Show selected percentile in agentic x-axis titles for Interactivity / E2E Latency / 智能体场景 Interactivity 与 E2E Latency x 轴标题显示所选百分位

[cquil11]

What changed

• On agentic scenarios only, the x-axis titles for the regular Interactivity and E2E Latency x-axis modes now carry the selected latency percentile — e.g. "P90 Interactivity (tok/s/user)", "P75 End-to-end Latency (s)".
• Extracted the agentic label rewrite in useChartData.stableChartDefinitions into an exported pure helper applyAgenticPercentileToXLabel(label, pctlWord): it prefixes the percentile when the configured label has no leading statistic word, and still replaces an existing prefix (e.g. the TTFT override label "P90 Time To First Token (s)" → "P75 …") without double-prefixing.
• Unit tests (useChartData.test.ts): prefix on interactivity/e2e labels, p75 switch, replace-not-double on existing prefixes, Median/Mean replacement, no-op when already correct, mid-label statistic words untouched.
• Cypress (ttft-x-axis-toggle.cy.ts): asserts "P90 Interactivity (tok/s/user)" and "P90 End-to-end Latency (s)" render in the chart SVG on agentic, "P75 Interactivity (tok/s/user)" after switching the percentile selector, no percentile prefix on the fixed-seq default scenario, and the same "P90 Interactivity (tok/s/user)" label with an ?unofficialrun= overlay loaded.

Why

• Agentic scenarios plot percentile fields (p75_intvty/p90_intvty, p75_e2el/p90_e2el). The chart heading, the TTFT mode label, and the derived-mode labels already show the percentile, but the base Interactivity / E2E Latency axis titles rendered the raw config labels ("Interactivity (tok/s/user)") because the previous rewrite only replaced an existing leading percentile word — the base config labels have none, so nothing was added.
• Fixed-sequence (non-agentic) labels are unchanged (isAgentic guard at the call site).
• Overlay support: works for both official runs and ?unofficialrun= overlays — the overlay path renders on the same base chart and ChartDisplay passes graph.chartDefinition.x_label from the same stableChartDefinitions output, so one fix covers both; verified with a Cypress overlay assertion. /zh pages reuse the English axis label for these modes (technical terms with units, same as the existing TTFT label behavior), so no zh-side change is needed.

中文说明

• 仅在智能体（agentic）场景下，常规 Interactivity 与 E2E Latency x 轴模式的坐标轴标题现在会带上所选延迟百分位，例如 "P90 Interactivity (tok/s/user)"、"P75 End-to-end Latency (s)"。
• 将 useChartData.stableChartDefinitions 中的标签改写逻辑提取为导出的纯函数 applyAgenticPercentileToXLabel(label, pctlWord)：配置标签没有统计词前缀时补上所选百分位；已有前缀（如 TTFT 覆盖标签 "P90 Time To First Token (s)" → "P75 …"）时替换而不重复叠加。
• 单元测试（useChartData.test.ts）覆盖：interactivity/e2e 标签加前缀、切换到 p75、已有前缀时替换不重复、Median/Mean 替换、标签已正确时不变、标签中间的统计词不受影响。
• Cypress（ttft-x-axis-toggle.cy.ts）断言：agentic 下图表 SVG 渲染 "P90 Interactivity (tok/s/user)" 与 "P90 End-to-end Latency (s)"；切换百分位后显示 "P75 Interactivity (tok/s/user)"；固定序列默认场景不带百分位前缀；加载 ?unofficialrun= 叠加时同样显示带百分位的标签。
• 原因：agentic 场景绘制的是百分位字段（p75_intvty/p90_intvty、p75_e2el/p90_e2el），图表标题、TTFT 模式及派生模式的标签均已显示百分位，唯独这两个基础模式的轴标题仍是原始配置标签——原有改写只替换已存在的前缀，而基础标签没有前缀，因此未生效。固定序列标签保持不变。叠加路径复用同一 chartDefinition 标签，一处修复同时覆盖官方与非官方运行；/zh 页面沿用英文轴标签（含单位的技术术语，与现有 TTFT 标签行为一致），无需额外改动。

🤖 Generated with Claude Code

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Note

Low Risk
Display-only label logic gated to agentic sequences; fixed-seq and data plumbing are untouched.

Overview
Agentic Interactivity and E2E Latency x-axis titles now include the selected latency percentile (e.g. P90 Interactivity (tok/s/user)), matching the percentile fields actually plotted. Fixed-sequence scenarios are unchanged.

The prior inline label rewrite only replaced an existing leading statistic word, so base config labels without a prefix never got a percentile. That logic is extracted into applyAgenticPercentileToXLabel, which prefixes when needed and still replaces Median/Mean/P90-style prefixes without doubling.

Tests: Vitest covers the helper; Cypress asserts SVG axis text for agentic modes, p75 after percentile change, no prefix on fixed-seq default, and the same labels with unofficial-run overlays. Derived-metrics stubs were extended and wired earlier in suite setup to avoid loading skeletons when defaults fetch derived metrics.

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