fix: Handle slug validation errors in Help Center (#11368)

# Pull Request Template

## Description

This PR fixes an issue with slug validation in the Help Center portal
settings. Previously, users were able to create or update slugs with
invalid characters such as spaces, slashes, and special symbols, which
cause help center to crash.

With this update, slug creation and updates are now properly validated.
Only slugs that match the allowed pattern will be accepted. No spaces,
underscores, slashes, or special characters are allowed.

Examples: **user**, **user-guide**

---

Fixes
https://linear.app/chatwoot/issue/CW-4273/add-validation-for-help-centre-slugs

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

### Loom video

https://www.loom.com/share/a2ca5e2104984f28b29539293ffed33a?sid=e5064cb8-6220-4c43-99da-242c25d32027


## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/dashboard/components-next/HelpCenter/Pages/PortalSettingsPage/PortalBaseSettings.vue

@@ -7,8 +7,8 @@ import { useStore, useStoreGetters } from 'dashboard/composables/store';
 import { uploadFile } from 'dashboard/helper/uploadHelper';
 import { checkFileSizeLimit } from 'shared/helpers/FileHelper';
 import { useVuelidate } from '@vuelidate/core';
-import { required, minLength } from '@vuelidate/validators';
-import { shouldBeUrl } from 'shared/helpers/Validators';
+import { required, minLength, helpers } from '@vuelidate/validators';
+import { shouldBeUrl, isValidSlug } from 'shared/helpers/Validators';
 
 import Button from 'dashboard/components-next/button/Button.vue';
 import Input from 'dashboard/components-next/input/Input.vue';
@@ -61,7 +61,16 @@ const liveChatWidgets = computed(() => {
 
 const rules = {
   name: { required, minLength: minLength(2) },
-  slug: { required },
+  slug: {
+    required: helpers.withMessage(
+      () => t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.ERROR'),
+      required
+    ),
+    isValidSlug: helpers.withMessage(
+      () => t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.FORMAT_ERROR'),
+      isValidSlug
+    ),
+  },
   homePageLink: { shouldBeUrl },
 };
 
@@ -71,9 +80,9 @@ const nameError = computed(() =>
   v$.value.name.$error ? t('HELP_CENTER.CREATE_PORTAL_DIALOG.NAME.ERROR') : ''
 );
 
-const slugError = computed(() =>
-  v$.value.slug.$error ? t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.ERROR') : ''
-);
+const slugError = computed(() => {
+  return v$.value.slug.$errors[0]?.$message || '';
+});
 
 const homePageLinkError = computed(() =>
   v$.value.homePageLink.$error

app/javascript/dashboard/components-next/HelpCenter/PortalSwitcher/CreatePortalDialog.vue

@@ -6,8 +6,9 @@ import { useAlert, useTrack } from 'dashboard/composables';
 import { PORTALS_EVENTS } from 'dashboard/helper/AnalyticsHelper/events';
 import { convertToCategorySlug } from 'dashboard/helper/commons.js';
 import { useVuelidate } from '@vuelidate/core';
-import { required, minLength } from '@vuelidate/validators';
+import { required, minLength, helpers } from '@vuelidate/validators';
 import { buildPortalURL } from 'dashboard/helper/portalHelper';
+import { isValidSlug } from 'shared/helpers/Validators';
 
 import Dialog from 'dashboard/components-next/dialog/Dialog.vue';
 import Input from 'dashboard/components-next/input/Input.vue';
@@ -31,7 +32,16 @@ const state = reactive({
 
 const rules = {
   name: { required, minLength: minLength(2) },
-  slug: { required },
+  slug: {
+    required: helpers.withMessage(
+      () => t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.ERROR'),
+      required
+    ),
+    isValidSlug: helpers.withMessage(
+      () => t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.FORMAT_ERROR'),
+      isValidSlug
+    ),
+  },
 };
 
 const v$ = useVuelidate(rules, state);
@@ -40,9 +50,9 @@ const nameError = computed(() =>
   v$.value.name.$error ? t('HELP_CENTER.CREATE_PORTAL_DIALOG.NAME.ERROR') : ''
 );
 
-const slugError = computed(() =>
-  v$.value.slug.$error ? t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.ERROR') : ''
-);
+const slugError = computed(() => {
+  return v$.value.slug.$errors[0]?.$message || '';
+});
 
 const isSubmitDisabled = computed(() => v$.value.$invalid);
 
@@ -131,6 +141,7 @@ defineExpose({ dialogRef });
         :message="
           nameError || t('HELP_CENTER.CREATE_PORTAL_DIALOG.NAME.MESSAGE')
         "
+        @blur="v$.name.$touch()"
       />
       <Input
         id="portal-slug"
@@ -140,6 +151,8 @@ defineExpose({ dialogRef });
         :label="t('HELP_CENTER.CREATE_PORTAL_DIALOG.SLUG.LABEL')"
         :message-type="slugError ? 'error' : 'info'"
         :message="slugError || buildPortalURL(state.slug)"
+        @input="v$.slug.$touch()"
+        @blur="v$.slug.$touch()"
       />
     </div>
   </Dialog>