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.

artifacts/tx-os/tests/admin-inline-dependency-counts.spec.mjs

@@ -132,33 +132,11 @@ async function createNote(userId) {
   );
 }
 
-async function createConversationWithMessage(creatorId) {
-  const { rows } = await pool.query(
-    `INSERT INTO conversations (created_by, name_en) VALUES ($1, 'inline counts test') RETURNING id`,
-    [creatorId],
-  );
-  const conversationId = rows[0].id;
-  await pool.query(
-    `INSERT INTO messages (conversation_id, sender_id, content) VALUES ($1, $2, 'hi')`,
-    [conversationId, creatorId],
-  );
-  return conversationId;
-}
-
 test.afterAll(async () => {
-  // Order matters: messages / conversations / notes / service_orders
-  // must go before users (sender_id and created_by have no ON DELETE
-  // rule). service_orders must also go before services (service_id is
-  // ON DELETE RESTRICT).
+  // Order matters: notes / service_orders must go before users
+  // (user_id has no ON DELETE rule). service_orders must also go
+  // before services (service_id is ON DELETE RESTRICT).
   if (createdUserIds.length > 0) {
-    await pool.query(
-      `DELETE FROM messages WHERE sender_id = ANY($1::int[])`,
-      [createdUserIds],
-    );
-    await pool.query(
-      `DELETE FROM conversations WHERE created_by = ANY($1::int[])`,
-      [createdUserIds],
-    );
     await pool.query(
       `DELETE FROM notes WHERE user_id = ANY($1::int[])`,
       [createdUserIds],
@@ -259,8 +237,6 @@ const COUNT_TEXT = {
     serviceOrders: "orders",
     userNotes: "notes",
     userOrders: "orders",
-    userConversations: "convos",
-    userMessages: "messages",
   },
   ar: {
     appGroups: "مجموعة",
@@ -269,8 +245,6 @@ const COUNT_TEXT = {
     serviceOrders: "طلب",
     userNotes: "ملاحظة",
     userOrders: "طلب",
-    userConversations: "محادثة",
-    userMessages: "رسالة",
   },
 };
 
@@ -305,7 +279,6 @@ for (const lang of ["en", "ar"]) {
       // one so `serviceNoOrders` stays at zero orders and we can assert
       // its counts row is omitted.
       await createOrder(userWithDeps.id, serviceWithOrders.id);
-      await createConversationWithMessage(userWithDeps.id);
 
       // ---- Login ----
       await setLanguage(page, lang);
@@ -401,24 +374,12 @@ for (const lang of ["en", "ar"]) {
       const userOrdersChip = page.locator(
         `[data-testid="user-counts-orders-${userWithDeps.id}"]`,
       );
-      const convChip = page.locator(
-        `[data-testid="user-counts-conversations-${userWithDeps.id}"]`,
-      );
-      const msgChip = page.locator(
-        `[data-testid="user-counts-messages-${userWithDeps.id}"]`,
-      );
       await expect(notesChip).toBeVisible();
       await expect(userOrdersChip).toBeVisible();
-      await expect(convChip).toBeVisible();
-      await expect(msgChip).toBeVisible();
       await expect(notesChip).toContainText("1");
       await expect(notesChip).toContainText(labels.userNotes);
       await expect(userOrdersChip).toContainText("1");
       await expect(userOrdersChip).toContainText(labels.userOrders);
-      await expect(convChip).toContainText("1");
-      await expect(convChip).toContainText(labels.userConversations);
-      await expect(msgChip).toContainText("1");
-      await expect(msgChip).toContainText(labels.userMessages);
 
       // The bare user: row present (delete button), counts row absent.
       await expect(

