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## Summary Replace all runtime `isElectron()` function calls with the build-time `isDesktop` constant from `@/platform/distribution/types`, enabling dead-code elimination in non-desktop builds. ## Changes - **What**: Migrate 30 files from runtime `isElectron()` detection (checking `window.electronAPI`) to the compile-time `isDesktop` constant (driven by `__DISTRIBUTION__` Vite define). Remove `isElectron` from `envUtil.ts`. Update `isNativeWindow()` to use `isDesktop`. Guard `electronAPI()` calls behind `isDesktop` checks in stores. Update 7 test files to use `vi.hoisted` + getter mock pattern for per-test `isDesktop` toggling. Add `DISTRIBUTION=desktop` to `dev:electron` script. ## Review Focus - The `electronDownloadStore.ts` now guards the top-level `electronAPI()` call behind `isDesktop` to prevent crashes on non-desktop builds. - Test mocking pattern uses `vi.hoisted` with a getter to allow per-test toggling of the `isDesktop` value. - Pre-existing issues not addressed: `as ElectronAPI` cast in `envUtil.ts`, `:class="[]"` in `BaseViewTemplate.vue`, `@ts-expect-error` in `ModelLibrarySidebarTab.vue`. - This subsumes PR #8627 and renders PR #6122 and PR #7374 obsolete. ┆Issue is synchronized with this [Notion page](https://www.notion.so/PR-8710-refactor-replace-runtime-isElectron-with-build-time-isDesktop-constant-3006d73d365081c08037f0e61c2f6c77) by [Unito](https://www.unito.io)