added toast and modal confirmation

AGENTS.md

@@ -33,21 +33,33 @@ It describes what the project is, what is already implemented, and what still ne
   - Top bar/title: `frontend/src/components/navigation/AppTopbar.vue`.
   - Pages: `TodayView`, `MealsView`, `MealDetailView`, `IngredientsView`, `StatsView`, `SettingsView`.
   - Route guard is active for `/app/*` (requires token), guest-only for `/`.
+- Frontend UX layer is implemented:
+  - global toasts: `frontend/src/components/common/ToastHost.vue`
+  - global confirm modal: `frontend/src/components/common/ConfirmModalHost.vue`
+  - state management: `frontend/src/stores/ui.ts`
+  - mounted globally in `frontend/src/App.vue`
+  - card-level loading/error states are wired in `TodayView`, `MealsView`, `MealDetailView`, `IngredientsView`
 - Frontend i18n is wired and used across new UI:
   - setup in `frontend/src/i18n/index.ts`
   - locale files in `frontend/src/locales/{sk,cs,en,es,de}.json`
   - language switcher updates locale dynamically.
-  - new app UI keys are added (`nav`, `pageTitles`, `mealTypes`, `common`, `nutrition`, `today`, `meals`, `ingredients`, `stats`, `settings`).
+  - app UI keys include (`nav`, `pageTitles`, `mealTypes`, `common`, `nutrition`, `today`, `meals`, `ingredients`, `stats`, `settings`, `ux`)
 - Frontend theme system is implemented:
-  - light/dark mode toggle in auth page
+  - centralized theme store: `frontend/src/stores/theme.ts`
+  - shared toggle component: `frontend/src/components/common/ThemeToggle.vue`
+  - toggle available in auth, app topbar, and settings
   - design tokens in `frontend/src/assets/css/style.css` (`:root` variables).
 - App logo is served from `frontend/public/Nutrio.png` (copied from `doc/Nutrio.png`).
 - Font Awesome is installed and registered globally in `frontend/src/main.ts`.
 - Pinia is installed and configured in `frontend/src/main.ts` via `frontend/src/stores/index.ts`.
 - Frontend domain/store structure exists:
   - `frontend/src/types/domain.ts`
-  - `frontend/src/stores/{auth,ingredients,meals,diary}.ts`
+  - `frontend/src/stores/{auth,theme,ui,ingredients,meals,diary}.ts`
-  - `frontend/src/utils/{nutrition,api,date}.ts`
+  - `frontend/src/utils/{nutrition,api,date,error}.ts`
+- Ingredients form UX detail:
+  - create/edit form in `IngredientsView` is hidden by default
+  - shows only after `Nová surovina` or `Upraviť`
+  - hides again after successful save (form remount resets fields)
 - `frontend/src/BackendAPI.ts` is generated via `backend/scripts/buildTypeScript.php` and should not be edited manually.
 - `backend/data.json` contains sample meal data (not currently wired into DB/API flow).
 
@@ -181,7 +193,7 @@ Frontend:
 ## Product Behavior Target (what to build next)
 
 - Harden auth (token transport/header strategy, token revoke strategy, brute-force/rate-limits).
-- Polish authenticated frontend UX (validation messages, delete confirmations, optimistic updates, better loading/error states).
+- Polish authenticated frontend UX further (more granular field validation, retry actions, richer empty states).
 - Add diary range screen/workflow on frontend (backend endpoint already exists).
 - Add i18n coverage for any future UI additions and keep keys stable.
 - Add API tests for validation, ownership checks, and totals calculation consistency.

doc/prompt.txt

@@ -41,5 +41,8 @@ Výstup: konkrétny návrh + ukážky kódu, nie všeobecné rady.
 ----- 2026-02-14 07:16:25 -----------------------------------------------------
 dopln kluce pre UI texty pre preklad, pre kluce pouzivaj anglictinu, dopln potom aj vsetky preklady vo frontend/src/locales/*.json
 
------ 2026-02-14 07:33:30 -----------------------------------------------------
+----- 2026-02-14 08:05:38 -----------------------------------------------------
-doplniť jemnejší UX flow (toasty, confirm modaly pri delete, loading/error states per card)
+na zobrazeni app/ingredients sprav aby formular pre pridanie novej suroviny sa zobrazil az ked kliknem na tlacitko Nova surovina, a po uspesnom ulozeni ten formular pre pridanie novej suroviny skry, nezabudni vynulovat udaje vo formulari po ulozeni
+
+----- 2026-02-14 08:08:33 -----------------------------------------------------
+dopln jemnejší UX flow (toasty, confirm modaly pri delete, loading/error states per card)

frontend/src/App.vue

@@ -1,7 +1,11 @@
 <script setup lang="ts">
 import { RouterView } from 'vue-router'
+import ToastHost from '@/components/common/ToastHost.vue'
+import ConfirmModalHost from '@/components/common/ConfirmModalHost.vue'
 </script>
 
