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>

server/src/__tests__/invite-create-route.test.ts

@@ -0,0 +1,126 @@
+import express from "express";
+import request from "supertest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { accessRoutes } from "../routes/access.js";
+import { errorHandler } from "../middleware/index.js";
+
+const logActivityMock = vi.fn();
+
+vi.mock("../services/index.js", () => ({
+  accessService: () => ({
+    isInstanceAdmin: vi.fn(),
+    canUser: vi.fn(),
+    hasPermission: vi.fn(),
+  }),
+  agentService: () => ({
+    getById: vi.fn(),
+  }),
+  boardAuthService: () => ({
+    createChallenge: vi.fn(),
+    resolveBoardAccess: vi.fn(),
+    assertCurrentBoardKey: vi.fn(),
+    revokeBoardApiKey: vi.fn(),
+  }),
+  deduplicateAgentName: vi.fn(),
+  logActivity: (...args: unknown[]) => logActivityMock(...args),
+  notifyHireApproved: vi.fn(),
+}));
+
+function createDbStub() {
+  const createdInvite = {
+    id: "invite-1",
+    companyId: "company-1",
+    inviteType: "company_join",
+    allowedJoinTypes: "human",
+    tokenHash: "hash",
+    defaultsPayload: { humanRole: "viewer" },
+    expiresAt: new Date("2027-03-10T00:00:00.000Z"),
+    invitedByUserId: null,
+    revokedAt: null,
+    acceptedAt: null,
+    createdAt: new Date("2026-03-07T00:00:00.000Z"),
+    updatedAt: new Date("2026-03-07T00:00:00.000Z"),
+  };
+
+  return {
+    insert() {
+      return {
+        values() {
+          return {
+            returning() {
+              return Promise.resolve([createdInvite]);
+            },
+          };
+        },
+      };
+    },
+    select(_shape?: unknown) {
+      return {
+        from() {
+          const query = {
+            leftJoin() {
+              return query;
+            },
+            where() {
+              return Promise.resolve([{
+                name: "Acme Robotics",
+                brandColor: "#114488",
+                logoAssetId: "logo-1",
+              }]);
+            },
+          };
+          return query;
+        },
+      };
+    },
+  };
+}
+
+function createApp() {
+  const app = express();
+  app.use(express.json());
+  app.use((req, _res, next) => {
+    (req as any).actor = {
+      type: "board",
+      source: "local_implicit",
+      userId: null,
+      companyIds: ["company-1"],
+    };
+    next();
+  });
+  app.use(
+    "/api",
+    accessRoutes(createDbStub() as any, {
+      deploymentMode: "local_trusted",
+      deploymentExposure: "private",
+      bindHost: "127.0.0.1",
+      allowedHostnames: [],
+    }),
+  );
+  app.use(errorHandler);
+  return app;
+}
+
+describe("POST /companies/:companyId/invites", () => {
+  beforeEach(() => {
+    logActivityMock.mockReset();
+  });
+
+  it("returns an absolute invite URL using the request base URL", async () => {
+    const app = createApp();
+
+    const res = await request(app)
+      .post("/api/companies/company-1/invites")
+      .set("host", "paperclip.example")
+      .set("x-forwarded-proto", "https")
+      .send({
+        allowedJoinTypes: "human",
+        humanRole: "viewer",
+      });
+
+    expect(res.status).toBe(201);
+    expect(res.body.companyName).toBe("Acme Robotics");
+    expect(res.body.invitePath).toMatch(/^\/invite\/pcp_invite_/);
+    expect(res.body.inviteUrl).toMatch(/^https:\/\/paperclip\.example\/invite\/pcp_invite_/);
+  });
+});