refactor(dashboard): simplify account pool overview

[kslr]

我对仪表盘的可支撑时间页面做了调整，之前的需要单独的去展开，文案也不够清晰。

顺带也做了其他调整，如果有不合适的我也可以退回

1. 移除了 账号池概览，因为和指标重复
2. 将原来的可支撑改为指标卡，文案调整为只有三种： 可支撑 x 小时，可支撑 1天+，等待数据
3. 移除了 系统健康状态，因为和请求趋势类似

旧：

新

Summary by CodeRabbit

• New Features

  • Added an always-visible pool runway statistic to the dashboard, including runway duration, dispatchable accounts, and unknown status indicators.
  • Dashboard data now refreshes automatically every 15 seconds.

• Improvements

  • Simplified the account status layout into a compact statistics grid.
  • Updated English and Simplified Chinese dashboard labels for account availability, runway, and refresh status.
  • Changed the live indicator to a static dot.

• Removed

  • Removed the expandable pool runway and system health sections.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 3ab02f1e-917b-4a6e-abcc-49596555b3d6

📥 Commits

Reviewing files that changed from the base of the PR and between dd105d5 and bfb0566.

📒 Files selected for processing (7)

• frontend/src/components/PoolRunwayCard.tsx
• frontend/src/components/StatCard.tsx
• frontend/src/components/SystemHealthBar.tsx
• frontend/src/components/TimeRangeSelector.tsx
• frontend/src/locales/en.json
• frontend/src/locales/zh.json
• frontend/src/pages/Dashboard.tsx

💤 Files with no reviewable changes (2)

• frontend/src/components/SystemHealthBar.tsx
• frontend/src/components/PoolRunwayCard.tsx

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📝 Walkthrough

Walkthrough

The dashboard now always loads runway inputs, computes and refreshes runway status, and displays it in the account-status stats grid. Legacy runway and system-health components are removed, localization keys are simplified, and the live badge uses a static indicator.

Changes

Dashboard status experience

Layer / File(s)	Summary
Runway data loading and refresh frontend/src/pages/Dashboard.tsx	Dashboard always fetches account and operations data, computes runway state with selectPoolRunway, and refreshes the calculation on an interval.
Account status and runway cards frontend/src/pages/Dashboard.tsx, frontend/src/components/StatCard.tsx	The hero summary becomes an account-status grid, and StatCard accepts arbitrary ReactNode values for combined metric displays.
Legacy status UI and localization cleanup frontend/src/components/PoolRunwayCard.tsx, frontend/src/components/SystemHealthBar.tsx, frontend/src/pages/Dashboard.tsx, frontend/src/locales/*.json	Legacy runway and system-health paths are removed, while dashboard labels are updated for the new account, refresh, and runway presentation.
Static live indicator frontend/src/components/TimeRangeSelector.tsx	The live badge dot is no longer animated and its comment describes the auto-refresh status.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Possibly related PRs

• james-6-23/codex2api#336: Updates the shared StatCard component’s props and styling.
• james-6-23/codex2api#386: Introduces the pool-runway logic that this dashboard presentation now uses.

Suggested reviewers: james-6-23

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main dashboard refactor and accurately summarizes the simplified account pool overview.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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