 <template>
 	<RouterView />
+	<ToastHost />
+	<ConfirmModalHost />
 </template>

frontend/src/assets/css/style.css

@@ -633,6 +633,98 @@ select {
   font-size: var(--fs-sm);
 }
 
+.card-state {
+  margin: 0;
+  color: var(--color-muted);
+}
+
+.card-state--error {
+  color: var(--color-error);
+  background: var(--color-error-bg);
+  border-radius: var(--radius-md);
+  padding: 0.65rem 0.75rem;
+}
+
+.toast-host {
+  position: fixed;
+  right: var(--space-md);
+  bottom: var(--space-md);
+  z-index: 40;
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-xs);
+  pointer-events: none;
+}
+
+.toast-item {
+  min-width: min(360px, calc(100vw - 2rem));
+  max-width: min(460px, calc(100vw - 2rem));
+  border: 1px solid var(--color-border);
+  background: var(--color-surface);
+  box-shadow: var(--shadow-soft);
+  border-radius: var(--radius-md);
+  padding: 0.65rem 0.75rem;
+  display: flex;
+  align-items: start;
+  justify-content: space-between;
+  gap: var(--space-sm);
+  pointer-events: auto;
+}
+
+.toast-item--success {
+  border-color: color-mix(in srgb, var(--color-green) 50%, var(--color-border));
+}
+
+.toast-item--error {
+  border-color: color-mix(in srgb, var(--color-error) 50%, var(--color-border));
+  background: color-mix(in srgb, var(--color-error-bg) 50%, var(--color-surface));
+}
+
+.toast-item--info {
+  border-color: color-mix(in srgb, var(--color-gray) 40%, var(--color-border));
+}
+
+.toast-item__close {
+  border: none;
+  background: transparent;
+  color: var(--color-muted);
+  cursor: pointer;
+  line-height: 1;
+  padding: 0;
+}
+
+.confirm-backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.42);
+  backdrop-filter: blur(2px);
+  z-index: 50;
+  display: grid;
+  place-items: center;
+  padding: var(--space-md);
+}
+
+.confirm-modal {
+  width: min(520px, 100%);
+}
+
+.confirm-modal h3 {
+  margin-top: 0;
+  margin-bottom: var(--space-sm);
+}
+
+.confirm-modal p {
+  margin-top: 0;
+  margin-bottom: var(--space-md);
+  color: var(--color-muted);
+}
+
+.confirm-modal__actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: var(--space-sm);
+}
+
 .app-bottom-tabs {
   display: none;
 }
@@ -699,4 +791,15 @@ select {
   .app-topbar__actions {
     gap: var(--space-xs);
   }
+
+  .toast-host {
+    left: var(--space-sm);
+    right: var(--space-sm);
+    bottom: calc(62px + var(--space-sm));
+  }
+
+  .toast-item {
+    min-width: auto;
+    max-width: 100%;
+  }
 }

frontend/src/components/common/ConfirmModalHost.vue

@@ -0,0 +1,27 @@
+<script setup lang="ts">
+import { useUIStore } from '@/stores/ui'
+
+const ui = useUIStore()
+</script>
+
+<template>
+	<div
+		v-if="ui.confirmState.open"
+		class="confirm-backdrop"
+		role="dialog"
+		aria-modal="true"
+	>
+		<div class="confirm-modal card">
+			<h3>{{ ui.confirmState.title }}</h3>
+			<p>{{ ui.confirmState.message }}</p>
+			<div class="confirm-modal__actions">
+				<button type="button" class="btn" @click="ui.resolveConfirm(false)">
+					{{ ui.confirmState.cancelLabel }}
+				</button>
+				<button type="button" class="btn btn-danger" @click="ui.resolveConfirm(true)">
+					{{ ui.confirmState.confirmLabel }}
+				</button>
+			</div>
+		</div>
+	</div>
+</template>

frontend/src/components/common/ToastHost.vue

@@ -0,0 +1,28 @@
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n'
+import { useUIStore } from '@/stores/ui'
+
+const ui = useUIStore()
+const { t } = useI18n()
+</script>
+
+<template>
+	<div class="toast-host" aria-live="polite" aria-atomic="true">
+		<div
+			v-for="toast in ui.toasts"
+			:key="toast.id"
+			class="toast-item"
+			:class="`toast-item--${toast.type}`"
+		>
+			<span>{{ toast.message }}</span>
+			<button
+				type="button"
+				class="toast-item__close"
+				@click="ui.removeToast(toast.id)"
+				:aria-label="t('common.close')"
+			>
+				×
+			</button>
+		</div>
+	</div>
+</template>

