feat: Add remote sync for project clones

Fetch remote changes before agents start working so they build on
up-to-date code. Adds ProjectSyncManager with git fetch + ff-only
merge of defaultBranch, integrated into phase dispatch to sync
before branch creation.

- Schema: lastFetchedAt column on projects table (migration 0029)
- Events: project:synced, project:sync_failed
- Phase dispatch: sync all linked projects before creating branches
- tRPC: syncProject, syncAllProjects, getProjectSyncStatus
- CLI: cw project sync [name] --all, cw project status [name]
- Frontend: sync button + ahead/behind badge on projects settings

apps/server/trpc/routers/_helpers.ts

@@ -24,6 +24,7 @@ import type { CoordinationManager } from '../../coordination/types.js';
 import type { BranchManager } from '../../git/branch-manager.js';
 import type { ExecutionOrchestrator } from '../../execution/orchestrator.js';
 import type { PreviewManager } from '../../preview/index.js';
+import type { ProjectSyncManager } from '../../git/remote-sync.js';
 
 export function requireAgentManager(ctx: TRPCContext) {
   if (!ctx.agentManager) {
@@ -214,3 +215,13 @@ export function requireReviewCommentRepository(ctx: TRPCContext): ReviewCommentR
   }
   return ctx.reviewCommentRepository;
 }
+
+export function requireProjectSyncManager(ctx: TRPCContext): ProjectSyncManager {
+  if (!ctx.projectSyncManager) {
+    throw new TRPCError({
+      code: 'INTERNAL_SERVER_ERROR',
+      message: 'Project sync manager not available',
+    });
+  }
+  return ctx.projectSyncManager;
+}

apps/server/trpc/routers/project.ts

@@ -7,7 +7,7 @@ import { z } from 'zod';
 import { join } from 'node:path';
 import { rm } from 'node:fs/promises';
 import type { ProcedureBuilder } from '../trpc.js';
-import { requireProjectRepository } from './_helpers.js';
+import { requireProjectRepository, requireProjectSyncManager } from './_helpers.js';
 import { cloneProject } from '../../git/clone.js';
 import { getProjectCloneDir } from '../../git/project-clones.js';
 
@@ -153,5 +153,25 @@ export function projectProcedures(publicProcedure: ProcedureBuilder) {
         await repo.setInitiativeProjects(input.initiativeId, input.projectIds);
         return { success: true };
       }),
+
+    syncProject: publicProcedure
+      .input(z.object({ id: z.string().min(1) }))
+      .mutation(async ({ ctx, input }) => {
+        const syncManager = requireProjectSyncManager(ctx);
+        return syncManager.syncProject(input.id);
+      }),
+
+    syncAllProjects: publicProcedure
+      .mutation(async ({ ctx }) => {
+        const syncManager = requireProjectSyncManager(ctx);
+        return syncManager.syncAllProjects();
+      }),
+
+    getProjectSyncStatus: publicProcedure
+      .input(z.object({ id: z.string().min(1) }))
+      .query(async ({ ctx, input }) => {
+        const syncManager = requireProjectSyncManager(ctx);
+        return syncManager.getSyncStatus(input.id);
+      }),
   };
 }