feat(platform): align account user membership

docs/CHATWOOT_PARITY_DEVELOPMENT_PLAN.md

@@ -16,12 +16,12 @@ Build GoChat as a Go backend that can directly reuse the frontend from `referenc
 
 ## Current Baseline
 
-- Current tracking checkpoint: 2026-06-06 after `c30020d feat(agents): align update route semantics`, with this implementation checkpoint prepared as `feat(agents): align list ordering`.
-- Latest implementation checkpoint: this checkpoint, prepared as `feat(agents): align list ordering`.
+- Current tracking checkpoint: 2026-06-06 after `fbb405a feat(agents): align list ordering`, with this implementation checkpoint prepared as `feat(platform): align account user membership`.
+- Latest implementation checkpoint: this checkpoint, prepared as `feat(platform): align account user membership`.
 - Latest documentation-only checkpoint: `8b378c7 docs: refresh parity tracker baseline`; this document is now the active follow-up plan and supersedes `.hermes/plans/*`.
-- Worktree status at this implementation checkpoint: P3.2 agents index ordering drift is closed for the reused settings and report filters: `GET /agents` now follows Chatwoot `Current.account.users.order_by_full_name` by ordering agents with `lower(users.name) ASC` before pagination. The preceding agents update-route/`auto_offline`, agents bulk invite, B10.3 CustomRole frontend update, and Phase 6 contacts pagination/active payload drifts are closed. Conversation transcript and custom-attribute response drifts are already closed. The fresh placeholder audit found remaining `chatwootParityStub` routes only in webhook handler-not-injected fallbacks, not in the reused dashboard account/contact/conversation/message/inbox critical path. P3.6 custom filters/custom attribute definitions and label CRUD are already in Review. B11.1a-B11.3e Captain/Copilot slices remain in Review; B12.1/B12.2/B12.3 smoke harnesses remain in Review; P5 durable job work through P5.13b is in Review. Next active implementation slice is the next named Phase 2/3 or Phase 6 drift from fresh reference/smoke evidence.
+- Worktree status at this implementation checkpoint: P3.2 platform account-user membership drift is closed: `POST /platform/api/v1/accounts/:account_id/account_users` now follows Chatwoot `find_or_initialize_by(user_id).update!`, returns raw `AccountUser` JSON with `200 OK`, updates duplicate memberships instead of failing, and `DELETE /account_users/destroy` accepts `user_id` as the Chatwoot collection destroy route while returning empty `200 OK`. The preceding agents list ordering, update-route/`auto_offline`, agents bulk invite, B10.3 CustomRole frontend update, and Phase 6 contacts pagination/active payload drifts are closed. Conversation transcript and custom-attribute response drifts are already closed. The fresh placeholder audit found remaining `chatwootParityStub` routes only in webhook handler-not-injected fallbacks, not in the reused dashboard account/contact/conversation/message/inbox critical path. P3.6 custom filters/custom attribute definitions and label CRUD are already in Review. B11.1a-B11.3e Captain/Copilot slices remain in Review; B12.1/B12.2/B12.3 smoke harnesses remain in Review; P5 durable job work through P5.13b is in Review. Next active implementation slice is the next named Phase 2/3 or Phase 6 drift from fresh reference/smoke evidence.
 - `go test ./...` passes.
-- Route dump succeeds with `TOTAL: 839` after adding the Chatwoot frontend-used agent `PATCH /api/v1/accounts/:account_id/agents/:agent_id` update route.
+- Route dump succeeds with `TOTAL: 840` after adding the Chatwoot platform account-user collection destroy route.
 - Route parity artifacts now exist under `docs/parity/` and are generated by `cmd/route_parity`.
 - Tracked frontend-critical route audit covers 277 Chatwoot routes: 270 exact, 0 method-compatible, 7 parameter-compatible, 0 missing. The 7 parameter-compatible routes are Gin-internal parameter-name differences for nested AgentCapacityPolicy users/inbox limits; the external URL shape is equivalent.
 - `/api/v1/widget` stubs are burned down and public inbox/contact/conversation/message core flows are backed by real handlers.
@@ -143,6 +143,7 @@ This ledger records the committed parity checkpoints that future slices should b
 