frontend/src/locales/cs.json

@@ -71,10 +71,40 @@
 		"create": "Vytvořit",
 		"edit": "Upravit",
 		"delete": "Smazat",
+		"close": "Zavřít",
 		"actions": "Akce",
 		"loading": "Načítám...",
 		"kcalUnit": "kcal"
 	},
+	"ux": {
+		"toast": {
+			"created": "Položka byla vytvořena.",
+			"saved": "Změny byly uloženy.",
+			"updated": "Změny byly aplikovány.",
+			"deleted": "Položka byla smazána."
+		},
+		"errors": {
+			"loadDay": "Nepodařilo se načíst den.",
+			"updateDay": "Nepodařilo se upravit denní jídla.",
+			"loadMeals": "Nepodařilo se načíst jídelníčky.",
+			"createMeal": "Nepodařilo se vytvořit jídelníček.",
+			"loadMeal": "Nepodařilo se načíst jídelníček.",
+			"saveMeal": "Nepodařilo se uložit jídelníček.",
+			"deleteMeal": "Nepodařilo se smazat jídelníček.",
+			"addMealItem": "Nepodařilo se přidat položku jídelníčku.",
+			"updateMealItem": "Nepodařilo se upravit položku jídelníčku.",
+			"deleteMealItem": "Nepodařilo se smazat položku jídelníčku.",
+			"loadIngredients": "Nepodařilo se načíst suroviny.",
+			"saveIngredient": "Nepodařilo se uložit surovinu.",
+			"deleteIngredient": "Nepodařilo se smazat surovinu."
+		},
+		"confirm": {
+			"deleteTitle": "Potvrď smazání",
+			"deleteMeal": "Opravdu chceš smazat tento jídelníček?",
+			"deleteMealItem": "Opravdu chceš smazat tuto položku jídelníčku?",
+			"deleteIngredient": "Opravdu chceš smazat tuto surovinu?"
+		}
+	},
 	"nutrition": {
 		"short": {
 			"protein": "B",

frontend/src/locales/de.json

@@ -71,10 +71,40 @@
 		"create": "Erstellen",
 		"edit": "Bearbeiten",
 		"delete": "Löschen",
+		"close": "Schließen",
 		"actions": "Aktion",
 		"loading": "Lädt...",
 		"kcalUnit": "kcal"
 	},
+	"ux": {
+		"toast": {
+			"created": "Element wurde erstellt.",
+			"saved": "Änderungen wurden gespeichert.",
+			"updated": "Änderungen wurden übernommen.",
+			"deleted": "Element wurde gelöscht."
+		},
+		"errors": {
+			"loadDay": "Tag konnte nicht geladen werden.",
+			"updateDay": "Tagesmahlzeiten konnten nicht aktualisiert werden.",
+			"loadMeals": "Mahlzeiten konnten nicht geladen werden.",
+			"createMeal": "Mahlzeitenplan konnte nicht erstellt werden.",
+			"loadMeal": "Mahlzeitenplan konnte nicht geladen werden.",
+			"saveMeal": "Mahlzeitenplan konnte nicht gespeichert werden.",
+			"deleteMeal": "Mahlzeitenplan konnte nicht gelöscht werden.",
+			"addMealItem": "Mahlzeiten-Element konnte nicht hinzugefügt werden.",
+			"updateMealItem": "Mahlzeiten-Element konnte nicht aktualisiert werden.",
+			"deleteMealItem": "Mahlzeiten-Element konnte nicht gelöscht werden.",
+			"loadIngredients": "Zutaten konnten nicht geladen werden.",
+			"saveIngredient": "Zutat konnte nicht gespeichert werden.",
+			"deleteIngredient": "Zutat konnte nicht gelöscht werden."
+		},
+		"confirm": {
+			"deleteTitle": "Löschen bestätigen",
+			"deleteMeal": "Möchtest du diesen Mahlzeitenplan wirklich löschen?",
+			"deleteMealItem": "Möchtest du dieses Mahlzeiten-Element wirklich löschen?",
+			"deleteIngredient": "Möchtest du diese Zutat wirklich löschen?"
+		}
+	},
 	"nutrition": {
 		"short": {
 			"protein": "E",

