feat: major dependency upgrades, remove Redis, fix mongoose 9 types

Dependencies upgraded:
- svelte 5.38→5.55, @sveltejs/kit 2.37→2.56, adapter-node 5.3→5.5
- mongoose 8→9, sharp 0.33→0.34, typescript 5→6
- lucide-svelte → @lucide/svelte 1.7 (Svelte 5 native package)
- vite 7→8 with rolldown (build time 33s→14s)
- Removed terser (esbuild/oxc default minifier is 20-100x faster)

Infrastructure:
- Removed Redis/ioredis cache layer — MongoDB handles caching natively
- Deleted src/lib/server/cache.ts and all cache.get/set/invalidate usage
- Removed redis-cli from deploy workflow, Redis env vars from .env.example

Mongoose 9 migration:
- Replaced deprecated `new: true` with `returnDocument: 'after'` (16 files)
- Fixed strict query filter types for ObjectId/paymentId fields
- Fixed season param type (string→number) in recipe API
- Removed unused @ts-expect-error in WorkoutSession model

src/lib/components/ThemeToggle.svelte

@@ -1,6 +1,6 @@
 <script>
 	import { themeStore } from '$lib/stores/theme.svelte';
-	import { Sun, Moon, SunMoon } from 'lucide-svelte';
+	import { Sun, Moon, SunMoon } from '@lucide/svelte';
 </script>
 
 <style>

src/lib/components/Toast.svelte

@@ -1,5 +1,5 @@
 <script>
-	import { X } from 'lucide-svelte';
+	import { X } from '@lucide/svelte';
 	import { getToasts } from '$lib/js/toast.svelte';
 
 	const toasts = getToasts();

src/lib/components/faith/AngelusStreakCounter.svelte

@@ -2,7 +2,7 @@
 import { browser } from '$app/environment';
 import { getAngelusStreak, getCurrentTimeSlot, type TimeSlot } from '$lib/stores/angelusStreak.svelte';
 import StreakAura from '$lib/components/faith/StreakAura.svelte';
-import { Coffee, Sun, Moon } from 'lucide-svelte';
+import { Coffee, Sun, Moon } from '@lucide/svelte';
 import { tick, onMount } from 'svelte';
 
 let burst = $state(false);

src/lib/components/fitness/ExercisePicker.svelte

@@ -1,6 +1,6 @@
 <script>
 	import { getFilterOptions, searchExercises, translateTerm } from '$lib/data/exercises';
-	import { Search, X } from 'lucide-svelte';
+	import { Search, X } from '@lucide/svelte';
 	import { page } from '$app/stores';
 	import { detectFitnessLang, t } from '$lib/js/fitnessI18n';
 

src/lib/components/fitness/FoodSearch.svelte

@@ -1,7 +1,7 @@
 <script>
 	import { page } from '$app/stores';
 	import { browser } from '$app/environment';
-	import { Heart, ExternalLink, ScanBarcode, X } from 'lucide-svelte';
+	import { Heart, ExternalLink, ScanBarcode, X } from '@lucide/svelte';
 	import { detectFitnessLang, fitnessSlugs, t } from '$lib/js/fitnessI18n';
 
 	/**

src/lib/components/fitness/SessionCard.svelte

@@ -1,7 +1,7 @@
 <script>
 	import { page } from '$app/stores';
 	import { getExerciseById, getExerciseMetrics } from '$lib/data/exercises';
-	import { Clock, Weight, Trophy, Route, Gauge, Flame } from 'lucide-svelte';
+	import { Clock, Weight, Trophy, Route, Gauge, Flame } from '@lucide/svelte';
 	import { detectFitnessLang, fitnessSlugs } from '$lib/js/fitnessI18n';
 
 	const lang = $derived(detectFitnessLang($page.url.pathname));

src/lib/components/fitness/SetTable.svelte

@@ -1,5 +1,5 @@
 <script>
-	import { Check, X } from 'lucide-svelte';
+	import { Check, X } from '@lucide/svelte';
 	import { METRIC_LABELS } from '$lib/data/exercises';
 	import RestTimer from './RestTimer.svelte';
 	import { page } from '$app/stores';

src/lib/components/fitness/SyncIndicator.svelte

@@ -1,5 +1,5 @@
 <script>
-	import { Cloud, CloudOff, RefreshCw, AlertTriangle } from 'lucide-svelte';
+	import { Cloud, CloudOff, RefreshCw, AlertTriangle } from '@lucide/svelte';
 
 	/** @type {{ status: string }} */
 	let { status } = $props();

src/lib/components/fitness/TemplateCard.svelte

@@ -1,6 +1,6 @@
 <script>
 	import { getExerciseById } from '$lib/data/exercises';
-	import { EllipsisVertical, MapPin } from 'lucide-svelte';
+	import { EllipsisVertical, MapPin } from '@lucide/svelte';
 	import { page } from '$app/stores';
 	import { detectFitnessLang, t } from '$lib/js/fitnessI18n';
 

src/lib/components/fitness/WorkoutFab.svelte

@@ -1,6 +1,6 @@
 <script>
 import { goto } from '$app/navigation';
-import { Play, Pause } from 'lucide-svelte';
+import { Play, Pause } from '@lucide/svelte';
 import SyncIndicator from '$lib/components/fitness/SyncIndicator.svelte';
 import { page } from '$app/stores';
 import { detectFitnessLang, t } from '$lib/js/fitnessI18n';

src/lib/components/recipes/AddToFoodLogButton.svelte

@@ -1,5 +1,5 @@
 <script>
-	import { UtensilsCrossed, X } from 'lucide-svelte';
+	import { UtensilsCrossed, X } from '@lucide/svelte';
 	import { toast } from '$lib/js/toast.svelte';
 
 	let {

src/lib/components/tasks/StickerCalendar.svelte

@@ -1,5 +1,5 @@
 <script>
-  import { ChevronLeft, ChevronRight } from 'lucide-svelte';
+  import { ChevronLeft, ChevronRight } from '@lucide/svelte';
   import { getStickerById } from '$lib/utils/stickers';
   import {
     startOfMonth, endOfMonth, startOfWeek, endOfWeek,

src/lib/components/tasks/TaskForm.svelte

@@ -1,6 +1,6 @@
 <script>
   import { X, Sparkles, Wind, Bath, UtensilsCrossed, CookingPot, WashingMachine,
-    Flower2, Droplets, Leaf, ShoppingCart, Trash2, Shirt, Brush } from 'lucide-svelte';
+    Flower2, Droplets, Leaf, ShoppingCart, Trash2, Shirt, Brush } from '@lucide/svelte';
   import ProfilePicture from '$lib/components/cospend/ProfilePicture.svelte';
   import Toggle from '$lib/components/Toggle.svelte';