 | Commit | Scope | Verification summary | Follow-up state |
 | --- | --- | --- | --- |
+| `feat(platform): align account user membership` | Advances P3.2 platform account-user parity by matching `Platform::Api::V1::AccountUsersController`. Platform account-user index/create now return raw AccountUser JSON instead of the local `{ success, data }` envelope, create uses Chatwoot `find_or_initialize_by(user_id).update!` semantics so duplicate membership requests update role instead of failing, and the Chatwoot collection route `DELETE /platform/api/v1/accounts/:account_id/account_users/destroy?user_id=...` is registered while the legacy `/:user_id` alias remains. | `go test ./internal/handler/api/v1 -run PlatformAccountUser -count=1`; `go run ./cmd/dump_routes > docs/parity/gochat_routes.txt`; `go run ./cmd/route_parity`; `go test ./internal/handler/api/v1 ./internal/repository ./internal/router -count=1`; `go test ./...`; `git diff --check`. Route dump is `TOTAL: 840`; tracked route parity remains `270 exact, 7 parameter-compatible, 0 missing`. | Continue P3.2 permissions/invitations drift or the next Phase 6 reference/smoke finding. |
 | `feat(agents): align list ordering` | Advances P3.2 agents/settings parity by matching Chatwoot `AgentsController#index`, which renders `Current.account.users.order_by_full_name`. Account agent lists now order by `lower(users.name) ASC` before pagination while preserving account-user role, availability, auto-offline, inviter, account-user ID, and custom-role metadata. | `go test ./internal/handler/api/v1 -run AgentHandler -count=1`; `go test ./internal/handler/api/v1 ./internal/service ./internal/router -count=1`; `go test ./...`; `git diff --check`. No route changes; route dump remains `TOTAL: 839`. | Continue P3.2 account users/invitations/permissions drift or the next Phase 6 reference/smoke finding. |
 | `feat(agents): align update route semantics` | Advances P3.2 agents/settings parity by aligning update with Chatwoot `AgentsController#update` and the reused dashboard `ApiClient.update` path. Agent update now exposes `PATCH /api/v1/accounts/:account_id/agents/:agent_id` alongside the existing `PUT` alias, accepts nested `{ agent: ... }` payloads, preserves `auto_offline` when the field is omitted, and still applies explicit `auto_offline: false` like Rails strong params with `compact`. | `go test ./internal/handler/api/v1 -run AgentHandler -count=1`; `go test ./internal/service -run Agent -count=1`; `go run ./cmd/dump_routes > docs/parity/gochat_routes.txt`; `go run ./cmd/route_parity`; `go test ./internal/handler/api/v1 ./internal/service ./internal/router -count=1`; `go test ./...`; `git diff --check`. Route dump is `TOTAL: 839`; tracked route parity remains `270 exact, 7 parameter-compatible, 0 missing`. | Continue P3.2 account users/invitations/permissions drift or the next Phase 6 reference/smoke finding. |
 | `feat(agents): align bulk invite behavior` | Advances P3.2 agents/onboarding parity by aligning `POST /api/v1/accounts/:account_id/agents/bulk_create` with Chatwoot `AgentsController#bulk_create`. Bulk invite now treats the email list as a best-effort loop: invalid entries are skipped instead of failing the whole request, duplicate failures remain ignored, empty arrays return empty `200 OK`, valid agents in the same request are still created, and the local onboarding step is cleared after the bulk flow. | `go test ./internal/handler/api/v1 -run AgentHandler -count=1`; `go test ./internal/service -run Agent -count=1`; `go test ./internal/handler/api/v1 ./internal/service ./internal/router -count=1`; `go test ./...`; `git diff --check`. | Continue P3.2 account users/invitations/permissions drift or the next Phase 6 reference/smoke finding. |
@@ -1561,7 +1562,7 @@ Frontend-critical API groups to audit first:
 | ID | Area | Scope | Status |
 | --- | --- | --- | --- |
 | P3.1 | Auth/session/profile | Login, logout, current user, profile, availability, notification settings, Devise password reset, and confirmation. | Done |
-| P3.2 | Accounts/users/teams | Account settings, users, agents, teams, team members, invitations, roles, permissions. | Doing; account show/update/create/cache-key/active-at plus agents/teams/team-member, assignable-agent settings payloads, agents `order_by_full_name` index ordering, agents bulk invite best-effort behavior, and agent update PATCH/`auto_offline` presence semantics now have focused Chatwoot-style coverage. |
+| P3.2 | Accounts/users/teams | Account settings, users, agents, teams, team members, invitations, roles, permissions. | Doing; account show/update/create/cache-key/active-at plus agents/teams/team-member, assignable-agent settings payloads, platform account-user raw/idempotent membership, agents `order_by_full_name` index ordering, agents bulk invite best-effort behavior, and agent update PATCH/`auto_offline` presence semantics now have focused Chatwoot-style coverage. |
 | P3.3 | Inboxes/channels | Inbox CRUD, assignable agents, avatars, channel config, business hours, widget config. | Review; assignable-agent payload drift closed, broader inbox serializer drift remains evidence-driven. |
 | P3.4 | Conversations/messages | List filters, status changes, assignment, labels, private notes, attachments, drafts, typing/read events. | Review |
 | P3.5 | Contacts/companies | CRUD, merge, labels, notes, custom attributes, import/export, conversations relation, and shared attachments. | Doing |
@@ -2075,6 +2076,7 @@ Verification milestone gates:
 