frontend/src/locales/en.json

@@ -71,10 +71,40 @@
 		"create": "Create",
 		"edit": "Edit",
 		"delete": "Delete",
+		"close": "Close",
 		"actions": "Action",
 		"loading": "Loading...",
 		"kcalUnit": "kcal"
 	},
+	"ux": {
+		"toast": {
+			"created": "Item was created.",
+			"saved": "Changes were saved.",
+			"updated": "Changes were applied.",
+			"deleted": "Item was deleted."
+		},
+		"errors": {
+			"loadDay": "Failed to load the day.",
+			"updateDay": "Failed to update day meals.",
+			"loadMeals": "Failed to load meals.",
+			"createMeal": "Failed to create meal plan.",
+			"loadMeal": "Failed to load meal plan.",
+			"saveMeal": "Failed to save meal plan.",
+			"deleteMeal": "Failed to delete meal plan.",
+			"addMealItem": "Failed to add meal item.",
+			"updateMealItem": "Failed to update meal item.",
+			"deleteMealItem": "Failed to delete meal item.",
+			"loadIngredients": "Failed to load ingredients.",
+			"saveIngredient": "Failed to save ingredient.",
+			"deleteIngredient": "Failed to delete ingredient."
+		},
+		"confirm": {
+			"deleteTitle": "Confirm delete",
+			"deleteMeal": "Do you really want to delete this meal plan?",
+			"deleteMealItem": "Do you really want to delete this meal item?",
+			"deleteIngredient": "Do you really want to delete this ingredient?"
+		}
+	},
 	"nutrition": {
 		"short": {
 			"protein": "P",

frontend/src/locales/es.json

@@ -71,10 +71,40 @@
 		"create": "Crear",
 		"edit": "Editar",
 		"delete": "Eliminar",
+		"close": "Cerrar",
 		"actions": "Acción",
 		"loading": "Cargando...",
 		"kcalUnit": "kcal"
 	},
+	"ux": {
+		"toast": {
+			"created": "Elemento creado.",
+			"saved": "Cambios guardados.",
+			"updated": "Cambios aplicados.",
+			"deleted": "Elemento eliminado."
+		},
+		"errors": {
+			"loadDay": "No se pudo cargar el día.",
+			"updateDay": "No se pudieron actualizar las comidas del día.",
+			"loadMeals": "No se pudieron cargar los menús.",
+			"createMeal": "No se pudo crear el menú.",
+			"loadMeal": "No se pudo cargar el menú.",
+			"saveMeal": "No se pudo guardar el menú.",
+			"deleteMeal": "No se pudo eliminar el menú.",
+			"addMealItem": "No se pudo añadir el elemento del menú.",
+			"updateMealItem": "No se pudo actualizar el elemento del menú.",
+			"deleteMealItem": "No se pudo eliminar el elemento del menú.",
+			"loadIngredients": "No se pudieron cargar los ingredientes.",
+			"saveIngredient": "No se pudo guardar el ingrediente.",
+			"deleteIngredient": "No se pudo eliminar el ingrediente."
+		},
+		"confirm": {
+			"deleteTitle": "Confirmar eliminación",
+			"deleteMeal": "¿De verdad quieres eliminar este menú?",
+			"deleteMealItem": "¿De verdad quieres eliminar este elemento del menú?",
+			"deleteIngredient": "¿De verdad quieres eliminar este ingrediente?"
+		}
+	},
 	"nutrition": {
 		"short": {
 			"protein": "P",

frontend/src/locales/sk.json

@@ -71,10 +71,40 @@
 		"create": "Vytvoriť",
 		"edit": "Upraviť",
 		"delete": "Zmazať",
+		"close": "Zavrieť",
 		"actions": "Akcia",
 		"loading": "Načítavam...",
 		"kcalUnit": "kcal"
 	},
+	"ux": {
+		"toast": {
+			"created": "Položka bola vytvorená.",
+			"saved": "Zmeny boli uložené.",
+			"updated": "Zmeny boli aplikované.",
+			"deleted": "Položka bola zmazaná."
+		},
+		"errors": {
+			"loadDay": "Nepodarilo sa načítať deň.",
+			"updateDay": "Nepodarilo sa upraviť denné jedlá.",
+			"loadMeals": "Nepodarilo sa načítať jedálničky.",
+			"createMeal": "Nepodarilo sa vytvoriť jedálniček.",
+			"loadMeal": "Nepodarilo sa načítať jedálniček.",
+			"saveMeal": "Nepodarilo sa uložiť jedálniček.",
+			"deleteMeal": "Nepodarilo sa zmazať jedálniček.",
+			"addMealItem": "Nepodarilo sa pridať položku jedálnička.",
+			"updateMealItem": "Nepodarilo sa upraviť položku jedálnička.",
+			"deleteMealItem": "Nepodarilo sa zmazať položku jedálnička.",
+			"loadIngredients": "Nepodarilo sa načítať suroviny.",
+			"saveIngredient": "Nepodarilo sa uložiť surovinu.",
+			"deleteIngredient": "Nepodarilo sa zmazať surovinu."
+		},
+		"confirm": {
+			"deleteTitle": "Potvrď zmazanie",
+			"deleteMeal": "Naozaj chceš zmazať tento jedálniček?",
+			"deleteMealItem": "Naozaj chceš zmazať túto položku jedálnička?",
+			"deleteIngredient": "Naozaj chceš zmazať túto surovinu?"
+		}
+	},
 	"nutrition": {
 		"short": {
 			"protein": "B",

