feat: v2.7.6 — edit users in one form, Settings → Account, display names, copy over plain HTTP

- Users page: one Edit user form (display name, email, role, active, a new or
  generated password, workspaces given or taken back, sign out everywhere),
  validated as a whole before anything is written (PATCH /api/users/:id,
  GET /api/users/:id); users.display_name/email added migration-safe.
- Settings → Account for every signed-in user: profile, own password (the
  current one required, this login kept), sign out other devices
  (/api/me/account, /api/me/password, /api/me/sign-out-others; login cookie
  only, never a pane token).
- Display names wherever a person is named (sidebar, workspace owner groups,
  Users page and audit log); owner_display_name / reader_display additive.
- Users page: admins add and remove Claude/Codex pool accounts.
- Folder browser: an admin with their own Linux account opens in their home;
  the "Server folder" tick opens the host's (never remembered).
- AI Proxy: "Config 9router" beside Add profile when 9router is installed,
  opened on the dashboard's own host (GET /api/ai-proxies/9router).
- Terminal: a tmux selection reaches the clipboard over plain HTTP too
  (writeClipboard's textarea fallback, focus handed back).
- Chat: a file the session touched outside the workspace previews
  (GET /api/sessions/:id/file).
- install-system: `!requiretty` only when visudo accepts it (sudo-rs on
  Ubuntu 25.10+ rejects the setting).
- openapi.yaml regenerated; docs (API, SERVER-MODE, LANES) updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

skills/update-project-docs/SKILL.md

@@ -52,7 +52,7 @@ Update docs **in the same change-set (PR/commit) as the code**, before claiming
 - **Tables**: markdown tables stay pipe-balanced (header column count == every row).
 - **Mermaid**: each edited block still parses (valid `source --> target: label`).
 - **i18n**: every new English string has a `vi` entry in `client/src/i18n/locales/vi/`.
-- **Format/tests**: run `npm run format` (or `prettier --check` on touched files); for any code touched, run the verification from `CLAUDE.md` (`npm run test:server` / `test:client`).
+- **Format/tests**: run `npm run format` (or `prettier --check` on touched files); for any code touched, run only the related tests per `CLAUDE.md` (`npm run test:server -- <test file>` / `npx vitest related <files> --run`); a full suite only when `CLAUDE.md` says it is needed.
 - State exactly which docs were updated and which were intentionally skipped (with reason), mirroring the repo's verification policy.
 
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