[codex] Add resource membership controls (#6677)

## Thinking Path

> - Paperclip orchestrates AI-agent companies through company-scoped
issues, projects, agents, and board-visible workflows.
> - The board sidebar and project list are the daily navigation surface
for that control plane.
> - Users need to keep all projects and agents accessible while hiding
resources they have intentionally left from their own sidebar.
> - That requires user-scoped resource membership state backed by
company-scoped API and database contracts.
> - The branch also needed to preserve HTTP worktree login sessions and
keep the project list easier to scan after membership grouping.
> - This pull request adds resource membership controls, sidebar leave
actions, grouped/sortable project listings, and focused tests.
> - The benefit is a cleaner personal workspace view without weakening
company-scoped access to the underlying project or agent detail pages.

## What Changed

- Added `project_memberships` and `agent_memberships` tables with
API/shared/server contracts for current-user join/leave state.
- Renumbered the membership migration to `0090_resource_memberships`
after rebasing onto current `master`, and made it idempotent for anyone
who had applied the old branch-local `0087` migration.
- Added project and agent sidebar leave actions, plus list filtering
that waits for membership state before hiding resources.
- Added grouped project listing, project sorting controls, and reserved
row subtitle height for cleaner scanning.
- Fixed HTTP auth cookie security handling so HTTP worktree sessions can
persist.
- Updated focused server and UI tests for the new membership, sidebar,
project list, and auth behavior.

## Verification

- `pnpm exec vitest run server/src/__tests__/better-auth.test.ts
server/src/__tests__/resource-memberships-routes.test.ts
ui/src/pages/Projects.test.tsx
ui/src/components/SidebarProjects.test.tsx
ui/src/components/SidebarAgents.test.tsx
ui/src/components/MembershipAction.test.tsx
ui/src/components/EntityRow.test.tsx`
- Confirmed the branch is rebased on current `origin/master`.
- Confirmed the PR diff does not include `pnpm-lock.yaml` or
`.github/workflows` changes.

## Risks

- Migration safety: low to medium. The migration now uses `IF NOT
EXISTS` / guarded constraints and is numbered after current master
migrations, but it should still get CI coverage against fresh databases.
- UI behavior: low. Left resources are hidden from sidebar only after
membership state loads; direct detail access remains available.
- Auth behavior: low. Cookie security is relaxed only for HTTP/private
local-style origins where secure cookies would prevent login
persistence.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI GPT-5 Codex coding agent, tool-enabled shell/git workflow,
context window not exposed by 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 checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [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

Screenshot note: no browser screenshots were captured in this heartbeat;
the UI changes are covered by focused component tests above.

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

packages/shared/src/api.ts

@@ -18,6 +18,7 @@ export const API = {
   dashboard: `${API_PREFIX}/dashboard`,
   sidebarBadges: `${API_PREFIX}/sidebar-badges`,
   sidebarPreferences: `${API_PREFIX}/sidebar-preferences`,
+  resourceMemberships: `${API_PREFIX}/resource-memberships`,
   invites: `${API_PREFIX}/invites`,
   joinRequests: `${API_PREFIX}/join-requests`,
   members: `${API_PREFIX}/members`,

packages/shared/src/index.ts

@@ -659,6 +659,18 @@ export {
   upsertSidebarOrderPreferenceSchema,
   type UpsertSidebarOrderPreference,
 } from "./validators/sidebar-preferences.js";
+export {
+  resourceMembershipStateSchema,
+  updateResourceMembershipSchema,
+  type UpdateResourceMembership,
+} from "./validators/resource-memberships.js";
+export {
+  RESOURCE_MEMBERSHIP_STATES,
+  type ResourceMembershipResourceType,
+  type ResourceMembershipState,
+  type ResourceMemberships,
+  type ResourceMembershipUpdateResult,
+} from "./types/resource-memberships.js";
 
 export { workspaceRuntimeControlTargetSchema } from "./validators/execution-workspace.js";
 export {

packages/shared/src/types/index.ts

@@ -327,6 +327,14 @@ export type {
 } from "./user-profile.js";
 export type { SidebarBadges } from "./sidebar-badges.js";
 export type { SidebarOrderPreference } from "./sidebar-preferences.js";
+export type {
+  ResourceMembershipResourceType,
+  ResourceMembershipState,
+  ResourceMemberships,
+  ResourceMembershipUpdateResult,
+  UpdateResourceMembership,
+} from "./resource-memberships.js";
+export { RESOURCE_MEMBERSHIP_STATES } from "./resource-memberships.js";
 export type { InboxDismissal } from "./inbox-dismissal.js";
 export type {
   AccessUserProfile,

packages/shared/src/types/resource-memberships.ts

@@ -0,0 +1,21 @@
+export const RESOURCE_MEMBERSHIP_STATES = ["joined", "left"] as const;
+
+export type ResourceMembershipState = (typeof RESOURCE_MEMBERSHIP_STATES)[number];
+export type ResourceMembershipResourceType = "project" | "agent";
+
+export interface ResourceMemberships {
+  projectMemberships: Record<string, ResourceMembershipState>;
+  agentMemberships: Record<string, ResourceMembershipState>;
+  updatedAt: Date | null;
+}
+
+export interface UpdateResourceMembership {
+  state: ResourceMembershipState;
+}
+
+export interface ResourceMembershipUpdateResult {
+  resourceType: ResourceMembershipResourceType;
+  resourceId: string;
+  state: ResourceMembershipState;
+  updatedAt: Date;
+}

packages/shared/src/validators/index.ts

@@ -51,6 +51,11 @@ export {
   upsertSidebarOrderPreferenceSchema,
   type UpsertSidebarOrderPreference,
 } from "./sidebar-preferences.js";
+export {
+  resourceMembershipStateSchema,
+  updateResourceMembershipSchema,
+  type UpdateResourceMembership,
+} from "./resource-memberships.js";
 export {
   companySkillSourceTypeSchema,
   companySkillTrustLevelSchema,

packages/shared/src/validators/resource-memberships.ts

@@ -0,0 +1,10 @@
+import { z } from "zod";
+import { RESOURCE_MEMBERSHIP_STATES } from "../types/resource-memberships.js";
+
+export const resourceMembershipStateSchema = z.enum(RESOURCE_MEMBERSHIP_STATES);
+
+export const updateResourceMembershipSchema = z.object({
+  state: resourceMembershipStateSchema,
+});
+
+export type UpdateResourceMembership = z.infer<typeof updateResourceMembershipSchema>;