[yanxijian]

Summary

Replace the bundled vsc-leetcode-cli with direct GraphQL/REST calls and modernize the extension for current VS Code. The CLI is effectively unmaintained and forces a Node.js dependency; this change removes it and talks to LeetCode directly, while keeping the upstream package identity and default endpoint (leetcode) for compatibility.

What changed

• Authentication: cookie-based login stored in VS Code SecretStorage, plus Web Authorization. Local multi-account sessions.
• Data layer: problem list (paged GraphQL, including LCP/interview IDs), statements, official/top solutions, tags, companies, favorites.
• Judge: sample/custom tests and submissions via the REST judge endpoints, with polling and formatted runtime/memory.
• CLI removal: delete leetCodeExecutor, cliSession, cpUtils, wslUtils; remove vsc-leetcode-cli, the Node.js requirement, leetcode.nodePath, and leetcode.useWsl.
• VS Code modernization: require VS Code 1.90, asWebviewUri + nonce CSP, remove legacy vscode-resource/enableCommandUris/retainContextWhenHidden, add viewsWelcome and a sign-in context key.
• Localization: English/Simplified Chinese manifest and runtime l10n resources.
• Engineering: esbuild bundle (dist/extension.js), ESLint, unit tests, Node 20 CI matrix, and smaller VSIX packaging.
• Docs: README and Chinese README updated for cookie login and the removed Node.js settings; CHANGELOG.md has an Unreleased entry.

Testing

• npm ci
• npm run typecheck
• npm run lint
• npm test — 6 unit tests (cookie parsing and problem-file generation)
• npm run package — VSIX builds and installs into an isolated extensions directory
• Development checks against a live leetcode.cn account covered the problem list, statements, solutions, test/submit, and favorites.

Compatibility notes

• The package name, publisher, version, and default endpoint remain unchanged; leetcode.cn is selected with Switch Endpoint.
• This is intentionally a large change. I am happy to split it into smaller PRs (for example, API layer first, then UI/localization) if that is easier to review.