Task #511: Fully remove Chat feature

Destructive removal per user confirmation ("حذف نهائي ما يرجع").

Removed:
- API: routes/conversations.ts, schema/conversations.ts, all chat
  socket handlers in src/index.ts, /admin/users/:id/dependents/
  conversations+messages endpoints, conversation/message dependency
  counts in users/stats routes.
- Web: pages/chat.tsx, /chat route, dock chat filter, MessageSquare
  icon and messages StatCard on home, all chat-related UI in
  notifications + admin (dependency badges, delete-dialog rows,
  UserDependentConversations/Messages sections, count map keys).
- Locales: nav.chat, home.stats.messages, full chat.* block,
  admin.deleteUser conv/msgCount, admin.users.counts.conv/msg,
  admin.audit.unit.conversation_*/message_*, admin.dependents.user*.
- OpenAPI spec: tags, all /conversations/* paths, conv/msg dependent
  paths, related schemas (ConversationWithDetails, MessageWithSender,
  UserDependentConversation/MessageItem+Page, etc.), UserProfile and
  UserDeletionConflict conv/msg fields, HomeStats.unreadMessages.
  Regenerated client via orval.
- Database: dropped message_reads, messages,
  conversation_participants, conversations (CASCADE); deleted
  notifications with related_type='conversation' or type='chat';
  deleted apps row with slug='chat'; ran drizzle push-force.
- Seed: removed chat:access permission + user-role assignment +
  seeded chat app entry from scripts/src/seed.ts.
- Tests: deleted conversations-leave.test.mjs; cleaned chat refs from
  list-dependency-counts, delete-force-warnings, audit-log-coverage,
  and admin-inline-dependency-counts (e2e) — replaced chat dependents
  with note dependents where needed for force-delete coverage.

Notes preserved: notes.tsx noConversationsYet/conversationWith refer
to NOTE THREADS (not chat) and were intentionally NOT touched.

executive-meetings.ts not modified per replit.md restriction.
Pre-existing flaky test failures in executive-meetings/group/etc
suites remain unrelated to this task.

lib/api-zod/src/generated/api.ts

@@ -1332,456 +1332,6 @@ export const ListServiceCategoriesResponse = zod.array(
   ListServiceCategoriesResponseItem,
 );
 