frontend/src/stores/ui.ts

@@ -0,0 +1,84 @@
+import { ref } from 'vue'
+import { defineStore } from 'pinia'
+
+export type ToastType = 'success' | 'error' | 'info'
+
+export type ToastItem = {
+	id: number
+	type: ToastType
+	message: string
+}
+
+export type ConfirmOptions = {
+	title: string
+	message: string
+	confirmLabel: string
+	cancelLabel: string
+}
+
+type ConfirmState = ConfirmOptions & {
+	open: boolean
+}
+
+let toastId = 0
+let confirmResolver: ((value: boolean) => void) | null = null
+
+export const useUIStore = defineStore('ui', () => {
+	const toasts = ref<ToastItem[]>([])
+
+	const confirmState = ref<ConfirmState>({
+		open: false,
+		title: '',
+		message: '',
+		confirmLabel: '',
+		cancelLabel: '',
+	})
+
+	const removeToast = (id: number) => {
+		toasts.value = toasts.value.filter((item) => item.id !== id)
+	}
+
+	const pushToast = (type: ToastType, message: string, timeoutMs = 3200) => {
+		const id = ++toastId
+		toasts.value = [...toasts.value, { id, type, message }]
+		setTimeout(() => removeToast(id), timeoutMs)
+	}
+
+	const success = (message: string) => pushToast('success', message)
+	const error = (message: string) => pushToast('error', message)
+	const info = (message: string) => pushToast('info', message)
+
+	const confirm = (options: ConfirmOptions): Promise<boolean> => {
+		if (confirmResolver) {
+			confirmResolver(false)
+		}
+
+		confirmState.value = {
+			open: true,
+			...options,
+		}
+
+		return new Promise<boolean>((resolve) => {
+			confirmResolver = resolve
+		})
+	}
+
+	const resolveConfirm = (value: boolean) => {
+		confirmState.value.open = false
+		if (confirmResolver) {
+			confirmResolver(value)
+			confirmResolver = null
+		}
+	}
+
+	return {
+		toasts,
+		confirmState,
+		removeToast,
+		success,
+		error,
+		info,
+		confirm,
+		resolveConfirm,
+	}
+})

frontend/src/utils/error.ts

@@ -0,0 +1,11 @@
+export const toErrorMessage = (error: unknown, fallback: string): string => {
+	if (typeof error === 'string' && error.length > 0) {
+		return error
+	}
+
+	if (error instanceof Error && typeof error.message === 'string' && error.message.length > 0) {
+		return error.message
+	}
+
+	return fallback
+}

frontend/src/views/IngredientsView.vue

@@ -3,17 +3,29 @@ import { computed, onMounted, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 import IngredientForm from '@/components/ingredients/IngredientForm.vue'
 import { useIngredientsStore } from '@/stores/ingredients'
+import { useUIStore } from '@/stores/ui'
 import type { Ingredient } from '@/types/domain'
+import { toErrorMessage } from '@/utils/error'
 
 const ingredientsStore = useIngredientsStore()
+const ui = useUIStore()
 const editingId = ref<number | null>(null)
 const saving = ref(false)
+const formMode = ref<'hidden' | 'create' | 'edit'>('hidden')
+const loadError = ref('')
+const actionError = ref('')
 const { t } = useI18n()
 
 onMounted(async () => {
+	try {
+		loadError.value = ''
 		if (ingredientsStore.items.length <= 0) {
 			await ingredientsStore.loadIngredients()
 		}
+	} catch (error) {
+		loadError.value = toErrorMessage(error, t('ux.errors.loadIngredients'))
+		ui.error(loadError.value)
+	}
 })
 
 const editingIngredient = computed<Ingredient | null>(() => {
@@ -24,15 +36,21 @@ const editingIngredient = computed<Ingredient | null>(() => {
 })
 
 const startCreate = () => {
+	actionError.value = ''
 	editingId.value = null
+	formMode.value = 'create'
 }
 
