Fix Vue property conflicts in PlatformServiceMixin implementation

- Remove duplicate property declarations from TopMessage component
- Use (this as any) type assertion for mixin methods
- Resolves 'Data property already defined' warnings
- Fixes 'this.dbQuery is not a function' runtime errors

src/main.web.ts

@@ -5,9 +5,13 @@ const platform = process.env.VITE_PLATFORM;
 const pwa_enabled = process.env.VITE_PWA_ENABLED === "true";
 
 // Debug: Check SharedArrayBuffer availability
-console.log(`[SharedArrayBuffer] Available: ${typeof SharedArrayBuffer !== 'undefined'}`);
+console.log(
+  `[SharedArrayBuffer] Available: ${typeof SharedArrayBuffer !== "undefined"}`,
+);
 console.log(`[Browser] User Agent: ${navigator.userAgent}`);
-console.log(`[Headers] Check COOP/COEP in Network tab if SharedArrayBuffer is false`);
+console.log(
+  `[Headers] Check COOP/COEP in Network tab if SharedArrayBuffer is false`,
+);
 
 // Only import service worker for web builds
 if (pwa_enabled) {