feat: add mcpctl mcp STDIO bridge, rework config claude

- New `mcpctl mcp -p PROJECT` command: STDIO-to-StreamableHTTP bridge
  that reads JSON-RPC from stdin and forwards to mcplocal project endpoint
- Rework `config claude` to write mcpctl mcp entry instead of fetching
  server configs from API (no secrets in .mcp.json)
- Keep `config claude-generate` as backward-compat alias
- Fix discovery.ts auth token not being forwarded to mcpd (RBAC bypass)
- Update fish/bash completions for new commands
- 10 new MCP bridge tests, updated claude tests, fixed project-discovery test

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

src/cli/src/index.ts

@@ -13,6 +13,7 @@ import { createEditCommand } from './commands/edit.js';
 import { createBackupCommand, createRestoreCommand } from './commands/backup.js';
 import { createLoginCommand, createLogoutCommand } from './commands/auth.js';
 import { createAttachServerCommand, createDetachServerCommand } from './commands/project-ops.js';
+import { createMcpCommand } from './commands/mcp.js';
 import { ApiClient, ApiError } from './api-client.js';
 import { loadConfig } from './config/index.js';
 import { loadCredentials } from './auth/index.js';
@@ -150,6 +151,9 @@ export function createProgram(): Command {
   };
   program.addCommand(createAttachServerCommand(projectOpsDeps), { hidden: true });
   program.addCommand(createDetachServerCommand(projectOpsDeps), { hidden: true });
+  program.addCommand(createMcpCommand({
+    getProject: () => program.opts().project as string | undefined,
+  }), { hidden: true });
 
   return program;
 }