 const startEdit = (ingredientId: number) => {
+	actionError.value = ''
 	editingId.value = ingredientId
+	formMode.value = 'edit'
 }
 
 const cancelEdit = () => {
 	editingId.value = null
+	formMode.value = 'hidden'
+	actionError.value = ''
 }
 
 const saveIngredient = async (payload: {
@@ -45,22 +63,48 @@ const saveIngredient = async (payload: {
 	kcal_100: number
 }) => {
 	saving.value = true
+	actionError.value = ''
 	try {
 		if (editingIngredient.value) {
 			await ingredientsStore.updateIngredient(editingIngredient.value.ingredient_id, payload)
+			ui.success(t('ux.toast.saved'))
 		} else {
 			await ingredientsStore.createIngredient(payload)
+			ui.success(t('ux.toast.created'))
 		}
 		editingId.value = null
+		formMode.value = 'hidden'
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.saveIngredient'))
+		ui.error(actionError.value)
 	} finally {
 		saving.value = false
 	}
 }
 
 const removeIngredient = async (ingredientId: number) => {
+	const confirmed = await ui.confirm({
+		title: t('ux.confirm.deleteTitle'),
+		message: t('ux.confirm.deleteIngredient'),
+		confirmLabel: t('common.delete'),
+		cancelLabel: t('common.cancel'),
+	})
+
+	if (!confirmed) {
+		return
+	}
+
+	actionError.value = ''
+	try {
 		await ingredientsStore.deleteIngredient(ingredientId)
+		ui.success(t('ux.toast.deleted'))
 		if (editingId.value === ingredientId) {
 			editingId.value = null
+			formMode.value = 'hidden'
+		}
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.deleteIngredient'))
+		ui.error(actionError.value)
 	}
 }
 </script>
@@ -68,6 +112,7 @@ const removeIngredient = async (ingredientId: number) => {
 <template>
 	<section class="page">
 		<IngredientForm
+			v-if="formMode !== 'hidden'"
 			:initial="editingIngredient"
 			:submit-label="saving ? t('common.saving') : t('common.save')"
 			@save="saveIngredient"
@@ -79,7 +124,11 @@ const removeIngredient = async (ingredientId: number) => {
 				<h3>{{ t('ingredients.databaseTitle') }}</h3>
 				<button class="btn" type="button" @click="startCreate">{{ t('ingredients.newButton') }}</button>
 			</div>
-			<div class="list" v-if="ingredientsStore.sortedItems.length > 0">
+
+			<p v-if="loadError" class="card-state card-state--error">{{ loadError }}</p>
+			<p v-else-if="ingredientsStore.loading" class="card-state">{{ t('common.loading') }}</p>
+			<p v-else-if="actionError" class="card-state card-state--error">{{ actionError }}</p>
+			<div class="list" v-else-if="ingredientsStore.sortedItems.length > 0">
 				<div class="list-row" v-for="ingredient in ingredientsStore.sortedItems" :key="ingredient.ingredient_id">
 					<div>
 						<strong>{{ ingredient.name }}</strong>

frontend/src/views/MealDetailView.vue

@@ -5,18 +5,23 @@ import { useI18n } from 'vue-i18n'
 import MealItemsEditor from '@/components/meals/MealItemsEditor.vue'
 import { useIngredientsStore } from '@/stores/ingredients'
 import { useMealsStore } from '@/stores/meals'
+import { useUIStore } from '@/stores/ui'
 import type { MealType } from '@/types/domain'
+import { toErrorMessage } from '@/utils/error'
 
 const route = useRoute()
 const router = useRouter()
 const mealsStore = useMealsStore()
 const ingredientsStore = useIngredientsStore()
+const ui = useUIStore()
 const { t } = useI18n()
 
 const loading = ref(false)
 const saving = ref(false)
 const mealName = ref('')
 const mealType = ref<MealType>('breakfast')
+const loadError = ref('')
+const actionError = ref('')
 
 const mealId = computed(() => Number(route.params.mealId))
 
