feat: implement multi-user access and invite flows (#3784)

## Thinking Path

> - Paperclip is the control plane for autonomous AI companies.
> - V1 needs to stay local-first while also supporting shared,
authenticated deployments.
> - Human operators need real identities, company membership, invite
flows, profile surfaces, and company-scoped access controls.
> - Agents and operators also need the existing issue, inbox, workspace,
approval, and plugin flows to keep working under those authenticated
boundaries.
> - This branch accumulated the multi-user implementation, follow-up QA
fixes, workspace/runtime refinements, invite UX improvements,
release-branch conflict resolution, and review hardening.
> - This pull request consolidates that branch onto the current `master`
branch as a single reviewable PR.
> - The benefit is a complete multi-user implementation path with tests
and docs carried forward without dropping existing branch work.

## What Changed

- Added authenticated human-user access surfaces: auth/session routes,
company user directory, profile settings, company access/member
management, join requests, and invite management.
- Added invite creation, invite landing, onboarding, logo/branding,
invite grants, deduped join requests, and authenticated multi-user E2E
coverage.
- Tightened company-scoped and instance-admin authorization across
board, plugin, adapter, access, issue, and workspace routes.
- Added profile-image URL validation hardening, avatar preservation on
name-only profile updates, and join-request uniqueness migration cleanup
for pending human requests.
- Added an atomic member role/status/grants update path so Company
Access saves no longer leave partially updated permissions.
- Improved issue chat, inbox, assignee identity rendering,
sidebar/account/company navigation, workspace routing, and execution
workspace reuse behavior for multi-user operation.
- Added and updated server/UI tests covering auth, invites, membership,
issue workspace inheritance, plugin authz, inbox/chat behavior, and
multi-user flows.
- Merged current `public-gh/master` into this branch, resolved all
conflicts, and verified no `pnpm-lock.yaml` change is included in this
PR diff.

## Verification

- `pnpm exec vitest run server/src/__tests__/issues-service.test.ts
ui/src/components/IssueChatThread.test.tsx ui/src/pages/Inbox.test.tsx`
- `pnpm run preflight:workspace-links && pnpm exec vitest run
server/src/__tests__/plugin-routes-authz.test.ts`
- `pnpm exec vitest run server/src/__tests__/plugin-routes-authz.test.ts
server/src/__tests__/workspace-runtime-service-authz.test.ts
server/src/__tests__/access-validators.test.ts`
- `pnpm exec vitest run
server/src/__tests__/authz-company-access.test.ts
server/src/__tests__/routines-routes.test.ts
server/src/__tests__/sidebar-preferences-routes.test.ts
server/src/__tests__/approval-routes-idempotency.test.ts
server/src/__tests__/openclaw-invite-prompt-route.test.ts
server/src/__tests__/agent-cross-tenant-authz-routes.test.ts
server/src/__tests__/routines-e2e.test.ts`
- `pnpm exec vitest run server/src/__tests__/auth-routes.test.ts
ui/src/pages/CompanyAccess.test.tsx`
- `pnpm --filter @paperclipai/shared typecheck && pnpm --filter
@paperclipai/db typecheck && pnpm --filter @paperclipai/server
typecheck`
- `pnpm --filter @paperclipai/shared typecheck && pnpm --filter
@paperclipai/server typecheck`
- `pnpm --filter @paperclipai/ui typecheck`
- `pnpm db:generate`
- `npx playwright test --config tests/e2e/playwright.config.ts --list`
- Confirmed branch has no uncommitted changes and is `0` commits behind
`public-gh/master` before PR creation.
- Confirmed no `pnpm-lock.yaml` change is staged or present in the PR
diff.

## Risks

- High review surface area: this PR contains the accumulated multi-user
branch plus follow-up fixes, so reviewers should focus especially on
company-boundary enforcement and authenticated-vs-local deployment
behavior.
- UI behavior changed across invites, inbox, issue chat, access
settings, and sidebar navigation; no browser screenshots are included in
this branch-consolidation PR.
- Plugin install, upgrade, and lifecycle/config mutations now require
instance-admin access, which is intentional but may change expectations
for non-admin board users.
- A join-request dedupe migration rejects duplicate pending human
requests before creating unique indexes; deployments with unusual
historical duplicates should review the migration behavior.
- Company member role/status/grant saves now use a new combined
endpoint; older separate endpoints remain for compatibility.
- Full production build was not run locally in this heartbeat; CI should
cover the full matrix.

## Model Used

- OpenAI Codex coding agent, GPT-5-based model, CLI/tool-use
environment. Exact deployed model identifier and context window were not
exposed by the runtime.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

Note on screenshots: this is a branch-consolidation PR for an
already-developed multi-user branch, and no browser screenshots were
captured during this heartbeat.

