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/pages/InstanceGeneralSettings.tsx

@@ -9,7 +9,9 @@ import {
 } from "@paperclipai/shared";
 import { LogOut, SlidersHorizontal } from "lucide-react";
 import { authApi } from "@/api/auth";
+import { healthApi } from "@/api/health";
 import { instanceSettingsApi } from "@/api/instanceSettings";
+import { ModeBadge } from "@/components/access/ModeBadge";
 import { Button } from "../components/ui/button";
 import { useBreadcrumbs } from "../context/BreadcrumbContext";
 import { queryKeys } from "../lib/queryKeys";
@@ -44,6 +46,11 @@ export function InstanceGeneralSettings() {
     queryKey: queryKeys.instance.generalSettings,
     queryFn: () => instanceSettingsApi.getGeneral(),
   });
+  const healthQuery = useQuery({
+    queryKey: queryKeys.health,
+    queryFn: () => healthApi.get(),
+    retry: false,
+  });
 
   const updateGeneralMutation = useMutation({
     mutationFn: instanceSettingsApi.updateGeneral,
@@ -93,6 +100,39 @@ export function InstanceGeneralSettings() {
         </div>
       )}
 
+      <section className="rounded-xl border border-border bg-card p-5">
+        <div className="space-y-3">
+          <div className="flex items-center gap-2">
+            <h2 className="text-sm font-semibold">Deployment and auth</h2>
+            <ModeBadge
+              deploymentMode={healthQuery.data?.deploymentMode}
+              deploymentExposure={healthQuery.data?.deploymentExposure}
+            />
+          </div>
+          <div className="text-sm text-muted-foreground">
+            {healthQuery.data?.deploymentMode === "local_trusted"
+              ? "Local trusted mode is optimized for a local operator. Browser requests run as local board context and no sign-in is required."
+              : healthQuery.data?.deploymentExposure === "public"
+                ? "Authenticated public mode requires sign-in for board access and is intended for public URLs."
+                : "Authenticated private mode requires sign-in and is intended for LAN, VPN, or other private-network deployments."}
+          </div>
+          <div className="grid gap-3 md:grid-cols-3">
+            <StatusBox
+              label="Auth readiness"
+              value={healthQuery.data?.authReady ? "Ready" : "Not ready"}
+            />
+            <StatusBox
+              label="Bootstrap status"
+              value={healthQuery.data?.bootstrapStatus === "bootstrap_pending" ? "Setup required" : "Ready"}
+            />
+            <StatusBox
+              label="Bootstrap invite"
+              value={healthQuery.data?.bootstrapInviteActive ? "Active" : "None"}
+            />
+          </div>
+        </div>
+      </section>
+
       <section className="rounded-xl border border-border bg-card p-5">
         <div className="flex items-start justify-between gap-4">
           <div className="space-y-1.5">
@@ -330,3 +370,12 @@ export function InstanceGeneralSettings() {
     </div>
   );
 }
+
+function StatusBox({ label, value }: { label: string; value: string }) {
+  return (
+    <div className="rounded-lg border border-border bg-background px-3 py-3">
+      <div className="text-xs font-medium uppercase tracking-wide text-muted-foreground">{label}</div>
+      <div className="mt-2 text-sm font-medium">{value}</div>
+    </div>
+  );
+}