enhance(frontend): テーマの適用管理を改善 (#17376)

* wip

* add test

* use themeManager.currentCompiledTheme for obtaining theme variables / reduce getComputedStyle usage

* fix

* fix: better error handling on theme installation

* Update Changelog

* chore: remove frontend-shared builds as it is currently working as a stub package

* fix: broken lockfile

* fix

* fix lint

* fix

packages/frontend/test/tsconfig.json

@@ -23,7 +23,8 @@
 		"resolveJsonModule": true,
 		"isolatedModules": true,
 		"paths": {
-			"@/*": ["../src/*"]
+			"@/*": ["../src/*"],
+			"@@/*": ["../../frontend-shared/*"]
 		},
 		"typeRoots": [
 			"../node_modules/@types"
@@ -37,6 +38,7 @@
 	"compileOnSave": false,
 	"include": [
 		"./**/*.ts",
-		"../src/**/*.vue"
+		"../src/**/*.vue",
+		"../@types/**/*.d.ts"
 	]
 }