feat(environments): env CRUD, workspace switcher, CLI + MCP parity (#68)

Environment lanes existed as seeded rows (production/preview/development)
with a per-service environment label, but there was no way to list,
create, or delete them. Adds the management surface and the switcher:

- GET /projects/:id/environments with live service counts (sqlc)
- POST /projects/:id/environments — lowercase dns-label names, 1-50
  chars, unique per project (409 on dupe)
- DELETE /environments/:id — refuses while it holds services (409)
- Workspace service list gains env filter chips with counts plus an
  inline "+ env" creator
- CLI: containr environments list|create|delete (--yes on delete);
  MCP: containr_environments_list/create/delete (delete needs confirm)
- OpenAPI: new Environments tag + ProjectEnvironment schema

Live-verified: list counts, name validation, dupe 409, empty delete,
non-empty 409, CLI list.

Generated with [Devin](https://devin.ai)

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/backend/internal/api/environments.go

@@ -0,0 +1,140 @@
+package api
+
+// Project environments — the named lanes services deploy into
+// (production/development/preview are seeded; custom names allowed).
+
+import (
+	"context"
+	"net/http"
+	"regexp"
+	"strings"
+	"time"
+
+	"containr/internal/database"
+	"containr/internal/database/sqlcdb"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+)
+
+var envNamePattern = regexp.MustCompile(`^[a-z0-9]([a-z0-9-]{0,48}[a-z0-9])?$`)
+
+type environmentDTO struct {
+	ID           uuid.UUID `json:"id"`
+	Name         string    `json:"name"`
+	ProjectID    uuid.UUID `json:"project_id"`
+	CreatedAt    time.Time `json:"created_at"`
+	UpdatedAt    time.Time `json:"updated_at"`
+	ServiceCount int64     `json:"service_count"`
+}
+
+func toEnvironmentDTO(id uuid.UUID, name string, projectID uuid.UUID, created, updated time.Time, count int64) environmentDTO {
+	return environmentDTO{ID: id, Name: name, ProjectID: projectID, CreatedAt: created, UpdatedAt: updated, ServiceCount: count}
+}
+
+// handleListEnvironments returns the project's environments with live
+// service counts — the data behind the env switcher.
+func handleListEnvironments(c *gin.Context) {
+	db := c.MustGet("db").(*database.DB)
+	projectID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		respondError(c, http.StatusBadRequest, "VALIDATION", "Invalid project ID")
+		return
+	}
+	if exists, allowed := projectReadAccess(c, db, projectID); !exists || !allowed {
+		respondError(c, http.StatusNotFound, "NOT_FOUND", "Project not found")
+		return
+	}
+	rows, err := sqlcdb.New(db.DB).ListProjectEnvironments(context.Background(), projectID)
+	if err != nil {
+		respondError(c, http.StatusInternalServerError, "INTERNAL_ERROR", "Failed to list environments")
+		return
+	}
+	envs := make([]environmentDTO, 0, len(rows))
+	for _, r := range rows {
+		envs = append(envs, toEnvironmentDTO(r.ID, r.Name, r.ProjectID, r.CreatedAt.Time, r.UpdatedAt.Time, r.ServiceCount))
+	}
+	c.JSON(http.StatusOK, gin.H{"environments": envs})
+}
+
+// handleCreateEnvironment adds a named environment lane to the project.
+func handleCreateEnvironment(c *gin.Context) {
+	db := c.MustGet("db").(*database.DB)
+	projectID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		respondError(c, http.StatusBadRequest, "VALIDATION", "Invalid project ID")
+		return
+	}
+	userID, exists := c.Get("user_id")
+	if !exists || !ownsProject(db, projectID, userID.(string), contextIsAdmin(c)) {
+		respondError(c, http.StatusForbidden, "FORBIDDEN", "Access denied")
+		return
+	}
+	var req struct {
+		Name string `json:"name" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		respondError(c, http.StatusBadRequest, "VALIDATION", "name is required")
+		return
+	}
+	name := strings.ToLower(strings.TrimSpace(req.Name))
+	if !envNamePattern.MatchString(name) {
+		respondError(c, http.StatusBadRequest, "VALIDATION", "Name must be lowercase alphanumeric with dashes, 1-50 chars")
+		return
+	}
+	q := sqlcdb.New(db.DB)
+	if _, err := q.GetProjectEnvironmentByName(context.Background(), sqlcdb.GetProjectEnvironmentByNameParams{
+		ProjectID: projectID, Name: name,
+	}); err == nil {
+		respondError(c, http.StatusConflict, "CONFLICT", "Environment already exists")
+		return
+	}
+	if err := q.InsertProjectEnvironment(context.Background(), sqlcdb.InsertProjectEnvironmentParams{
+		Name: name, ProjectID: projectID,
+	}); err != nil {
+		respondError(c, http.StatusInternalServerError, "INTERNAL_ERROR", "Failed to create environment")
+		return
+	}
+	env, _ := q.GetProjectEnvironmentByName(context.Background(), sqlcdb.GetProjectEnvironmentByNameParams{
+		ProjectID: projectID, Name: name,
+	})
+	LogAuditWithRequest(c, "project", projectID.String(), "environment.create", map[string]interface{}{"name": name})
+	c.JSON(http.StatusCreated, gin.H{"environment": toEnvironmentDTO(env.ID, env.Name, env.ProjectID, env.CreatedAt.Time, env.UpdatedAt.Time, 0)})
+}
+
+// handleDeleteEnvironment removes an environment that holds no services.
+func handleDeleteEnvironment(c *gin.Context) {
+	db := c.MustGet("db").(*database.DB)
+	envID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		respondError(c, http.StatusBadRequest, "VALIDATION", "Invalid environment ID")
+		return
+	}
+	userID, exists := c.Get("user_id")
+	if !exists {
+		respondError(c, http.StatusUnauthorized, "UNAUTHORIZED", "User not authenticated")
+		return
+	}
+	var projectID uuid.UUID
+	if err := db.QueryRow(`SELECT project_id FROM environments WHERE id = $1`, envID).Scan(&projectID); err != nil {
+		respondError(c, http.StatusNotFound, "NOT_FOUND", "Environment not found")
+		return
+	}
+	if !ownsProject(db, projectID, userID.(string), contextIsAdmin(c)) {
+		respondError(c, http.StatusForbidden, "FORBIDDEN", "Access denied")
+		return
+	}
+	q := sqlcdb.New(db.DB)
+	if n, err := q.CountEnvironmentServices(context.Background(), envID); err == nil && n > 0 {
+		respondError(c, http.StatusConflict, "CONFLICT", "Environment still contains services — move them first")
+		return
+	}
+	if err := q.DeleteProjectEnvironment(context.Background(), sqlcdb.DeleteProjectEnvironmentParams{
+		ID: envID, ProjectID: projectID,
+	}); err != nil {
+		respondError(c, http.StatusInternalServerError, "INTERNAL_ERROR", "Failed to delete environment")
+		return
+	}
+	LogAuditWithRequest(c, "project", projectID.String(), "environment.delete", map[string]interface{}{"environment_id": envID.String()})
+	c.JSON(http.StatusOK, gin.H{"message": "Environment deleted"})
+}

