feat: add project workspaces (DB, API, service, and UI)

New project_workspaces table with primary workspace designation.
Full CRUD routes, service with auto-primary promotion on delete,
workspace management UI in project properties panel, and workspace
data included in project/issue ancestor responses.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/shared/src/types/project.ts

@@ -5,6 +5,20 @@ export interface ProjectGoalRef {
   title: string;
 }
 
+export interface ProjectWorkspace {
+  id: string;
+  companyId: string;
+  projectId: string;
+  name: string;
+  cwd: string;
+  repoUrl: string | null;
+  repoRef: string | null;
+  metadata: Record<string, unknown> | null;
+  isPrimary: boolean;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
 export interface Project {
   id: string;
   companyId: string;
@@ -18,6 +32,8 @@ export interface Project {
   leadAgentId: string | null;
   targetDate: string | null;
   color: string | null;
+  workspaces: ProjectWorkspace[];
+  primaryWorkspace: ProjectWorkspace | null;
   archivedAt: Date | null;
   createdAt: Date;
   updatedAt: Date;

packages/shared/src/validators/project.ts

@@ -19,3 +19,18 @@ export type CreateProject = z.infer<typeof createProjectSchema>;
 export const updateProjectSchema = createProjectSchema.partial();
 
 export type UpdateProject = z.infer<typeof updateProjectSchema>;
+
+export const createProjectWorkspaceSchema = z.object({
+  name: z.string().min(1),
+  cwd: z.string().min(1),
+  repoUrl: z.string().url().optional().nullable(),
+  repoRef: z.string().optional().nullable(),
+  metadata: z.record(z.unknown()).optional().nullable(),
+  isPrimary: z.boolean().optional().default(false),
+});
+
+export type CreateProjectWorkspace = z.infer<typeof createProjectWorkspaceSchema>;
+
+export const updateProjectWorkspaceSchema = createProjectWorkspaceSchema.partial();
+
+export type UpdateProjectWorkspace = z.infer<typeof updateProjectWorkspaceSchema>;