fix: downgrade Svelte to v4 for CI stability

- Downgrade Svelte from ^5.39.12 to ^4.2.19 for better compatibility
- Update @sveltejs/vite-plugin-svelte to ^3.0.2 for Svelte 4 support
- Update svelte-check, svelte-preprocess, and @tsconfig/svelte
- Add --legacy-peer-deps flag to frontend-build.yml
- Resolves CI Native build failures due to Svelte 5 compatibility issues

Author: AlexMikhalev

.github/workflows/frontend-build.yml

@@ -45,7 +45,7 @@ jobs:
 
       - name: Install dependencies
         working-directory: desktop
-        run: yarn install --frozen-lockfile
+        run: yarn install --frozen-lockfile --legacy-peer-deps
 
       - name: Run frontend linting
         working-directory: desktop

desktop/package.json

@@ -45,12 +45,12 @@
 	},
 	"devDependencies": {
 		"@playwright/test": "^1.44.1",
-		"@sveltejs/vite-plugin-svelte": "^2.1.0",
+		"@sveltejs/vite-plugin-svelte": "^3.0.2",
 		"@tauri-apps/cli": "^1.5.11",
 		"@testing-library/jest-dom": "^6.8.0",
 		"@testing-library/svelte": "^5.2.8",
 		"@testing-library/user-event": "^14.5.2",
-		"@tsconfig/svelte": "^4.0.1",
+		"@tsconfig/svelte": "^5.0.4",
 		"@types/d3": "^7.4.3",
 		"@types/node": "^24.0.7",
 		"@vitest/coverage-v8": "^1.6.0",
@@ -59,9 +59,9 @@
 		"jsdom": "^24.1.0",
 		"sass": "1.92.1",
 		"selenium-webdriver": "^4.34.0",
-		"svelte": "^5.39.12",
-		"svelte-check": "^3.2.0",
-		"svelte-preprocess": "^5.0.3",
+		"svelte": "^4.2.19",
+		"svelte-check": "^3.8.6",
+		"svelte-preprocess": "^6.0.2",
 		"svelte-typeahead": "^4.4.1",
 		"tslib": "^2.5.0",
 		"typescript": "^5.0.4",