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/Dropdown.svelte

@@ -1,5 +1,4 @@
 <script lang="ts">
-  import { Button } from '$lib/components/ui/button';
   import { scale } from 'svelte/transition';
   import { cubicOut } from 'svelte/easing';
   import type { Snippet } from 'svelte';
@@ -98,7 +97,7 @@
       transition:scale={{ duration: 150, start: 0.95, opacity: 0, easing: cubicOut }}
     >
       <div class="py-1">
-        {#each items as item}
+        {#each items as item (item.value)}
           <button
             type="button"
             class="w-full text-left px-4 py-2 text-sm transition-colors"