-/**
- * @summary List conversations for current user
- */
-export const ListConversationsResponseItem = zod.object({
-  id: zod.number(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean(),
-  createdBy: zod.number(),
-  participants: zod.array(
-    zod.object({
-      id: zod.number(),
-      username: zod.string(),
-      displayNameAr: zod.string().nullish(),
-      displayNameEn: zod.string().nullish(),
-      avatarUrl: zod.string().nullish(),
-      isAdmin: zod.boolean(),
-    }),
-  ),
-  lastMessage: zod
-    .object({
-      id: zod.number(),
-      conversationId: zod.number(),
-      senderId: zod.number(),
-      content: zod.string(),
-      kind: zod.enum([
-        "user",
-        "group_renamed",
-        "members_added",
-        "member_removed",
-        "member_left",
-        "admin_promoted",
-      ]),
-      meta: zod.record(zod.string(), zod.unknown()).nullish(),
-      sender: zod.object({
-        id: zod.number(),
-        username: zod.string(),
-        displayNameAr: zod.string().nullish(),
-        displayNameEn: zod.string().nullish(),
-        avatarUrl: zod.string().nullish(),
-        isAdmin: zod.boolean(),
-      }),
-      createdAt: zod.coerce.date(),
-      updatedAt: zod.coerce.date(),
-    })
-    .nullish(),
-  unreadCount: zod.number(),
-  isMuted: zod.boolean(),
-  isArchived: zod.boolean(),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-export const ListConversationsResponse = zod.array(
-  ListConversationsResponseItem,
-);
-
-/**
- * @summary Create a conversation
- */
-export const CreateConversationBody = zod.object({
-  participantIds: zod.array(zod.number()),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean().optional(),
-});
-
-/**
- * @summary Get conversation by ID
- */
-export const GetConversationParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const GetConversationResponse = zod.object({
-  id: zod.number(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean(),
-  createdBy: zod.number(),
-  participants: zod.array(
-    zod.object({
-      id: zod.number(),
-      username: zod.string(),
-      displayNameAr: zod.string().nullish(),
-      displayNameEn: zod.string().nullish(),
-      avatarUrl: zod.string().nullish(),
-      isAdmin: zod.boolean(),
-    }),
-  ),
-  lastMessage: zod
-    .object({
-      id: zod.number(),
-      conversationId: zod.number(),
-      senderId: zod.number(),
-      content: zod.string(),
-      kind: zod.enum([
-        "user",
-        "group_renamed",
-        "members_added",
-        "member_removed",
-        "member_left",
-        "admin_promoted",
-      ]),
-      meta: zod.record(zod.string(), zod.unknown()).nullish(),
-      sender: zod.object({
-        id: zod.number(),
-        username: zod.string(),
-        displayNameAr: zod.string().nullish(),
-        displayNameEn: zod.string().nullish(),
-        avatarUrl: zod.string().nullish(),
-        isAdmin: zod.boolean(),
-      }),
-      createdAt: zod.coerce.date(),
-      updatedAt: zod.coerce.date(),
-    })
-    .nullish(),
-  unreadCount: zod.number(),
-  isMuted: zod.boolean(),
-  isArchived: zod.boolean(),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-
-/**
- * @summary Update conversation properties (admin only)
- */
-export const UpdateConversationParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const UpdateConversationBody = zod.object({
-  avatarUrl: zod.string().nullish(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-});
-
-export const UpdateConversationResponse = zod.object({
-  id: zod.number(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean(),
-  createdBy: zod.number(),
-  participants: zod.array(
-    zod.object({
-      id: zod.number(),
-      username: zod.string(),
-      displayNameAr: zod.string().nullish(),
-      displayNameEn: zod.string().nullish(),
-      avatarUrl: zod.string().nullish(),
-      isAdmin: zod.boolean(),
-    }),
-  ),
-  lastMessage: zod
-    .object({
-      id: zod.number(),
-      conversationId: zod.number(),
-      senderId: zod.number(),
-      content: zod.string(),
-      kind: zod.enum([
-        "user",
-        "group_renamed",
-        "members_added",
-        "member_removed",
-        "member_left",
-        "admin_promoted",
-      ]),
-      meta: zod.record(zod.string(), zod.unknown()).nullish(),
-      sender: zod.object({
-        id: zod.number(),
-        username: zod.string(),
-        displayNameAr: zod.string().nullish(),
-        displayNameEn: zod.string().nullish(),
-        avatarUrl: zod.string().nullish(),
-        isAdmin: zod.boolean(),
-      }),
-      createdAt: zod.coerce.date(),
-      updatedAt: zod.coerce.date(),
-    })
-    .nullish(),
-  unreadCount: zod.number(),
-  isMuted: zod.boolean(),
-  isArchived: zod.boolean(),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-
-/**
- * @summary Add participants to a group conversation (admin only)
- */
-export const AddConversationParticipantsParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const AddConversationParticipantsBody = zod.object({
-  userIds: zod.array(zod.number()),
-});
-
-export const AddConversationParticipantsResponse = zod.object({
-  id: zod.number(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean(),
-  createdBy: zod.number(),
-  participants: zod.array(
-    zod.object({
-      id: zod.number(),
-      username: zod.string(),
-      displayNameAr: zod.string().nullish(),
-      displayNameEn: zod.string().nullish(),
-      avatarUrl: zod.string().nullish(),
-      isAdmin: zod.boolean(),
-    }),
-  ),
-  lastMessage: zod
-    .object({
-      id: zod.number(),
-      conversationId: zod.number(),
-      senderId: zod.number(),
-      content: zod.string(),
-      kind: zod.enum([
-        "user",
-        "group_renamed",
-        "members_added",
-        "member_removed",
-        "member_left",
-        "admin_promoted",
-      ]),
-      meta: zod.record(zod.string(), zod.unknown()).nullish(),
-      sender: zod.object({
-        id: zod.number(),
-        username: zod.string(),
-        displayNameAr: zod.string().nullish(),