 ## Progress Log
 
+- 2026-06-06: P3.2 platform account-user checkpoint prepared as `feat(platform): align account user membership`; audited Chatwoot `Platform::Api::V1::AccountUsersController` and platform routes. Platform account-user index/create now return raw AccountUser JSON, create updates existing memberships instead of failing duplicates, the user-permissible extra gate was removed to match the account-scoped reference controller, and collection destroy is available as `DELETE /account_users/destroy` with `user_id`. Focused platform account-user tests, route generation/parity, combined handler/repository/router tests, full `go test ./...`, and `git diff --check` passed; continue P3.2 permissions/invitations drift next.
 - 2026-06-06: P3.2 agents index-order checkpoint prepared as `feat(agents): align list ordering`; audited Chatwoot `AgentsController#index` and `User.order_by_full_name`. Account agent lists now join users and order by `lower(users.name) ASC` before pagination, while preserving account-user metadata in the Chatwoot agent serializer. Focused handler tests, combined handler/service/router tests, full `go test ./...`, and `git diff --check` passed; continue P3.2 account users/invitations drift next.
 - 2026-06-06: P3.2 agents update-route checkpoint prepared as `feat(agents): align update route semantics`; audited Chatwoot `AgentsController#update`, dashboard `agents.js`, and shared `ApiClient.update`. Agent update now exposes frontend-used `PATCH /api/v1/accounts/:account_id/agents/:agent_id` alongside the existing `PUT` alias, preserves existing `auto_offline` when omitted from the request, and still applies explicit `auto_offline: false` like Rails strong params with `compact`. Focused handler/service tests, route generation/parity, combined handler/service/router tests, full `go test ./...`, and `git diff --check` passed; continue P3.2 account users/invitations drift next.
 - 2026-06-06: P3.2 agents bulk invite checkpoint prepared as `feat(agents): align bulk invite behavior`; audited Chatwoot `AgentsController#bulk_create`, dashboard `agents.js`, and the reused onboarding/settings bulk invite path. Bulk invite now skips invalid email entries instead of rejecting the full request, keeps duplicate failures best-effort, creates valid agents from mixed arrays, returns empty `200 OK` for empty/no-op arrays, and clears the local onboarding step after the bulk flow. Focused handler/service tests, combined handler/service/router tests, full `go test ./...`, and `git diff --check` passed; continue P3.2 account users/invitations drift next.

docs/parity/gochat_routes.txt

@@ -106,6 +106,7 @@ DELETE /api/v1/widget/labels/:label_id
 DELETE /auth/sign_out
 DELETE /platform/api/v1/accounts/:account_id
 DELETE /platform/api/v1/accounts/:account_id/account_users/:user_id
+DELETE /platform/api/v1/accounts/:account_id/account_users/destroy
 DELETE /platform/api/v1/agent_bots/:id
 DELETE /platform/api/v1/apps/:id
 DELETE /platform/api/v1/apps/:id/permissibles/:permissible_id
@@ -837,4 +838,4 @@ PUT /public/api/v1/csat_survey/:id
 PUT /public/api/v1/inboxes/:inbox_id/contacts/:contact_id
 PUT /public/api/v1/inboxes/:inbox_id/contacts/:contact_id/conversations/:conversation_id/messages/:message_id
 PUT /widget/direct_uploads/:upload_uuid
-TOTAL: 839
+TOTAL: 840

internal/handler/api/v1/platform_account_user_handler.go

@@ -2,6 +2,7 @@ package v1
 
 import (
 	"net/http"
+	"strconv"
 
 	"github.com/gin-gonic/gin"
 
@@ -60,7 +61,7 @@ func (h *PlatformAccountUserHandler) Index(c *gin.Context) {
 		return
 	}
 
