[cahangeorge]

Summary

• make shared buttons, menu items, selects, and steppers touch-safe on narrow screens
• keep form controls at mobile-safe text sizing while preserving compact desktop styles
• constrain dialogs, alert dialogs, sheets, dropdowns, and selects to dynamic viewports and safe areas
• add focused regression coverage for the shared mobile primitives

Verification

• npm run check:boundaries
• npm run lint
• npm run typecheck
• npm run test:run (103 Vitest files / 1023 tests; Electron MCP 24; Electron plugins 91; versioning 10)
• npm run build (legacy entry 998.58 KiB, limit 3000 KiB)
• git diff --check

Scope checklist

• Runtime/persistence/UI changes described. If this PR changes runtime behavior,
  persisted data (Store keys, version, partialize, migrate, merge — see
  src/store/persistence/options.ts and ADR 0001), or user-visible UI, describe the
  change and its migration impact below. Architecture-enforcement PRs should have none.
• No new import of a business service directly into src/components/**
  (the ESLint no-restricted-imports / no-restricted-syntax rules and
  check:boundaries enforce this, including dynamic import(); if a component
  genuinely needs a service, add a hook in src/features/*/hooks/**).
• No new import of React/JSX/the Store/any service into src/features/*/application/**
  (static or dynamic).
• No inline eslint-disable to bypass the boundary rules — fix the layering instead.

Runtime / persistence / UI changes (if any)

Shared controls now use 44-pixel mobile targets and 16-pixel form text below the sm
breakpoint, then return to the existing compact desktop dimensions. Overlay primitives
use dynamic viewport bounds, scrolling, and safe-area-aware spacing. There are no data,
Store, or persistence changes and no migration is required.

Notes for reviewers / CodeRabbit

This PR intentionally stays at the shared primitive layer; view-specific responsive
changes are kept out of scope so the behavior can be reviewed independently.

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[AmintaCCCP]

Hi @cahangeorge，

感谢这次贡献。这个 PR 和同一批的 #372–#379 先关闭，暂不继续审。

原因：

1. 这是未征求的移动端大改。本项目主战场是 Electron 桌面端，不是手机 App。没有对应 issue，也没有事先对齐方向。
2. 约两小时内连开 9 个 Draft，评审成本过高。请一次只提一个、已对齐的改动。
3. 多数 PR 基线停在 38714a0（i18n feat: i18n 多语言支持——扩展至 10 种界面语言 #368 之前），feat: add responsive category navigation #372 / feat: improve mobile repository browsing #375–feat: improve mobile settings and QA #379 已与 main 冲突。请基于最新 main（当前 217c134）开分支。

#371 里 defaultCategoryOverrides 的同步缺口如果以后要修，请单独、很小地基于最新 main 再提；mobile 这条线目前不接。

谢谢。