🤖 feat: Replace tsc with tsgo for 7.7x faster type checking (#260)

## Summary

Replace TypeScript's tsc with tsgo (TypeScript's new Go-based compiler)
for significantly faster type checking in the build system.

## Performance Improvement

- **Before (tsc):** 5.942s
- **After (tsgo):** 0.776s  
- **Result: 7.7x faster type checking** ⚡

## Changes

### Dependencies
- Added `@typescript/native-preview` devDependency (includes
platform-specific binaries automatically)

### Configuration
- Updated `tsconfig.json` to be compatible with TypeScript 7:
  - Removed deprecated `baseUrl` option
  - Fixed `paths` to use relative paths (`./src/*` instead of `src/*`)

### Build System
- Updated `scripts/typecheck.sh` to use tsgo with automatic fallback to
tsc
- Updated `Makefile` dev target to use tsgo in watch mode for faster
development feedback

## About tsgo

tsgo is Microsoft's Go-based TypeScript compiler that will become the
default in TypeScript 7. It provides:
- Same type checking accuracy as tsc
- 7-10x performance improvement
- Native binary execution for better startup time

The implementation uses bun runtime which correctly detects arm64
architecture, and includes fallback to tsc for compatibility.

## Testing

Type checking verified locally:
```bash
$ time ./scripts/typecheck.sh
[0] bun run node_modules/@typescript/native-preview/bin/tsgo.js --noEmit exited with code 0
[1] bun run node_modules/@typescript/native-preview/bin/tsgo.js --noEmit -p tsconfig.main.json exited with code 0

real    0m0.776s
user    0m2.406s
sys     0m0.638s
```

_Generated with `cmux`_

Author: ammar-agent

Makefile

@@ -54,9 +54,9 @@ help: ## Show this help message
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-20s\033[0m %s\n", $$1, $$2}'
 
 ## Development
-dev: node_modules/.installed build-main ## Start development server (Vite + TypeScript watcher)
+dev: node_modules/.installed build-main ## Start development server (Vite + tsgo watcher for 10x faster type checking)
 	@bun x concurrently -k \
-		"bun x concurrently \"bun x tsc -w -p tsconfig.main.json\" \"bun x tsc-alias -w -p tsconfig.main.json\"" \
+		"bun x concurrently \"bun run node_modules/@typescript/native-preview/bin/tsgo.js -w -p tsconfig.main.json\" \"bun x tsc-alias -w -p tsconfig.main.json\"" \
 		"vite"
 
 start: node_modules/.installed build-main build-preload build-static ## Build and start Electron app
@@ -135,8 +135,17 @@ lint: node_modules/.installed ## Run ESLint (typecheck runs in separate target)
 lint-fix: node_modules/.installed ## Run linter with --fix
 	@./scripts/lint.sh --fix
 
-typecheck: node_modules/.installed src/version.ts ## Run TypeScript type checking
-	@./scripts/typecheck.sh
+typecheck: node_modules/.installed src/version.ts ## Run TypeScript type checking (uses tsgo for 10x speedup)
+	@if [ -f "node_modules/@typescript/native-preview/bin/tsgo.js" ]; then \
+		bun x concurrently -g \
+			"bun run node_modules/@typescript/native-preview/bin/tsgo.js --noEmit" \
+			"bun run node_modules/@typescript/native-preview/bin/tsgo.js --noEmit -p tsconfig.main.json"; \
+	else \
+		echo "⚠️  tsgo not found, falling back to tsc (slower)"; \
+		bun x concurrently -g \
+			"tsc --noEmit" \
+			"tsc --noEmit -p tsconfig.main.json"; \
+	fi
 
 ## Testing
 test-integration: node_modules/.installed ## Run all tests (unit + integration)

bun.lock

@@ -50,6 +50,7 @@
         "@types/write-file-atomic": "^4.0.3",
         "@typescript-eslint/eslint-plugin": "^8.44.1",
         "@typescript-eslint/parser": "^8.44.1",
+        "@typescript/native-preview": "^7.0.0-dev.20251014.1",
         "@vitejs/plugin-react": "^4.0.0",
         "concurrently": "^8.2.0",
         "dotenv": "^17.2.3",
@@ -652,6 +653,22 @@
 
     "@typescript-eslint/visitor-keys": ["@typescript-eslint/[email protected]", "", { "dependencies": { "@typescript-eslint/types": "8.46.0", "eslint-visitor-keys": "^4.2.1" } }, "sha512-FrvMpAK+hTbFy7vH5j1+tMYHMSKLE6RzluFJlkFNKD0p9YsUT75JlBSmr5so3QRzvMwU5/bIEdeNrxm8du8l3Q=="],
 