-	response.OK(c, accountUsers)
+	c.JSON(http.StatusOK, accountUsers)
 }
 
 // Create adds a user to an account.
@@ -84,39 +85,21 @@ func (h *PlatformAccountUserHandler) Create(c *gin.Context) {
 	}
 
 	var req struct {
-		UserID uint   `json:"user_id" binding:"required"`
-		Role   string `json:"role,omitempty"`
+		UserID uint    `json:"user_id" form:"user_id" binding:"required"`
+		Role   *string `json:"role,omitempty" form:"role"`
 	}
-	if err := c.ShouldBindJSON(&req); err != nil {
+	if err := c.ShouldBind(&req); err != nil {
 		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, err.Error())
 		return
 	}
 
-	// Verify PlatformApp has permissible access to this user
-	userPerm, err := h.permissibleRepo.FindByPlatformAppAndResource(c.Request.Context(), platformAppID, model.PermissibleTypeUser, req.UserID)
-	if err != nil || userPerm == nil {
-		response.AbortWithStatusError(c, http.StatusForbidden, response.ErrForbidden, "non permissible resource for user")
-		return
-	}
-
-	role := req.Role
-	if role == "" {
-		role = "agent"
-	}
-
-	if err := h.accountRepo.AddUserToAccount(c.Request.Context(), accountID, req.UserID, role); err != nil {
+	acctUser, err := h.accountRepo.UpsertAccountUser(c.Request.Context(), accountID, req.UserID, req.Role)
+	if err != nil {
 		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, err.Error())
 		return
 	}
 
-	// Return the created AccountUser
-	acctUser, err := h.accountRepo.FindAccountUserByUserAndAccount(c.Request.Context(), accountID, req.UserID)
-	if err != nil {
-		response.OK(c, gin.H{"account_id": accountID, "user_id": req.UserID, "role": role})
-		return
-	}
-
-	response.Created(c, acctUser)
+	c.JSON(http.StatusOK, acctUser)
 }
 
 // Destroy removes a user from an account.
@@ -130,8 +113,8 @@ func (h *PlatformAccountUserHandler) Destroy(c *gin.Context) {
 		return
 	}
 
-	userID, err := parseUintParam(c, "user_id")
-	if err != nil {
+	userID, err := platformAccountUserID(c)
+	if err != nil || userID == 0 {
 		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid user ID")
 		return
 	}
@@ -150,5 +133,19 @@ func (h *PlatformAccountUserHandler) Destroy(c *gin.Context) {
 		return
 	}
 
-	response.NoContent(c)
+	c.Status(http.StatusOK)
+}
+
+func platformAccountUserID(c *gin.Context) (uint, error) {
+	if raw := c.Param("user_id"); raw != "" {
+		id, err := strconv.ParseUint(raw, 10, 32)
+		return uint(id), err
+	}
+	var req struct {
+		UserID uint `json:"user_id" form:"user_id"`
+	}
+	if err := c.ShouldBind(&req); err != nil {
+		return 0, err
+	}
+	return req.UserID, nil
 }

internal/handler/api/v1/platform_e2e_test.go

@@ -97,6 +97,7 @@ func setupPlatformTokenTestE2E(t *testing.T) (*gin.Engine, *repository.Permissib
 	// Gin wildcard constraint: nested routes under accounts/:id must reuse :id.
 	platformGroup.GET("/accounts/:id/account_users", platformAccountUser.Index)
 	platformGroup.POST("/accounts/:id/account_users", platformAccountUser.Create)
+	platformGroup.DELETE("/accounts/:id/account_users/destroy", platformAccountUser.Destroy)
 	platformGroup.DELETE("/accounts/:id/account_users/:user_id", platformAccountUser.Destroy)
 
 	return engine, permissibleRepo, userRepo, accountRepo
@@ -403,7 +404,22 @@ func TestPlatformAccountUserE2E_Create(t *testing.T) {
 	req.Header.Set("Content-Type", "application/json")
 	engine.ServeHTTP(w, req)
 
