Add split typecheck scripts for build and tests (#1539)

yarn typescript did not check the tests folder before. This PR aims to
resolve that.

## Summary
- add `typecheck`, `typecheck:build`, and `typecheck:tests` scripts
- keep build-only typechecks for Vite compile/type flows
- add `tsconfig.tests.json` and update docs

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-1539-Add-split-typecheck-scripts-for-build-and-tests-2ea6d73d365081f890cfdb1a0a861fbd)
by [Unito](https://www.unito.io)

Author: benceruleanlu

AGENTS.md

@@ -25,7 +25,7 @@
 ```bash
 yarn lint              # Check & auto-fix ESLint issues
 yarn format            # Auto-format code
-yarn typescript        # TypeScript type checking
+yarn typecheck         # TypeScript type checking (all)
 ```
 
 ### Development
@@ -145,7 +145,7 @@ This project must maintain exceptionally high type standards. The `any` type mus
 ## Before Committing
 
 1. Use `yarn format` to ensure consistent formatting
-1. Run `yarn lint` and `yarn typescript` to check code quality
+1. Run `yarn lint` and `yarn typecheck` to check code quality
 1. Run `yarn test:unit` to ensure unit tests pass
 1. Consider running `yarn test:e2e` for UI changes
 

package.json

@@ -52,10 +52,12 @@
     "test:unit": "vitest run",
     "todesktop:afterPack": "./scripts/todesktop/afterPack.cjs",
     "todesktop:beforeInstall": "./scripts/todesktop/beforeInstall.cjs",
-    "typescript": "tsc -p tsconfig.build.json",
+    "typecheck": "tsc -p tsconfig.json",
+    "typecheck:build": "tsc -p tsconfig.build.json",
+    "typecheck:tests": "tsc -p tsconfig.tests.json",
     "verify:build": "node scripts/verifyBuild.js",
-    "vite:compile": "yarn run typescript && vite build && vite build --config vite.preload.config.ts",
-    "vite:types": "yarn run typescript && vite build --config vite.types.config.ts && node scripts/prepareTypes.js",
+    "vite:compile": "yarn run typecheck:build && vite build && vite build --config vite.preload.config.ts",
+    "vite:types": "yarn run typecheck:build && vite build --config vite.types.config.ts && node scripts/prepareTypes.js",
     "release:types": "node scripts/releaseTypes.js",
     "update:frontend": "node scripts/updateFrontend.js"
   },

tsconfig.tests.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["tests/**/*", "playwright.config.ts", "playwright.setup.ts"]
+}