fix: webview-ui tsconfig build errors

- Add 'incremental: true' to satisfy tsBuildInfoFile requirement
- Remove noUncheckedSideEffectImports (TS 5.6+ feature not available in CI)
- Remove test-only types from tsconfig.app.json

This fixes the CI build failures introduced by PR #8931.

webview-ui/tsconfig.app.json

@@ -1,5 +1,6 @@
 {
 	"compilerOptions": {
+		"incremental": true,
 		"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
 		"target": "ES2022",
 		"useDefineForClassFields": true,
@@ -8,10 +9,6 @@
 			"DOM",
 			"DOM.Iterable"
 		],
-		"types": [
-			"vitest/globals",
-			"@testing-library/jest-dom"
-		],
 		"module": "ESNext",
 		"skipLibCheck": true,
 
@@ -26,7 +23,6 @@
 		/* Linting */
 		"strict": true,
 		"noFallthroughCasesInSwitch": true,
-		"noUncheckedSideEffectImports": true,
 
 		/* Aliasing */
 		"baseUrl": ".",

webview-ui/tsconfig.node.json

@@ -1,5 +1,6 @@
 {
 	"compilerOptions": {
+		"incremental": true,
 		"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
 		"target": "ES2022",
 		"lib": [
@@ -19,8 +20,7 @@
 		"strict": true,
 		"noUnusedLocals": true,
 		"noUnusedParameters": true,
-		"noFallthroughCasesInSwitch": true,
-		"noUncheckedSideEffectImports": true
+		"noFallthroughCasesInSwitch": true
 	},
 	"include": [
 		"vite.config.ts"