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/routes/adapters.ts

@@ -41,7 +41,7 @@ import type { AdapterPluginRecord } from "../services/adapter-plugin-store.js";
 import type { ServerAdapterModule, AdapterConfigSchema } from "../adapters/types.js";
 import { loadExternalAdapterPackage, getUiParserSource, getOrExtractUiParserSource, reloadExternalAdapter } from "../adapters/plugin-loader.js";
 import { logger } from "../middleware/logger.js";
-import { assertBoard } from "./authz.js";
+import { assertBoardOrgAccess } from "./authz.js";
 import { BUILTIN_ADAPTER_TYPES } from "../adapters/builtin-adapter-types.js";
 
 const execFileAsync = promisify(execFile);
@@ -192,7 +192,7 @@ export function adapterRoutes() {
    * its model count, and load status.
    */
   router.get("/adapters", async (_req, res) => {
-    assertBoard(_req);
+    assertBoardOrgAccess(_req);
 
     const registeredAdapters = listServerAdapters();
     const externalRecords = new Map(
@@ -218,7 +218,7 @@ export function adapterRoutes() {
    * - version?: string — target version for npm packages
    */
   router.post("/adapters/install", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
 
     const { packageName, isLocalPath = false, version } = req.body as AdapterInstallRequest;
 
@@ -350,7 +350,7 @@ export function adapterRoutes() {
    * Request body: { "disabled": boolean }
    */
   router.patch("/adapters/:type", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
 
     const adapterType = req.params.type;
     const { disabled } = req.body as { disabled?: boolean };
@@ -385,7 +385,7 @@ export function adapterRoutes() {
    * keep the adapter they started with.
    */
   router.patch("/adapters/:type/override", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
 
     const adapterType = req.params.type;
     const { paused } = req.body as { paused?: boolean };
@@ -413,7 +413,7 @@ export function adapterRoutes() {
    * Unregister an external adapter. Built-in adapters cannot be removed.
    */
   router.delete("/adapters/:type", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
 
     const adapterType = req.params.type;
 
@@ -488,7 +488,7 @@ export function adapterRoutes() {
    * Cannot be used on built-in adapter types.
    */
   router.post("/adapters/:type/reload", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
 
     const type = req.params.type;
 
@@ -540,7 +540,7 @@ export function adapterRoutes() {
   // This is a convenience shortcut for remove + install with the same
   // package name, but without the risk of losing the store record.
   router.post("/adapters/:type/reinstall", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
 
     const type = req.params.type;
 
@@ -613,7 +613,7 @@ export function adapterRoutes() {
   const CONFIG_SCHEMA_TTL_MS = 30_000;
 
   router.get("/adapters/:type/config-schema", async (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
     const { type } = req.params;
 
     const adapter = findActiveServerAdapter(type);
@@ -651,7 +651,7 @@ export function adapterRoutes() {
   // The adapter package must export a "./ui-parser" entry in package.json
   // pointing to a self-contained ESM module with zero runtime dependencies.
   router.get("/adapters/:type/ui-parser.js", (req, res) => {
-    assertBoard(req);
+    assertBoardOrgAccess(req);
     const { type } = req.params;
     const source = getOrExtractUiParserSource(type);
     if (!source) {