fix: standardize multiplication notation from '×' to 'x' across various files for consistency

frontend/src/lib/components/dashboard/invoices/edit/items/fa/class-dialog.svelte

@@ -146,7 +146,7 @@
 					class="ml-auto shrink-0 cursor-pointer opacity-60 hover:opacity-100"
 					onclick={() => (classesLoadError = '')}
 					aria-label="Cerrar"
-				>×</button>
+				>x</button>
 			</div>
 		{/if}
 

frontend/src/lib/components/dashboard/invoices/edit/items/fa/part-number-dialog.svelte

@@ -144,7 +144,7 @@
 					class="ml-auto shrink-0 cursor-pointer opacity-60 hover:opacity-100"
 					onclick={() => (partsLoadError = '')}
 					aria-label="Cerrar"
-				>×</button>
+				>x</button>
 			</div>
 		{/if}
 

frontend/src/lib/components/dashboard/invoices/edit/items/fa/tab-series.svelte

@@ -185,7 +185,7 @@
 				class="ml-auto shrink-0 cursor-pointer opacity-60 hover:opacity-100"
 				onclick={() => (seriesErrorMessage = '')}
 				aria-label="Cerrar"
-			>×</button>
+			>x</button>
 		</div>
 	{/if}
 

frontend/src/lib/components/ui/error-panel-notice.svelte

@@ -169,7 +169,7 @@
 										{#if isWarning}
 											<AlertTriangle class="size-3" />
 										{:else}
-											×
+											x
 										{/if}
 									</span>
 								</td>

frontend/src/routes/dashboard/+page.svelte

@@ -144,7 +144,7 @@
 			├───────────────┬────────┴─┬───────────────┤  row 3
 			│ Clientes (4)  │Proveed(4) │ Accesos  (4)  │
 			├────────────────────────┬─────────────────┤  row 4
-			│  ActivityFeed  (8, ×3) │  Documentos (4) │
+			│  ActivityFeed  (8, x3) │  Documentos (4) │
 			│                        ├─────────────────┤  row 5
 			│                        │  Contactos  (4) │
 			│                        ├─────────────────┤  row 6

frontend/src/routes/dashboard/goods/fda-codes/+page.svelte

@@ -402,7 +402,7 @@
 					{#if searchQuery}
 						<Badge variant="secondary" class="gap-2">
 							Filtro: "{searchQuery}"
-							<button onclick={() => (searchQuery = '')} class="hover:text-destructive"> × </button>
+							<button onclick={() => (searchQuery = '')} class="hover:text-destructive"> x </button>
 						</Badge>
 					{/if}
 				</div>