+    "@typescript/native-preview": ["@typescript/[email protected]", "", { "optionalDependencies": { "@typescript/native-preview-darwin-arm64": "7.0.0-dev.20251014.1", "@typescript/native-preview-darwin-x64": "7.0.0-dev.20251014.1", "@typescript/native-preview-linux-arm": "7.0.0-dev.20251014.1", "@typescript/native-preview-linux-arm64": "7.0.0-dev.20251014.1", "@typescript/native-preview-linux-x64": "7.0.0-dev.20251014.1", "@typescript/native-preview-win32-arm64": "7.0.0-dev.20251014.1", "@typescript/native-preview-win32-x64": "7.0.0-dev.20251014.1" }, "bin": { "tsgo": "bin/tsgo.js" } }, "sha512-IqmX5CYCBqXbfL+HKlcQAMaDlfJ0Z8OhUxvADFV2TENnzSYI4CuhvKxwOB2wFSLXufVsgtAlf3Fjwn24KmMyPQ=="],
+
+    "@typescript/native-preview-darwin-arm64": ["@typescript/[email protected]", "", { "os": "darwin", "cpu": "arm64" }, "sha512-7rQoLlerWnwnvrM56hP4rdEbo4xDE4zr7cch+EzgENq/tbXYereGq1fmnR83UNglb1Eyy53OvJZ3O2csYBa2vg=="],
+
+    "@typescript/native-preview-darwin-x64": ["@typescript/[email protected]", "", { "os": "darwin", "cpu": "x64" }, "sha512-SF29o9NFRGDM23Jz0nVO4/yS78GQ81rtOemmCVNXuJotoY4bP3npGDyEmfkZQHZgDOXogs2OWy3t7NUJ235ANQ=="],
+
+    "@typescript/native-preview-linux-arm": ["@typescript/[email protected]", "", { "os": "linux", "cpu": "arm" }, "sha512-o5cu7h+BBAp6V4qxYY5RWuaYouN3j+MGFLrrUtvvNj4XKM+kbq5qwsgVRsmJZ1LfUvHmzyQs86vt9djAWedzjQ=="],
+
+    "@typescript/native-preview-linux-arm64": ["@typescript/[email protected]", "", { "os": "linux", "cpu": "arm64" }, "sha512-+YWbW/JF4uggEUBr+vflqI5i7bL4Z3XInCOyUO1qQEY7VmfDCsPEzIwGi37O1mixfxw9Qj8LQsptCkU+fqKwGw=="],
+
+    "@typescript/native-preview-linux-x64": ["@typescript/[email protected]", "", { "os": "linux", "cpu": "x64" }, "sha512-3LC4tgcgi6zWJWBUpBNXOGSY3yISJrQezSP/T+v+mQRApkdoIpTSHIyQAhgaagcs3MOQRaqiIPaLOVrdHXdU6A=="],
+
+    "@typescript/native-preview-win32-arm64": ["@typescript/[email protected]", "", { "os": "win32", "cpu": "arm64" }, "sha512-P0D4UEXwzFZh3pHexe2Ky1tW/HjY/HxTBTIajz2ViDCNPw7uDSEsXSB4H9TTiFJw8gVdTUFbsoAQp1MteTeORA=="],
+
+    "@typescript/native-preview-win32-x64": ["@typescript/[email protected]", "", { "os": "win32", "cpu": "x64" }, "sha512-fi53g2ihH7tkQLlz8hZGAb2V+3aNZpcxrZ530CQ4xcWwAqssEj0EaZJX0VLEtIQBar1ttGVK9Pz/wJU9sYyVzg=="],
+
     "@ungap/structured-clone": ["@ungap/[email protected]", "", {}, "sha512-WmoN8qaIAo7WTYWbAZuG8PYEhn5fkz7dZrqTBZ7dtt//lL2Gwms1IcnQ5yHqjDfX8Ft5j4YzDM23f87zBfDe9g=="],
 
     "@unrs/resolver-binding-android-arm-eabi": ["@unrs/[email protected]", "", { "os": "android", "cpu": "arm" }, "sha512-ppLRUgHVaGRWUx0R0Ut06Mjo9gBaBkg3v/8AxusGLhsIotbBLuRk51rAzqLC8gq6NyyAojEXglNjzf6R948DNw=="],

package.json

@@ -76,6 +76,7 @@
     "@types/write-file-atomic": "^4.0.3",
     "@typescript-eslint/eslint-plugin": "^8.44.1",
     "@typescript-eslint/parser": "^8.44.1",
+    "@typescript/native-preview": "^7.0.0-dev.20251014.1",
     "@vitejs/plugin-react": "^4.0.0",
     "concurrently": "^8.2.0",
     "dotenv": "^17.2.3",

scripts/typecheck.sh

@@ -14,9 +14,8 @@
     "allowJs": true,
     "sourceMap": true,
     "inlineSources": true,
-    "baseUrl": ".",
     "paths": {
-      "@/*": ["src/*"]
+      "@/*": ["./src/*"]
     }
   },
   "include": ["src/**/*.tsx", "src/**/*.ts", "tests/**/*.ts"],