fix(sidebar): deduplicate menu items for multi-role users

When a user has both student and missionary roles, common items
(dashboard, education, ticket) appeared twice. Added dedupeKey to
each item; buildMergedMenuItems now skips items whose key was already
added by an earlier role — the primary role's version always wins.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/layouts/roleMenuItems.js

@@ -11,6 +11,7 @@ export const buildStudentMenuItems = (route) => [
     icon: 'monitor',
     to: { name: 'student-dashboard' },
     active: route.name === 'student-dashboard',
+    dedupeKey: 'dashboard',
   },
   {
     title: 'آموزش',
@@ -25,6 +26,7 @@ export const buildStudentMenuItems = (route) => [
       'student-courses',
       'student-course-details',
     ].includes(route.name),
+    dedupeKey: 'education',
   },
   {
     title: 'خدمات',
@@ -55,6 +57,7 @@ export const buildStudentMenuItems = (route) => [
     icon: 'envelope-open',
     to: { name: 'student-tickets' },
     active: route.name === 'student-tickets',
+    dedupeKey: 'ticket',
   },
 ]
 
@@ -64,6 +67,7 @@ export const buildMissionaryMenuItems = (route) => [
     icon: 'menu',
     to: { name: 'missionary-dashboard' },
     active: route.name === 'missionary-dashboard',
+    dedupeKey: 'dashboard',
   },
   {
     title: 'سامانه اعزام',
@@ -76,12 +80,14 @@ export const buildMissionaryMenuItems = (route) => [
     icon: 'graduation-cap',
     to: { name: 'missionary-education' },
     active: route.name?.startsWith('missionary-education'),
+    dedupeKey: 'education',
   },
   {
     title: 'تیکت',
     icon: 'envelope-open',
     to: { name: 'missionary-tickets' },
     active: route.name === 'missionary-tickets',
+    dedupeKey: 'ticket',
   },
 ]
 
@@ -91,12 +97,14 @@ export const buildCounselorMenuItems = (route) => [
     icon: 'menu',
     to: { name: 'counselor-dashboard' },
     active: route.name === 'counselor-dashboard',
+    dedupeKey: 'dashboard',
   },
   {
     title: 'مشاوره',
     icon: 'chat',
     to: { name: 'counselor-consultations' },
     active: route.name === 'counselor-consultations',
+    dedupeKey: 'consultation',
   },
 ]
 
@@ -110,15 +118,22 @@ const MENU_BUILDERS = {
  * Union of every panel section unlocked by `roles`, in role order (roles
  * come back from the API ordered by role id, so a user's base role's
  * sections lead and each additional role's sections are appended after).
+ * Items sharing a dedupeKey across roles are merged — only the first
+ * occurrence is kept (the primary role's version wins).
  */
 export const buildMergedMenuItems = (roles, route) => {
-  const seen = new Set()
+  const seenRoles = new Set()
+  const seenKeys = new Set()
   const items = []
   for (const roleName of roles ?? []) {
     const builder = MENU_BUILDERS[roleName]
-    if (!builder || seen.has(roleName)) continue
-    seen.add(roleName)
-    items.push(...builder(route))
+    if (!builder || seenRoles.has(roleName)) continue
+    seenRoles.add(roleName)
+    for (const item of builder(route)) {
+      if (item.dedupeKey && seenKeys.has(item.dedupeKey)) continue
+      if (item.dedupeKey) seenKeys.add(item.dedupeKey)
+      items.push(item)
+    }
   }
   return items
 }