
+      'b300',
+      'all',
+      'changed',
+      'priced',
+    );
     expect(mockCachedJson).toHaveBeenCalledWith(data);
   });
 
   it('normalizes unsupported query values to overview defaults', async () => {
     mockGetOverviewPageData.mockResolvedValueOnce({ models: [] });
 
     await GET(
-      request('/api/v1/overview?tier=999&engine=vendor&compare=weekly&ref=h100&models=inactive'),
+      request(
+        '/api/v1/overview?tier=999&engine=vendor&compare=weekly&ref=h100&models=inactive&rows=some&hwrows=blank',
+      ),
     );
 
     expect(mockGetOverviewPageData).toHaveBeenCalledWith(
@@ -59,6 +71,8 @@ describe('GET /api/v1/overview', () => {
       'hardware',
       'b200',
       'default',
+      'all',
+      'all',
     );
   });
 

packages/app/src/app/api/v1/overview/route.ts

@@ -4,8 +4,10 @@ import { cachedJson } from '@/lib/api-cache';
 import {
   resolveOverviewComparisonMode,
   resolveOverviewEngineScope,
+  resolveOverviewHardwareRowScope,
   resolveOverviewModelScope,
   resolveOverviewReferenceHardware,
+  resolveOverviewRowScope,
   resolveOverviewTier,
 } from '@/lib/overview-data';
 import { getOverviewPageData } from '@/lib/overview-data.server';
@@ -22,6 +24,8 @@ export async function GET(request: NextRequest) {
       resolveOverviewComparisonMode(params.get('compare') ?? undefined),
       resolveOverviewReferenceHardware(params.get('ref') ?? undefined),
       resolveOverviewModelScope(params.get('models') ?? undefined),
+      resolveOverviewRowScope(params.get('rows') ?? undefined),
+      resolveOverviewHardwareRowScope(params.get('hwrows') ?? undefined),
     );
     return cachedJson(data);
   } catch (error) {

packages/app/src/app/overview/page.tsx

@@ -7,8 +7,10 @@ import { enAlternates } from '@/lib/i18n';
 import {
   resolveOverviewComparisonMode,
   resolveOverviewEngineScope,
+  resolveOverviewHardwareRowScope,
   resolveOverviewModelScope,
   resolveOverviewReferenceHardware,
+  resolveOverviewRowScope,
   resolveOverviewTier,
 } from '@/lib/overview-data';
 import { getOverviewPageData } from '@/lib/overview-data.server';
@@ -47,6 +49,8 @@ export default async function OverviewPage({ searchParams }: Props) {
     resolveOverviewComparisonMode(sp.compare),
     resolveOverviewReferenceHardware(sp.ref),
     resolveOverviewModelScope(sp.models),
+    resolveOverviewRowScope(sp.rows),
+    resolveOverviewHardwareRowScope(sp.hwrows),
   );
   return <OverviewPageContent data={data} locale="en" />;
 }

packages/app/src/app/zh/overview/page.tsx

@@ -7,8 +7,10 @@ import { ZH_OG_LOCALE, zhAlternates } from '@/lib/i18n';
 import {
   resolveOverviewComparisonMode,
   resolveOverviewEngineScope,
+  resolveOverviewHardwareRowScope,
   resolveOverviewModelScope,
   resolveOverviewReferenceHardware,
+  resolveOverviewRowScope,
   resolveOverviewTier,
 } from '@/lib/overview-data';
 import { getOverviewPageData } from '@/lib/overview-data.server';
@@ -48,6 +50,8 @@ export default async function ZhOverviewPage({ searchParams }: Props) {
     resolveOverviewComparisonMode(sp.compare),
     resolveOverviewReferenceHardware(sp.ref),
     resolveOverviewModelScope(sp.models),
+    resolveOverviewRowScope(sp.rows),
+    resolveOverviewHardwareRowScope(sp.hwrows),
   );
   return <OverviewPageContent data={data} locale="zh" />;
 }

packages/app/src/components/overview/overview-history-window-select.tsx

@@ -11,6 +11,7 @@ import { track } from '@/lib/analytics';
 import type { OverviewHistoryWindowKey } from '@/lib/overview-data';
 
 import { useOverviewComparisonMode, useOverviewNavigation } from './overview-navigation';
+import { useIsPresenting } from './overview-presentation';
 
