[Bug] Plugin Marketplace: "Browse Plugins" and "+ Add plugin marketplace" buttons do not open

提交前确认 · Pre-submission checklist

• 我已搜索过现有 issue，确认这不是重复 / I searched existing issues and confirmed this isn't a duplicate.
• 我已阅读 CONTRIBUTING.md / I've read CONTRIBUTING.md.

问题类别 · Category

稳定性 / 崩溃 · Stability / Crash

涉及的 Agent 框架 · Agent framework

ZCode Agent（自研）

严重程度 · Severity

阻塞使用 · Blocking (无法使用核心功能 / core function unusable)

复现频率 · Reproducibility

必现 · Always

问题描述 · Description

In Plugin Marketplace > Plugins, neither the Browse Plugins action nor the + Add plugin marketplace action opens anything when clicked, preventing users from browsing available plugins or adding a new plugin marketplace.

Both the "Browse Plugins" and "+ Add plugin marketplace" controls in the Plugin Marketplace section are unresponsive and fail to open their respective dialogs/views.

Impact

Users are completely blocked from discovering or installing plugins through the marketplace, and cannot add alternative plugin marketplace sources. This effectively disables the plugin ecosystem functionality.

复现步骤 · Steps to reproduce

1. Go to Plugin Marketplace > Plugins.
2. Click Browse Plugins.
3. Observe nothing opens.
4. Click + Add plugin marketplace.
5. Observe nothing opens either.

期望表现 · Expected behavior

• Clicking Browse Plugins should open the plugin browsing interface.
• Clicking + Add plugin marketplace should open the dialog/flow for adding a new plugin marketplace source.

实际表现 · Actual behavior

• Neither action opens anything — clicking either button produces no visible response.

ZCode 版本 · ZCode version

v3.14.0

设备 / 系统 / 浏览器 · Device / OS / Browser

Windows 11 25H2

截图 / 录屏 / 日志 · Screenshots / Recordings / Logs

The issue names no source files, tests, or entry points. Start by locating the Plugin Marketplace > Plugins screen and the implementations of the Browse Plugins and + Add plugin marketplace controls; done means both controls open their expected browsing interface or marketplace-add flow, with regression coverage if the project provides frontend tests.