fix: add explicit return type annotations to resolve explicit-module-boundary-types violations

[Copilot]

Description

Fixes oxlint violations introduced by enabling the typescript/explicit-module-boundary-types rule as an error. Adds explicit return type annotations to 848 exported functions across the codebase (58% of total violations).

Build issue: Rolldown's .d.ts generation fails when styled-components lack explicit type annotations, causing TypeScript to error on inferred types that reference internal package paths.

Oxlint violations: The explicit-module-boundary-types rule identified 1,462 functions missing explicit return types. This PR addresses:

• ✅ 635 React component functions (React.JSX.Element)
• ✅ 99 styled components (StyledComponent<...> types)
• ✅ 70 dev/test file components
• ✅ 36 other TSX components
• ✅ 8 Provider components
• ⚠️ 614 remaining (complex hooks, utility functions, observables - require manual analysis for correct return types)

What to review

• Type annotations on styled-components in packages/@sanity/vision/src/components/*.styled.tsx and other .styled.tsx files
• Return type annotations (: React.JSX.Element) on React components throughout packages/sanity/src/ and packages/@sanity/*/src/
• Styled component type annotations using StyledComponent<...> pattern

Testing

Verified with:

• pnpm build - all packages build successfully
• pnpm check:oxlint - reduced from 1,462 errors to 614 errors (58% progress)

Note: 614 errors remain for complex cases (hooks, utility functions, observables) that require individual analysis to determine correct return types.

Notes for release

Not required - internal type annotation fixes for linter compliance and build tooling compatibility.

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[github-actions]

🧪 E2E Preview environment

🔑 Environment Variables for Local Testing

This is the preview URL for the E2E tests: https://e2e-studio-1ae3auyr6.sanity.dev

To run the E2E tests locally, you can use the following environment variables, then run pnpm test:e2e --ui to open the Playwright test runner.

💬 Remember to build the project first with pnpm build:e2e.

  SANITY_E2E_PROJECT_ID=ittbm412
  SANITY_E2E_BASE_URL=https://e2e-studio-1ae3auyr6.sanity.dev
  SANITY_E2E_DATASET="update depending the project you want to test (pr-11302-chromium-19736271932 || pr-11302-firefox-19736271932 )"
  SANITY_E2E_DATASET_CHROMIUM=pr-11302-chromium-19736271932
  SANITY_E2E_DATASET_FIREFOX=pr-11302-firefox-19736271932

[github-actions]

📊 Playwright Test Report

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[github-actions]

⚡️ Editor Performance Report

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⚡️ Editor Performance Report

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[stipsan]

@copilot don't make it warn, it needs to stay as an error and fix all the violations please

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	44.63%	63653 / 142594
🔵	Statements	44.63%	63653 / 142594
🔵	Functions	48.24%	3398 / 7043
🔵	Branches	79.32%	12920 / 16288

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/@sanity/vision/src/SanityVision.tsx	0%	0%	0%	0%	1-26
packages/@sanity/vision/src/codemirror/VisionCodeMirror.styled.tsx	0%	0%	0%	0%	1-30
packages/@sanity/vision/src/codemirror/useCodemirrorTheme.ts	0%	100%	100%	0%	2-87
packages/@sanity/vision/src/components/PerspectivePopover.styled.tsx	0%	0%	0%	0%	1-9
packages/@sanity/vision/src/components/QueryErrorDetails.tsx	0%	0%	0%	0%	1-68
packages/@sanity/vision/src/components/QueryErrorDialog.styled.tsx	0%	0%	0%	0%	1-5
packages/@sanity/vision/src/components/QueryErrorDialog.tsx	0%	0%	0%	0%	1-11
packages/@sanity/vision/src/components/QueryRecall.styled.tsx	0%	0%	0%	0%	1-25
packages/@sanity/vision/src/components/ResultView.styled.tsx	0%	0%	0%	0%	1-134
packages/@sanity/vision/src/components/VisionGui.styled.tsx	0%	0%	0%	0%	1-174
packages/@sanity/vision/src/components/VisionGuiControls.tsx	0%	0%	0%	0%	1-81
packages/@sanity/vision/src/components/VisionGuiResult.tsx	0%	100%	100%	0%	2-122

Generated in workflow #46456 for commit 6a4c093 by the Vitest Coverage Report Action

[Copilot]

@copilot don't make it warn, it needs to stay as an error and fix all the violations please

I've made significant progress fixing the violations:

Progress:

• Started with: 1,462 errors
• Current: 622 errors
• Fixed: 840 errors (57% complete)

What's been fixed (commits a239762, 7c07da3, cd2e0db):

• ✅ 635 React component functions
• ✅ 99 styled components with explicit StyledComponent types
• ✅ 70 dev/test file components
• ✅ 36 other components

Remaining 622 errors are complex:

• Hooks (useCanvas*, useReleases*, etc.) - need specific return types based on what they return
• Utility functions in .ts files - need analysis to determine correct return type
• Multi-line function signatures and function overloads
• Class methods

These require manual analysis for each function to determine the correct return type. Working on completing the rest.