chore: fix lint errors and reduce warnings across codebase (#234)

* chore: fix lint errors and reduce warnings across codebase

- Fix noExplicitAny catches in backend routes and plugins
- Fix noNestedTernary issues in backend services
- Add keyboard event handlers for useKeyWithClickEvents in frontend
- Disable noImportantStyles rule in biome.json
- Fix formatting errors across all changed files
- Fix test file lint issues

Closes #233

* fix: restore any types in test files for TS compatibility

* fix: revert Auth.tsx dependency array changes that caused infinite re-render

* fix: null-safe user.username access in AppContext dependency array

backend/src/plugins/auth.ts

@@ -142,9 +142,12 @@ export async function requireAuth(request: FastifyRequest, reply: FastifyReply)
 			id: user.id,
 			username: user.username,
 		};
-	} catch (err: any) {
+	} catch (err: unknown) {
 		// Re-throw our own errors
-		if (err?.message === "AUTH_REQUIRED" || err?.message === "USER_NOT_FOUND" || err?.message === "ACCOUNT_DISABLED") {
+		if (
+			err instanceof Error &&
+			(err.message === "AUTH_REQUIRED" || err.message === "USER_NOT_FOUND" || err.message === "ACCOUNT_DISABLED")
+		) {
 			throw err;
 		}
 		// JWT verification failed