app/backend/internal/api/routes.go

@@ -307,6 +307,7 @@ func SetupRoutes(router *gin.Engine, db *database.DB, redis *database.Redis, cfg
 			read.GET("/projects", handleGetProjects)
 			read.GET("/projects/:id", handleGetProject)
 			read.GET("/projects/:id/services", handleGetServices)
+			read.GET("/projects/:id/environments", handleListEnvironments)
 			read.GET("/projects/:id/preview-environments", handleGetPreviewEnvironments)
 			read.GET("/projects/:id/security/history", securityHandler.GetProjectSecurityHistory)
 			read.GET("/projects/:id/vulnerabilities", securityHandler.GetVulnerabilities)
@@ -476,6 +477,8 @@ func SetupRoutes(router *gin.Engine, db *database.DB, redis *database.Redis, cfg
 			authed.POST("/databases/:id/backups/import", databaseHandler.ImportBackup)
 			authed.GET("/databases/:id/backups/:bid/download", databaseHandler.DownloadBackup)
 
+			authed.POST("/projects/:id/environments", handleCreateEnvironment)
+			authed.DELETE("/environments/:id", handleDeleteEnvironment)
 			authed.POST("/projects/:id/preview-environments", handleCreatePreviewEnvironment)
 			authed.PUT("/preview-environments/:id", handleUpdatePreviewEnvironment)
 			authed.DELETE("/preview-environments/:id", handleDeletePreviewEnvironment)