artifacts/tx-os/tests/leave-group-successor.spec.mjs

@@ -1,245 +0,0 @@
-// UI test for the leave-group successor picker dialog in chat.tsx.
-//
-// Mirrors the backend coverage in
-// artifacts/api-server/tests/conversations-leave.test.mjs but at the UI layer:
-// it drives the actual dialog rendered by artifacts/tx-os/src/pages/chat.tsx
-// in a real browser, including:
-//   - The cancel path (close the dialog -> nothing changes).
-//   - The chosen-successor path (pick a specific member -> they become admin).
-//
-// Run with:
-//   DATABASE_URL=... pnpm --filter @workspace/tx-os exec playwright test
-//
-// Browser binaries can be installed once with:
-//   pnpm --filter @workspace/tx-os exec playwright install chromium
-//
-// The test seeds its own users + group via the database and cleans up after
-// itself, so it can run against the live dev environment without polluting it.
-
-import { test, expect } from "@playwright/test";
-import pg from "pg";
-
-const DATABASE_URL = process.env.DATABASE_URL;
-if (!DATABASE_URL) {
-  throw new Error("DATABASE_URL must be set to run the leave-group UI test");
-}
-
-// Same convention as artifacts/api-server/tests/conversations-leave.test.mjs:
-// a precomputed bcrypt hash of the literal password "TestPass123!".
-const TEST_PASSWORD = "TestPass123!";
-const TEST_PASSWORD_HASH =
-  "$2b$10$Bs636ukPMyz01nKrsi.5m.JlDXSN22AVCvn8cgPWWDbo5yJRQX2vu";
-
-const pool = new pg.Pool({ connectionString: DATABASE_URL });
-
-const createdUserIds = [];
-const createdConversationIds = [];
-
-function uniqueSuffix() {
-  return `${Date.now().toString(36)}_${Math.random().toString(36).slice(2, 8)}`;
-}
-
-async function createUser(prefix) {
-  const username = `${prefix}_${uniqueSuffix()}`;
-  const { rows } = await pool.query(
-    `INSERT INTO users (username, email, password_hash, display_name_en, preferred_language, is_active)
-     VALUES ($1, $2, $3, $4, 'en', true) RETURNING id`,
-    [username, `${username}@example.com`, TEST_PASSWORD_HASH, prefix],
-  );
-  const id = rows[0].id;
-  createdUserIds.push(id);
-  await pool.query(
-    `INSERT INTO user_roles (user_id, role_id)
-     SELECT $1, id FROM roles WHERE name = 'user'`,
-    [id],
-  );
-  return { id, username, displayName: prefix };
-}
-
-async function createGroup(creatorId, members) {
-  const groupName = `Successor Picker Test ${uniqueSuffix()}`;
-  const { rows } = await pool.query(
-    `INSERT INTO conversations (name_en, is_group, created_by)
-     VALUES ($1, true, $2) RETURNING id`,
-    [groupName, creatorId],
-  );
-  const conversationId = rows[0].id;
-  createdConversationIds.push(conversationId);
-
-  // Insert participants in deterministic joined_at order so that the auto
-  // promotion would pick the *first* non-admin member. The test then verifies
-  // that an explicit successor choice can override that default.
-  let offsetMs = 0;
-  for (const m of members) {
-    await pool.query(
-      `INSERT INTO conversation_participants
-         (conversation_id, user_id, is_admin, joined_at)
-       VALUES ($1, $2, $3, NOW() - ($4 || ' milliseconds')::interval)`,
-      [conversationId, m.userId, !!m.isAdmin, 10000 - offsetMs],
-    );
-    offsetMs += 1000;
-  }
-  return { conversationId, groupName };
-}
-
-async function getParticipants(conversationId) {
-  const { rows } = await pool.query(
-    `SELECT user_id AS "userId", is_admin AS "isAdmin"
-     FROM conversation_participants
-     WHERE conversation_id = $1
-     ORDER BY joined_at ASC`,
-    [conversationId],
-  );
-  return rows;
-}
-
-test.afterAll(async () => {
-  if (createdConversationIds.length > 0) {
-    await pool.query(
-      `DELETE FROM messages WHERE conversation_id = ANY($1::int[])`,
-      [createdConversationIds],
-    );
-    await pool.query(
-      `DELETE FROM conversation_participants WHERE conversation_id = ANY($1::int[])`,
-      [createdConversationIds],
-    );
-    await pool.query(
-      `DELETE FROM conversations WHERE id = ANY($1::int[])`,
-      [createdConversationIds],
-    );
-  }
-  if (createdUserIds.length > 0) {
-    await pool.query(
-      `DELETE FROM user_roles WHERE user_id = ANY($1::int[])`,
-      [createdUserIds],
-    );
-    await pool.query(`DELETE FROM users WHERE id = ANY($1::int[])`, [
-      createdUserIds,
-    ]);
-  }
-  await pool.end();
-});
-
-async function loginViaUi(page, username, password) {
-  await page.goto("/login");
-  await page.locator("#username").fill(username);
-  await page.locator("#password").fill(password);
-  await Promise.all([
-    page.waitForURL((url) => !url.pathname.endsWith("/login"), {
-      timeout: 15_000,
-    }),
