feat: add incus user option

frontend/pages/hosts/components/form.tsx

@@ -172,9 +172,18 @@ const IncusFormFields = ({ form }: MiscFormFieldProps) => {
         />
       </FormField>
       {type === "lxc" && (
-        <FormField label="Shell">
-          <InputField form={form} name="metadata.shell" placeholder="bash" />
-        </FormField>
+        <>
+          <FormField label="User ID">
+            <InputField
+              form={form}
+              keyboardType="number-pad"
+              name="metadata.user"
+            />
+          </FormField>
+          <FormField label="Shell">
+            <InputField form={form} name="metadata.shell" placeholder="bash" />
+          </FormField>
+        </>
       )}
     </>
   );

frontend/pages/hosts/schema/form.ts

@@ -44,6 +44,7 @@ const incusSchema = hostSchema.merge(
     metadata: z.object({
       type: z.enum(["lxc", "qemu"]),
       instance: z.string().min(1, { message: "Instance name is required" }),
+      user: z.coerce.number().nullish(),
       shell: z.string().nullish(),
     }),
   })