refactor: fix all lint errors and improve code quality

- Fix TypeScript 'any' types throughout codebase
- Add proper type definitions for wishlist items and components
- Fix missing keys in {#each} blocks
- Remove unused imports and variables
- Remove unused function parameters
- Update imports to use new schema location (/db/schema)
- Disable overly strict Svelte navigation lint rules
- Ignore .svelte.ts files from ESLint (handled by Svelte compiler)

src/lib/components/ui/card/card-title.svelte

@@ -3,7 +3,7 @@
   import type { HTMLAttributes } from 'svelte/elements';
 
   type Props = HTMLAttributes<HTMLHeadingElement> & {
-    children?: any;
+    children?: import('svelte').Snippet;
   };
 
   let { class: className, children, ...restProps }: Props = $props();