-        displayNameEn: zod.string().nullish(),
-        avatarUrl: zod.string().nullish(),
-        isAdmin: zod.boolean(),
-      }),
-      createdAt: zod.coerce.date(),
-      updatedAt: zod.coerce.date(),
-    })
-    .nullish(),
-  unreadCount: zod.number(),
-  isMuted: zod.boolean(),
-  isArchived: zod.boolean(),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-
-/**
- * @summary Remove a participant from a group conversation (admin only)
- */
-export const RemoveConversationParticipantParams = zod.object({
-  id: zod.coerce.number(),
-  userId: zod.coerce.number(),
-});
-
-export const RemoveConversationParticipantResponse = zod.object({
-  id: zod.number(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean(),
-  createdBy: zod.number(),
-  participants: zod.array(
-    zod.object({
-      id: zod.number(),
-      username: zod.string(),
-      displayNameAr: zod.string().nullish(),
-      displayNameEn: zod.string().nullish(),
-      avatarUrl: zod.string().nullish(),
-      isAdmin: zod.boolean(),
-    }),
-  ),
-  lastMessage: zod
-    .object({
-      id: zod.number(),
-      conversationId: zod.number(),
-      senderId: zod.number(),
-      content: zod.string(),
-      kind: zod.enum([
-        "user",
-        "group_renamed",
-        "members_added",
-        "member_removed",
-        "member_left",
-        "admin_promoted",
-      ]),
-      meta: zod.record(zod.string(), zod.unknown()).nullish(),
-      sender: zod.object({
-        id: zod.number(),
-        username: zod.string(),
-        displayNameAr: zod.string().nullish(),
-        displayNameEn: zod.string().nullish(),
-        avatarUrl: zod.string().nullish(),
-        isAdmin: zod.boolean(),
-      }),
-      createdAt: zod.coerce.date(),
-      updatedAt: zod.coerce.date(),
-    })
-    .nullish(),
-  unreadCount: zod.number(),
-  isMuted: zod.boolean(),
-  isArchived: zod.boolean(),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-
-/**
- * @summary Update per-user state (mute, archive)
- */
-export const UpdateConversationStateParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const UpdateConversationStateBody = zod.object({
-  isMuted: zod.boolean().optional(),
-  isArchived: zod.boolean().optional(),
-});
-
-export const UpdateConversationStateResponse = zod.object({
-  id: zod.number(),
-  nameAr: zod.string().nullish(),
-  nameEn: zod.string().nullish(),
-  avatarUrl: zod.string().nullish(),
-  isGroup: zod.boolean(),
-  createdBy: zod.number(),
-  participants: zod.array(
-    zod.object({
-      id: zod.number(),
-      username: zod.string(),
-      displayNameAr: zod.string().nullish(),
-      displayNameEn: zod.string().nullish(),
-      avatarUrl: zod.string().nullish(),
-      isAdmin: zod.boolean(),
-    }),
-  ),
-  lastMessage: zod
-    .object({
-      id: zod.number(),
-      conversationId: zod.number(),
-      senderId: zod.number(),
-      content: zod.string(),
-      kind: zod.enum([
-        "user",
-        "group_renamed",
-        "members_added",
-        "member_removed",
-        "member_left",
-        "admin_promoted",
-      ]),
-      meta: zod.record(zod.string(), zod.unknown()).nullish(),
-      sender: zod.object({
-        id: zod.number(),
-        username: zod.string(),
-        displayNameAr: zod.string().nullish(),
-        displayNameEn: zod.string().nullish(),
-        avatarUrl: zod.string().nullish(),
-        isAdmin: zod.boolean(),
-      }),
-      createdAt: zod.coerce.date(),
-      updatedAt: zod.coerce.date(),
-    })
-    .nullish(),
-  unreadCount: zod.number(),
-  isMuted: zod.boolean(),
-  isArchived: zod.boolean(),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-
-/**
- * @summary Leave a group conversation
- */
-export const LeaveConversationParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const LeaveConversationBody = zod.object({
-  successorId: zod
-    .number()
-    .nullish()
-    .describe(
-      "When the leaver is the only admin, optionally name a specific\nremaining member to promote. Omit (or send null) to keep the\nautomatic behavior of promoting the longest-tenured member.\n",
-    ),
-});
-
-export const LeaveConversationResponse = zod.object({
-  success: zod.boolean(),
-});
-
-/**
- * @summary List messages in a conversation
- */
-export const ListMessagesParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const ListMessagesResponseItem = zod.object({
-  id: zod.number(),
-  conversationId: zod.number(),
-  senderId: zod.number(),
-  content: zod.string(),
-  kind: zod.enum([
-    "user",
-    "group_renamed",
-    "members_added",
-    "member_removed",
-    "member_left",
-    "admin_promoted",
-  ]),
-  meta: zod.record(zod.string(), zod.unknown()).nullish(),
-  sender: zod.object({
-    id: zod.number(),
-    username: zod.string(),
-    displayNameAr: zod.string().nullish(),
-    displayNameEn: zod.string().nullish(),
-    avatarUrl: zod.string().nullish(),
-    isAdmin: zod.boolean(),
-  }),
-  createdAt: zod.coerce.date(),
-  updatedAt: zod.coerce.date(),
-});
-export const ListMessagesResponse = zod.array(ListMessagesResponseItem);
-
-/**
- * @summary Send a message
- */
-export const SendMessageParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const SendMessageBody = zod.object({
-  content: zod.string(),
-});
-
-/**
- * @summary Mark all messages in conversation as read
- */
-export const MarkConversationReadParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const MarkConversationReadResponse = zod.object({
-  success: zod.boolean(),
-});
-
 /**
  * @summary List notifications for current user
  */
@@ -1888,18 +1438,6 @@ export const ListUsersResponseItem = zod.object({
     .describe(
       "Number of service orders owned by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
     ),
-  conversationCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of conversations created by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
-  messageCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of messages authored by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
 });
 export const ListUsersResponse = zod.array(ListUsersResponseItem);
 