 interface WindowOption {
   href: string;
@@ -34,6 +35,10 @@ export function OverviewHistoryWindowSelect({
   // back to hardware mode carries no window, so keep the committed one.
   const pendingMode = useOverviewComparisonMode();
   const value = pendingMode === 'hardware' ? committedValue : pendingMode;
+  // Same reason as the reference select: `document.body` sits outside both the
+  // fullscreen element and the CSS `zoom`, so a portalled menu would be
+  // invisible or unscaled while presenting.
+  const presenting = useIsPresenting();
 
   return (
     <Select
@@ -53,7 +58,7 @@ export function OverviewHistoryWindowSelect({
       >
         <SelectValue>{options.find((option) => option.value === value)?.label}</SelectValue>
       </SelectTrigger>
-      <SelectContent align="center">
+      <SelectContent align="center" portalled={!presenting}>
         {options.map((option) => (
           <SelectItem key={option.value} value={option.value} data-overview-window={option.value}>
             {option.label}

packages/app/src/components/overview/overview-nav-link.tsx

@@ -12,7 +12,7 @@ import { useOverviewNavigation } from './overview-navigation';
 const PREFETCH_DWELL_MS = 120;
 
 interface OverviewNavAnalytics {
-  control: 'comparison' | 'engine' | 'models' | 'tier';
+  control: 'comparison' | 'engine' | 'hwrows' | 'models' | 'rows' | 'tier';
   value: string;
 }
 

packages/app/src/components/overview/overview-navigation.test.tsx

@@ -33,6 +33,8 @@ let root: Root;
 let selectTier: (() => void) | undefined;
 let selectEngine: (() => void) | undefined;
 let selectReference: (() => void) | undefined;
+let selectRowScope: (() => void) | undefined;
+let selectHardwareRowScope: (() => void) | undefined;
 let prefetchTier: (() => void) | undefined;
 
 function pageData(tier: OverviewTier): OverviewPageData {
@@ -43,6 +45,10 @@ function pageData(tier: OverviewTier): OverviewPageData {
     comparisonMode: 'hardware',
     referenceHardware: 'b200',
     modelScope: 'default',
+    rowScope: 'all',
+    hardwareRowScope: 'all',
+    unchangedRowCount: 0,
+    emptyRowCount: 0,
     historicalWindow: null,
   };
 }
@@ -54,6 +60,8 @@ function Probe() {
   selectTier = () => navigation.push('/overview?tier=75', ['tier']);
   selectEngine = () => navigation.push('/overview?engine=all', ['engine']);
   selectReference = () => navigation.push('/overview?ref=b300', ['ref']);
+  selectRowScope = () => navigation.push('/overview?compare=30d&rows=changed', ['rows']);
+  selectHardwareRowScope = () => navigation.push('/overview?hwrows=priced', ['hwrows']);
   prefetchTier = () => navigation.prefetch('/overview?tier=75', ['tier']);
   return (
     <>
@@ -105,6 +113,8 @@ afterEach(() => {
   selectTier = undefined;
   selectEngine = undefined;
   selectReference = undefined;
+  selectRowScope = undefined;
+  selectHardwareRowScope = undefined;
   prefetchTier = undefined;
   vi.unstubAllGlobals();
 });
@@ -384,6 +394,32 @@ describe('OverviewNavigationProvider', () => {
     expect(readProbe('reference')).toBe('b300');
   });
 
+  // Both row scopes narrow the rows the server sends, so neither may collapse
+  // into the unfiltered payload's cache key the way `ref` deliberately does.
+  it('requests a narrowed matrix for each row scope instead of reusing the full one', () => {
+    deferredFetch();
+
+    renderProvider(pageData(50), '/overview?compare=30d');
+    act(() => selectRowScope?.());
+
+    expect(fetch).toHaveBeenCalledWith('/api/v1/overview?compare=30d&rows=changed', {
+      headers: { Accept: 'application/json' },
+    });
+    expect(readProbe('pending')).toBe('pending');
+  });
+
+  it('requests a narrowed matrix for the hardware row scope', () => {
+    deferredFetch();
+
+    renderProvider(pageData(50), '/overview');
+    act(() => selectHardwareRowScope?.());
+
+    expect(fetch).toHaveBeenCalledWith('/api/v1/overview?hwrows=priced', {
+      headers: { Accept: 'application/json' },
+    });
+    expect(readProbe('pending')).toBe('pending');
+  });
+
   it('preserves unknown params and the fragment on the first selection', () => {
     deferredFetch();