-	assert.Equal(t, http.StatusCreated, w.Code)
+	require.Equal(t, http.StatusOK, w.Code)
+	var accountUser map[string]interface{}
+	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &accountUser))
+	assert.Equal(t, "agent", accountUser["role"])
+	assert.NotContains(t, accountUser, "success")
+
+	// Chatwoot find_or_initialize_by updates existing memberships instead of failing duplicates.
+	acctUserBody = fmt.Sprintf(`{"user_id": %s, "role": "administrator"}`, userID)
+	w = httptest.NewRecorder()
+	req, _ = http.NewRequest("POST", "/platform/api/v1/accounts/"+accountID+"/account_users", bytes.NewBufferString(acctUserBody))
+	req.Header.Set("Content-Type", "application/json")
+	engine.ServeHTTP(w, req)
+
+	require.Equal(t, http.StatusOK, w.Code)
+	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &accountUser))
+	assert.Equal(t, "administrator", accountUser["role"])
 }
 
 func TestPlatformAccountUserE2E_Index(t *testing.T) {
@@ -435,12 +451,23 @@ func TestPlatformAccountUserE2E_Index(t *testing.T) {
 	req, _ = http.NewRequest("POST", "/platform/api/v1/accounts/"+accountID+"/account_users", bytes.NewBufferString(acctUserBody))
 	req.Header.Set("Content-Type", "application/json")
 	engine.ServeHTTP(w, req)
-	require.Equal(t, http.StatusCreated, w.Code)
+	require.Equal(t, http.StatusOK, w.Code)
 
 	// Index account_users
 	w = httptest.NewRecorder()
 	req, _ = http.NewRequest("GET", "/platform/api/v1/accounts/"+accountID+"/account_users", nil)
 	engine.ServeHTTP(w, req)
 
+	require.Equal(t, http.StatusOK, w.Code)
+	var accountUsers []map[string]interface{}
+	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &accountUsers))
+	require.Len(t, accountUsers, 1)
+	assert.Equal(t, "agent", accountUsers[0]["role"])
+	assert.NotContains(t, accountUsers[0], "success")
+
+	// Chatwoot destroy is a collection route: DELETE /account_users/destroy with user_id param.
+	w = httptest.NewRecorder()
+	req, _ = http.NewRequest("DELETE", "/platform/api/v1/accounts/"+accountID+"/account_users/destroy?user_id="+userID, nil)
+	engine.ServeHTTP(w, req)
 	assert.Equal(t, http.StatusOK, w.Code)
 }

internal/repository/account_repo.go

@@ -100,6 +100,46 @@ func (r *AccountRepo) AddUserToAccount(ctx context.Context, accountID, userID ui
 	return r.db.WithContext(ctx).Create(&au).Error
 }
 
+// UpsertAccountUser creates or updates an AccountUser membership.
+// Reference: Chatwoot Platform::Api::V1::AccountUsersController#create uses
+// account.account_users.find_or_initialize_by(user_id: ...).update!(params).
+func (r *AccountRepo) UpsertAccountUser(ctx context.Context, accountID, userID uint, role *string) (*model.AccountUser, error) {
+	var au model.AccountUser
+	err := r.db.WithContext(ctx).
+		Where("account_id = ? AND user_id = ?", accountID, userID).
+		First(&au).Error
+	if err != nil && err != gorm.ErrRecordNotFound {
+		return nil, err
+	}
+
+	if err == gorm.ErrRecordNotFound {
+		au = model.AccountUser{
+			AccountID:    accountID,
+			UserID:       userID,
+			Role:         "agent",
+			Availability: "offline",
+			AutoOffline:  true,
+		}
+	}
+	if role != nil && *role != "" {
+		au.Role = *role
+	}
+
+	if err == gorm.ErrRecordNotFound {
+		if err := r.db.WithContext(ctx).Create(&au).Error; err != nil {
+			return nil, err
+		}
+		return &au, nil
+	}
+
+	if role != nil {
+		if err := r.db.WithContext(ctx).Model(&au).Update("role", au.Role).Error; err != nil {
+			return nil, err
+		}
+	}
+	return &au, nil
+}
+
 // RemoveUserFromAccount deletes an AccountUser association.
 func (r *AccountRepo) RemoveUserFromAccount(ctx context.Context, accountID, userID uint) error {
 	return r.db.WithContext(ctx).Exec(

internal/router/router.go

@@ -1830,6 +1830,7 @@ func registerPlatformTokenRoutes(g *gin.RouterGroup, h *Handlers) {
 	// Reference: Chatwoot Platform::Api::V1::AccountUsersController (nested under accounts)
 	g.GET("/accounts/:account_id/account_users", h.PlatformAccountUser.Index)
 	g.POST("/accounts/:account_id/account_users", h.PlatformAccountUser.Create)
+	g.DELETE("/accounts/:account_id/account_users/destroy", h.PlatformAccountUser.Destroy)
 	g.DELETE("/accounts/:account_id/account_users/:user_id", h.PlatformAccountUser.Destroy)
 }