@@ -43,11 +48,15 @@ const loadData = async () => {
 		return
 	}
 	loading.value = true
+	loadError.value = ''
 	try {
 		if (ingredientsStore.items.length <= 0) {
 			await ingredientsStore.loadIngredients()
 		}
 		await mealsStore.loadMeal(mealId.value)
+	} catch (error) {
+		loadError.value = toErrorMessage(error, t('ux.errors.loadMeal'))
+		ui.error(loadError.value)
 	} finally {
 		loading.value = false
 	}
@@ -60,12 +69,17 @@ const saveMeal = async () => {
 	if (!meal.value) {
 		return
 	}
+	actionError.value = ''
 	saving.value = true
 	try {
 		await mealsStore.updateMeal(meal.value.meal_id, {
 			name: mealName.value,
 			meal_type: mealType.value,
 		})
+		ui.success(t('ux.toast.saved'))
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.saveMeal'))
+		ui.error(actionError.value)
 	} finally {
 		saving.value = false
 	}
@@ -75,18 +89,44 @@ const removeMeal = async () => {
 	if (!meal.value) {
 		return
 	}
+
+	const confirmed = await ui.confirm({
+		title: t('ux.confirm.deleteTitle'),
+		message: t('ux.confirm.deleteMeal'),
+		confirmLabel: t('common.delete'),
+		cancelLabel: t('common.cancel'),
+	})
+
+	if (!confirmed) {
+		return
+	}
+
+	actionError.value = ''
+	try {
 		await mealsStore.deleteMeal(meal.value.meal_id)
+		ui.success(t('ux.toast.deleted'))
 		await router.replace({ name: 'meals' })
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.deleteMeal'))
+		ui.error(actionError.value)
+	}
 }
 
 const addItem = async (payload: { ingredient_id: number; grams: number }) => {
 	if (!meal.value) {
 		return
 	}
+	actionError.value = ''
+	try {
 		await mealsStore.addMealItem(meal.value.meal_id, {
 			...payload,
 			position: (meal.value.items?.length ?? 0) + 1,
 		})
+		ui.success(t('ux.toast.created'))
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.addMealItem'))
+		ui.error(actionError.value)
+	}
 }
 
 const updateItem = async (payload: {
@@ -98,6 +138,8 @@ const updateItem = async (payload: {
 	if (!meal.value) {
 		return
 	}
+	actionError.value = ''
+	try {
 		await mealsStore.updateMealItem(
 			payload.meal_item_id,
 			{
@@ -107,19 +149,43 @@ const updateItem = async (payload: {
 			},
 			meal.value.meal_id,
 		)
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.updateMealItem'))
+		ui.error(actionError.value)
+	}
 }
 
 const removeItem = async (mealItemId: number) => {
 	if (!meal.value) {
 		return
 	}
+
+	const confirmed = await ui.confirm({
+		title: t('ux.confirm.deleteTitle'),
+		message: t('ux.confirm.deleteMealItem'),
+		confirmLabel: t('common.delete'),
+		cancelLabel: t('common.cancel'),
+	})
+
+	if (!confirmed) {
+		return
+	}
+
+	actionError.value = ''
+	try {
 		await mealsStore.deleteMealItem(meal.value.meal_id, mealItemId)
+		ui.success(t('ux.toast.deleted'))
+	} catch (error) {
+		actionError.value = toErrorMessage(error, t('ux.errors.deleteMealItem'))
+		ui.error(actionError.value)
+	}
 }
 </script>
 
 <template>
 	<section class="page">
-		<div v-if="loading" class="card">{{ t('meals.loadingMeal') }}</div>
+		<div v-if="loading" class="card card-state">{{ t('meals.loadingMeal') }}</div>
+		<div v-else-if="loadError" class="card card-state card-state--error">{{ loadError }}</div>
 
 		<template v-else-if="meal">
 			<section class="card">
@@ -137,6 +203,7 @@ const removeItem = async (mealItemId: number) => {
 						</select>
 					</label>
 				</div>
+				<p v-if="actionError" class="card-state card-state--error">{{ actionError }}</p>
 				<div class="form-actions">
 					<button class="btn btn-primary" type="button" :disabled="saving" @click="saveMeal">
 						{{ saving ? t('common.saving') : t('meals.saveChanges') }}
@@ -154,6 +221,6 @@ const removeItem = async (mealItemId: number) => {
 			/>
 		</template>
 
-		<div v-else class="card">{{ t('meals.notFound') }}</div>
+		<div v-else class="card card-state card-state--error">{{ t('meals.notFound') }}</div>
 	</section>
 </template>

frontend/src/views/MealsView.vue

@@ -4,21 +4,31 @@ import { useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import MealTypeFilter from '@/components/meals/MealTypeFilter.vue'
 import { useMealsStore } from '@/stores/meals'
+import { useUIStore } from '@/stores/ui'
 import type { MealType } from '@/types/domain'
+import { toErrorMessage } from '@/utils/error'
 
 const router = useRouter()
 const mealsStore = useMealsStore()
+const ui = useUIStore()
 const { t } = useI18n()
 
 const filterType = ref<MealType | ''>('')
 const newMealName = ref('')
 const newMealType = ref<MealType>('breakfast')
 const creating = ref(false)
+const errorMessage = ref('')
 