---------

Co-authored-by: dotta <dotta@example.com>
Co-authored-by: Paperclip <noreply@paperclip.ing>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/lib/company-members.test.ts

@@ -0,0 +1,105 @@
+import { describe, expect, it } from "vitest";
+import type { CompanyMember, CompanyUserDirectoryEntry } from "@/api/access";
+import {
+  buildCompanyUserInlineOptions,
+  buildCompanyUserLabelMap,
+  buildCompanyUserProfileMap,
+  buildMarkdownMentionOptions,
+} from "./company-members";
+
+const activeMember = (overrides: Partial<CompanyMember>): CompanyMember => ({
+  id: overrides.id ?? "member-1",
+  companyId: overrides.companyId ?? "company-1",
+  principalType: "user",
+  principalId: overrides.principalId ?? "user-1",
+  status: overrides.status ?? "active",
+  membershipRole: overrides.membershipRole ?? "operator",
+  createdAt: overrides.createdAt ?? "2026-01-01T00:00:00.000Z",
+  updatedAt: overrides.updatedAt ?? "2026-01-01T00:00:00.000Z",
+  user: overrides.user === undefined
+    ? { id: overrides.principalId ?? "user-1", name: "Taylor", email: "taylor@example.com", image: null }
+    : overrides.user,
+  grants: overrides.grants ?? [],
+});
+
+describe("company-members helpers", () => {
+  it("builds labels from company member profiles", () => {
+    const labels = buildCompanyUserLabelMap([
+      activeMember({ principalId: "user-1", user: { id: "user-1", name: "Taylor", email: "taylor@example.com", image: null } }),
+      activeMember({ id: "member-2", principalId: "local-board", user: null }),
+    ]);
+
+    expect(labels.get("user-1")).toBe("Taylor");
+    expect(labels.get("local-board")).toBe("Board");
+  });
+
+  it("builds user profiles with labels and avatars", () => {
+    const profiles = buildCompanyUserProfileMap([
+      activeMember({
+        principalId: "user-1",
+        user: { id: "user-1", name: "Taylor", email: "taylor@example.com", image: "https://example.com/taylor.png" },
+      }),
+      activeMember({ id: "member-2", principalId: "local-board", user: null }),
+    ]);
+
+    expect(profiles.get("user-1")).toEqual({
+      label: "Taylor",
+      image: "https://example.com/taylor.png",
+    });
+    expect(profiles.get("local-board")).toEqual({
+      label: "Board",
+      image: null,
+    });
+  });
+
+  it("builds inline options for active users and excludes requested ids", () => {
+    const options = buildCompanyUserInlineOptions([
+      activeMember({ principalId: "user-1", user: { id: "user-1", name: "Taylor", email: "taylor@example.com", image: null } }),
+      activeMember({ id: "member-2", principalId: "user-2", user: { id: "user-2", name: "Jordan", email: "jordan@example.com", image: null } }),
+      activeMember({ id: "member-3", principalId: "user-3", status: "suspended" }),
+    ], { excludeUserIds: ["user-1"] });
+
+    expect(options).toEqual([
+      {
+        id: "user:user-2",
+        label: "Jordan",
+        searchText: "Jordan jordan@example.com user-2",
+      },
+    ]);
+  });
+
+  it("includes human users in markdown mention options", () => {
+    const options = buildMarkdownMentionOptions({
+      members: [activeMember({ principalId: "user-1", user: { id: "user-1", name: "Taylor", email: "taylor@example.com", image: null } })],
+      agents: [{ id: "agent-1", name: "CodexCoder", status: "active", icon: "code" }],
+      projects: [{ id: "project-1", name: "Paperclip App", color: "#336699" }],
+    });
+
+    expect(options).toEqual([
+      { id: "user:user-1", name: "Taylor", kind: "user", userId: "user-1" },
+      { id: "agent:agent-1", name: "CodexCoder", kind: "agent", agentId: "agent-1", agentIcon: "code" },
+      { id: "project:project-1", name: "Paperclip App", kind: "project", projectId: "project-1", projectColor: "#336699" },
+    ]);
+  });
+
+  it("accepts read-only directory entries for assignee and mention helpers", () => {
+    const users: CompanyUserDirectoryEntry[] = [
+      {
+        principalId: "user-1",
+        status: "active",
+        user: { id: "user-1", name: "Taylor", email: "taylor@example.com", image: null },
+      },
+    ];
+
+    expect(buildCompanyUserInlineOptions(users)).toEqual([
+      {
+        id: "user:user-1",
+        label: "Taylor",
+        searchText: "Taylor taylor@example.com user-1",
+      },
+    ]);
+    expect(buildMarkdownMentionOptions({ members: users })).toEqual([
+      { id: "user:user-1", name: "Taylor", kind: "user", userId: "user-1" },
+    ]);
+  });
+});