feat(mcp): admin token CRUD HTTP handler (POST/GET/DELETE) + TokenService.List/GetByID

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

internal/app/app.go

@@ -272,6 +272,10 @@ func New(ctx context.Context, cfg *config.Config, dist embed.FS) (*App, error) {
 	}
 	mcpServer := mcp.NewMCPServer(mcpDeps)
 	mcp.MountTransports(r, mcpServer, mcpTokenSvc, mcpRateLimiter)
+	mcp.MountAdmin(r, mcp.AdminHandlerDeps{
+		Tokens: mcpTokenSvc,
+		Users:  userSvc,
+	})
 
 	// ===== ACP module wiring (Part 2: full SessionService + Supervisor) =====
 	acpRepo := acp.NewPostgresRepository(pool)