 onMounted(async () => {
+	try {
+		errorMessage.value = ''
 		if (mealsStore.list.length <= 0) {
 			await mealsStore.loadMeals()
 		}
+	} catch (error) {
+		errorMessage.value = toErrorMessage(error, t('ux.errors.loadMeals'))
+		ui.error(errorMessage.value)
+	}
 })
 
 const filteredMeals = computed(() => {
@@ -33,14 +43,20 @@ const createMeal = async () => {
 	if (name.length <= 0) {
 		return
 	}
+
+	errorMessage.value = ''
 	creating.value = true
 	try {
 		const meal = await mealsStore.createMeal({
 			name,
 			meal_type: newMealType.value,
 		})
+		ui.success(t('ux.toast.created'))
 		newMealName.value = ''
 		await router.push({ name: 'meal-detail', params: { mealId: meal.meal_id } })
+	} catch (error) {
+		errorMessage.value = toErrorMessage(error, t('ux.errors.createMeal'))
+		ui.error(errorMessage.value)
 	} finally {
 		creating.value = false
 	}
@@ -67,7 +83,9 @@ const createMeal = async () => {
 
 		<section class="card">
 			<h3>{{ t('meals.libraryTitle') }}</h3>
-			<div class="list" v-if="filteredMeals.length > 0">
+			<p v-if="errorMessage" class="card-state card-state--error">{{ errorMessage }}</p>
+			<p v-else-if="mealsStore.loading" class="card-state">{{ t('common.loading') }}</p>
+			<div class="list" v-else-if="filteredMeals.length > 0">
 				<RouterLink
 					v-for="meal in filteredMeals"
 					:key="meal.meal_id"

frontend/src/views/TodayView.vue

@@ -6,17 +6,21 @@ import DayMealCard from '@/components/today/DayMealCard.vue'
 import DayTotalsCard from '@/components/today/DayTotalsCard.vue'
 import { useDiaryStore } from '@/stores/diary'
 import { useMealsStore } from '@/stores/meals'
+import { useUIStore } from '@/stores/ui'
 import { MEAL_TYPES, type MealType } from '@/types/domain'
 import { todayISO } from '@/utils/date'
+import { toErrorMessage } from '@/utils/error'
 
 const route = useRoute()
 const router = useRouter()
 const diaryStore = useDiaryStore()
 const mealsStore = useMealsStore()
+const ui = useUIStore()
 const { t } = useI18n()
 
 const isWorking = ref(false)
 const selectedDate = ref(todayISO())
+const errorMessage = ref('')
 
 const resolveDate = (): string => {
 	const dateFromRoute = typeof route.params.date === 'string' ? route.params.date : ''
@@ -28,12 +32,16 @@ const mealTypeLabel = (mealType: MealType): string => t(`mealTypes.${mealType}`)
 const reloadDay = async (date: string) => {
 	selectedDate.value = date
 	diaryStore.ensureCurrentDay(date)
+	errorMessage.value = ''
 	isWorking.value = true
 	try {
 		if (mealsStore.list.length <= 0) {
 			await mealsStore.loadMeals()
 		}
 		await diaryStore.loadDay(date)
+	} catch (error) {
+		errorMessage.value = toErrorMessage(error, t('ux.errors.loadDay'))
+		ui.error(errorMessage.value)
 	} finally {
 		isWorking.value = false
 	}
@@ -55,11 +63,19 @@ const onDateChange = async () => {
 }
 
 const onSelectMeal = async (mealType: MealType, mealId: number | null) => {
+	try {
+		errorMessage.value = ''
 		if (mealId === null) {
 			await diaryStore.unsetMealForType(selectedDate.value, mealType)
+			ui.success(t('ux.toast.updated'))
 			return
 		}
 		await diaryStore.setMealForType(selectedDate.value, mealType, mealId)
+		ui.success(t('ux.toast.updated'))
+	} catch (error) {
+		errorMessage.value = toErrorMessage(error, t('ux.errors.updateDay'))
+		ui.error(errorMessage.value)
+	}
 }
 
 const dayMeals = computed(() => diaryStore.mealsByType)
@@ -75,7 +91,8 @@ const dayTotals = computed(() => diaryStore.computedTotals)
 			</label>
 		</div>
 
-		<div v-if="isWorking || diaryStore.loading" class="card">{{ t('today.loadingDay') }}</div>
+		<div v-if="errorMessage" class="card card-state card-state--error">{{ errorMessage }}</div>
+		<div v-else-if="isWorking || diaryStore.loading" class="card card-state">{{ t('today.loadingDay') }}</div>
 
 		<template v-else>
 			<div class="grid-three">