fix(android): hide overview activity heatmap on mobile (#861)

[HKLHaoBin]

User description

Summary

• Skip getActivityStats() IPC when useMobileLayout() is true so Android / narrow screens do not fetch 365-day activity data.
• Do not render ActivityHeatmapCard on mobile layout, avoiding fixed-width heatmap overflow that broke bottom-nav alignment.
• Desktop Overview behavior and the Theme settings toggle are unchanged.

Closes #861

Test plan

• Android / narrow window (<720px): Overview has no「年度活动」card; no getActivityStats call
• Desktop: heatmap still shows when prefs allow; Theme → activity heatmap toggle still works
• Mobile bottom nav width/alignment OK, no horizontal overflow
• Resize from narrow → wide: heatmap data loads and card appears (effect depends on mobile)

Made with Cursor

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PR Type

Bug fix, Enhancement

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Description

• Skip activity data request when useMobileLayout is true

• Hide ActivityHeatmapCard on narrow screens to avoid overflow

• Fix bottom-nav alignment and improve mobile performance

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Diagram Walkthrough

flowchart LR
    A[Overview.tsx] --> B{mobile layout?}
    B -- Yes --> C[Skip getActivityStats & render]
    B -- No --> D[Fetch activity & show heatmap]

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File Walkthrough

	Relevant files
Bug fix	Overview.tsx Conditionally skip heatmap on mobile                                          openless-all/app/src/pages/Overview.tsx Added early return in useEffect for mobile to skip getActivityStats IPC Conditionally render ActivityHeatmapCard only when not mobile Updated code comments to document the mobile handling (issue fix(android): 移动端隐藏概览页「年度活动」热力图 #861) +11/-5

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[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis ✅ 861 - PR Code Verified Compliant requirements: Android/narrow-screen Overview does not show the "年度活动" card. Android/narrow-screen Overview skips getActivityStats() (early return in useEffect). Desktop Overview rendering condition unchanged (still uses prefs.showOverviewActivityHeatmap and activity data). Desktop Theme toggle remains unaffected. Requires further human verification: Mobile bottom navigation bar alignment and overflow: cannot be confirmed via code review alone; requires manual testing on actual mobile browser/WebView.

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ No major issues detected