fix: resolve all 1008 svelte-check type errors across codebase

Add type annotations, JSDoc types, null checks, and proper generics
to eliminate all svelte-check errors. Key changes include:
- Type $state(null) variables to avoid 'never' inference
- Add JSDoc typedefs for plain <script> components
- Fix mongoose model typing with Model<any> to avoid union complexity
- Add App.Error/App.PageState interfaces in app.d.ts
- Fix tuple types to array types in types.ts
- Type catch block errors and API handler params
- Add null safety for DOM queries and optional chaining
- Add standard line-clamp property alongside -webkit- prefix

src/models/Recipe.ts

@@ -175,4 +175,6 @@ const RecipeSchema = new mongoose.Schema(
 RecipeSchema.index({ "translations.en.short_name": 1 });
 RecipeSchema.index({ "translations.en.translationStatus": 1 });
 
-export const Recipe = mongoose.model("Recipe", RecipeSchema);
+let _recipeModel: any;
+try { _recipeModel = mongoose.model("Recipe"); } catch { _recipeModel = mongoose.model("Recipe", RecipeSchema); }
+export const Recipe = _recipeModel as mongoose.Model<any>;