@@ -1972,18 +1510,6 @@ export const GetUserResponse = zod.object({
     .describe(
       "Number of service orders owned by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
     ),
-  conversationCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of conversations created by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
-  messageCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of messages authored by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
 });
 
 /**
@@ -2044,18 +1570,6 @@ export const UpdateUserResponse = zod.object({
     .describe(
       "Number of service orders owned by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
     ),
-  conversationCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of conversations created by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
-  messageCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of messages authored by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
 });
 
 /**
@@ -2169,18 +1683,6 @@ export const AddUserRoleResponse = zod.object({
     .describe(
       "Number of service orders owned by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
     ),
-  conversationCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of conversations created by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
-  messageCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of messages authored by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
 });
 
 /**
@@ -2231,18 +1733,6 @@ export const RemoveUserRoleResponse = zod.object({
     .describe(
       "Number of service orders owned by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
     ),
-  conversationCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of conversations created by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
-  messageCount: zod
-    .number()
-    .optional()
-    .describe(
-      "Number of messages authored by this user. Populated only by the\nadmin list endpoint (GET \/users).\n",
-    ),
 });
 
 /**
@@ -2878,7 +2368,6 @@ export const GetHomeStatsResponse = zod.object({
   totalApps: zod.number(),
   totalServices: zod.number(),
   unreadNotifications: zod.number(),
-  unreadMessages: zod.number(),
   totalUsers: zod.number(),
 });
 
@@ -3830,88 +3319,3 @@ export const GetAdminUserDependentOrdersResponse = zod.object({
   offset: zod.number(),
   nextOffset: zod.number().nullable(),
 });
-
-/**
- * @summary List conversations created by a user
- */
-export const GetAdminUserDependentConversationsParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const getAdminUserDependentConversationsQueryLimitDefault = 50;
-export const getAdminUserDependentConversationsQueryLimitMax = 200;
-
-export const getAdminUserDependentConversationsQueryOffsetDefault = 0;
-export const getAdminUserDependentConversationsQueryOffsetMin = 0;
-
-export const GetAdminUserDependentConversationsQueryParams = zod.object({
-  limit: zod.coerce
-    .number()
-    .min(1)
-    .max(getAdminUserDependentConversationsQueryLimitMax)
-    .default(getAdminUserDependentConversationsQueryLimitDefault),
-  offset: zod.coerce
-    .number()
-    .min(getAdminUserDependentConversationsQueryOffsetMin)
-    .default(getAdminUserDependentConversationsQueryOffsetDefault),
-});
-
-export const GetAdminUserDependentConversationsResponse = zod.object({
-  items: zod.array(
-    zod.object({
-      id: zod.number(),
-      nameAr: zod.string().nullable(),
-      nameEn: zod.string().nullable(),
-      isGroup: zod.boolean(),
-      createdAt: zod.coerce.date(),
-    }),
-  ),
-  totalCount: zod.number(),
-  limit: zod.number(),
-  offset: zod.number(),
-  nextOffset: zod.number().nullable(),
-});
-
-/**
- * @summary List messages sent by a user
- */
-export const GetAdminUserDependentMessagesParams = zod.object({
-  id: zod.coerce.number(),
-});
-
-export const getAdminUserDependentMessagesQueryLimitDefault = 50;
-export const getAdminUserDependentMessagesQueryLimitMax = 200;
-
-export const getAdminUserDependentMessagesQueryOffsetDefault = 0;
-export const getAdminUserDependentMessagesQueryOffsetMin = 0;
-
-export const GetAdminUserDependentMessagesQueryParams = zod.object({
-  limit: zod.coerce
-    .number()
-    .min(1)
-    .max(getAdminUserDependentMessagesQueryLimitMax)
-    .default(getAdminUserDependentMessagesQueryLimitDefault),
-  offset: zod.coerce
-    .number()
-    .min(getAdminUserDependentMessagesQueryOffsetMin)
-    .default(getAdminUserDependentMessagesQueryOffsetDefault),
-});
-
-export const GetAdminUserDependentMessagesResponse = zod.object({
-  items: zod.array(
-    zod.object({
-      id: zod.number(),
-      content: zod.string(),
-      kind: zod.string(),
-      createdAt: zod.coerce.date(),
-      conversationId: zod.number(),
-      conversationNameAr: zod.string().nullable(),
-      conversationNameEn: zod.string().nullable(),
-      conversationIsGroup: zod.boolean(),
-    }),
-  ),
-  totalCount: zod.number(),
-  limit: zod.number(),
-  offset: zod.number(),
-  nextOffset: zod.number().nullable(),
-});