-    page.locator('form button[type="submit"]').click(),
-  ]);
-}
-
-async function openLeaveDialog(page, groupName) {
-  await page.goto("/chat");
-  // Wait for the conversation list to load and click the seeded group.
-  await page.getByRole("button", { name: new RegExp(groupName) }).first().click();
-  // Open the actions sheet, then "Leave group".
-  await page.locator('[data-testid="button-chat-actions"]').click();
-  await expect(page.locator('[data-testid="dialog-chat-actions"]')).toBeVisible();
-  await page.locator('[data-testid="button-leave-group"]').click();
-  await expect(page.locator('[data-testid="dialog-confirm-leave"]')).toBeVisible();
-  await expect(page.locator('[data-testid="successor-chooser"]')).toBeVisible();
-}
-
-test.describe("Leave group: successor picker dialog", () => {
-  test("cancel path leaves the group and admin assignments unchanged", async ({
-    page,
-  }) => {
-    const admin = await createUser("leave_ui_cancel_admin");
-    const m1 = await createUser("leave_ui_cancel_m1");
-    const m2 = await createUser("leave_ui_cancel_m2");
-    const { conversationId, groupName } = await createGroup(admin.id, [
-      { userId: admin.id, isAdmin: true },
-      { userId: m1.id, isAdmin: false },
-      { userId: m2.id, isAdmin: false },
-    ]);
-
-    await loginViaUi(page, admin.username, TEST_PASSWORD);
-    await openLeaveDialog(page, groupName);
-
-    // Auto option is selected by default; both successor options are listed.
-    await expect(
-      page.locator('[data-testid="successor-option-auto"] input[type="radio"]'),
-    ).toBeChecked();
-    await expect(
-      page.locator(`[data-testid="successor-option-${m1.id}"]`),
-    ).toBeVisible();
-    await expect(
-      page.locator(`[data-testid="successor-option-${m2.id}"]`),
-    ).toBeVisible();
-
-    // Click the Cancel button inside the leave dialog.
-    await page
-      .locator('[data-testid="dialog-confirm-leave"] button')
-      .filter({ hasText: /^(Cancel|إلغاء)$/ })
-      .click();
-
-    await expect(
-      page.locator('[data-testid="dialog-confirm-leave"]'),
-    ).toBeHidden();
-
-    // Membership and admin flags must be unchanged after a cancel.
-    const parts = await getParticipants(conversationId);
-    expect(parts).toHaveLength(3);
-    const adminRow = parts.find((p) => p.userId === admin.id);
-    const m1Row = parts.find((p) => p.userId === m1.id);
-    const m2Row = parts.find((p) => p.userId === m2.id);
-    expect(adminRow?.isAdmin).toBe(true);
-    expect(m1Row?.isAdmin).toBe(false);
-    expect(m2Row?.isAdmin).toBe(false);
-  });
-
-  test("picking a specific successor promotes that member, not the auto pick", async ({
-    page,
-  }) => {
-    const admin = await createUser("leave_ui_pick_admin");
-    const m1 = await createUser("leave_ui_pick_m1"); // would be the auto pick
-    const m2 = await createUser("leave_ui_pick_m2"); // explicitly chosen
-    const { conversationId, groupName } = await createGroup(admin.id, [
-      { userId: admin.id, isAdmin: true },
-      { userId: m1.id, isAdmin: false },
-      { userId: m2.id, isAdmin: false },
-    ]);
-
-    await loginViaUi(page, admin.username, TEST_PASSWORD);
-    await openLeaveDialog(page, groupName);
-
-    // Pick the later-joined member (m2) as the successor.
-    await page
-      .locator(`[data-testid="successor-option-${m2.id}"] input[type="radio"]`)
-      .check();
-    await expect(
-      page.locator(`[data-testid="successor-option-${m2.id}"] input[type="radio"]`),
-    ).toBeChecked();
-    await expect(
-      page.locator('[data-testid="successor-option-auto"] input[type="radio"]'),
-    ).not.toBeChecked();
-
-    // Confirm the leave.
-    const leavePromise = page.waitForResponse(
-      (resp) =>
-        resp.url().includes(`/api/conversations/${conversationId}/leave`) &&
-        resp.request().method() === "POST",
-    );
-    await page.locator('[data-testid="button-confirm-leave"]').click();
-    const leaveResp = await leavePromise;
-    expect(leaveResp.status()).toBe(200);
-
-    // The dialog closes and the user is returned to the conversation list.
-    await expect(
-      page.locator('[data-testid="dialog-confirm-leave"]'),
-    ).toBeHidden();
-
-    // The chosen successor — not the auto pick — must be the new admin.
-    const parts = await getParticipants(conversationId);
-    expect(parts).toHaveLength(2);
-    expect(parts.find((p) => p.userId === admin.id)).toBeUndefined();
-    const m1Row = parts.find((p) => p.userId === m1.id);
-    const m2Row = parts.find((p) => p.userId === m2.id);
-    expect(m1Row?.isAdmin).toBe(false);
-    expect(m2Row?.isAdmin).toBe(true);
-  });
-});