Examine source code of Z.ai Enhancer

{
  "manifest_version": 3,
  "name": "Z.ai Enhancer",
  "version": "0.14.2",
  "description": "Floating panel for chat.z.ai: sound + visual notifications when the agent finishes responding, auto-send queue, and a reusable prompt library with {{variables}}.",
  "browser_specific_settings": {
    "gecko": {
      "id": "zai-enhancer@vmarcelo.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "developer": {
    "name": "Vmarcelo",
    "url": "https://github.com/Vmarcelo49/z-ai-enhancer"
  },
  "homepage_url": "https://github.com/Vmarcelo49/z-ai-enhancer",
  "permissions": [
    "notifications",
    "storage"
  ],
  "host_permissions": [
    "https://chat.z.ai/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://chat.z.ai/*"
      ],
      "js": [
        "content/event-bus.js",
        "content/i18n.js",
        "content/send-utils.js",
        "content/sound.js",
        "content/toast.js",
        "content/stats.js",
        "content/prompts.js",
        "content/detectors.js",
        "content/autosend.js",
        "content/notes.js",
        "content/panel.js",
        "content/main.js",
        "content/capacity-common.js",
        "content/dialog-killer.js",
        "content/refresh-retry.js"
      ],
      "css": [
        "content/toast.css",
        "content/panel.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content/page-hook.js",
        "content/i18n.js"
      ],
      "matches": [
        "https://chat.z.ai/*"
      ]
    },
    {
      "resources": [
        "content/i18n.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "action": {
    "default_title": "Z.ai Enhancer — open in-page panel",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "commands": {
    "open-panel": {
      "suggested_key": {
        "default": "Ctrl+Shift+Z",
        "mac": "MacCtrl+Shift+Z"
      },
      "description": "Open the Z.ai Enhancer panel on the current chat.z.ai tab"
    },
    "toggle-sound": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description": "Toggle the completion sound on/off"
    },
    "trigger-stop": {
      "suggested_key": {
        "default": "Alt+Shift+X"
      },
      "description": "Click the agent Stop button (if visible)"
    }
  }
}