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

frontend/src/test/components/MedDetailModal.test.tsx

@@ -706,7 +706,7 @@ describe("MedDetailModal bottle package type", () => {
 		expect(screen.getByText(/refill\.pillsToAdd/i)).toBeInTheDocument();
 
 		// Should NOT show packs label in refill
-		const refillModal = document.querySelector(".refill-modal");
+		const _refillModal = document.querySelector(".refill-modal");
 		// Packs label should not be present for bottle type
 		expect(screen.queryByText("refill.packs")).not.toBeInTheDocument();
 	});