refactor(cliproxy): plugin-based quota probes + GLM/xAI support

[INONONO66]

Summary

Refactor the monolithic src/cliproxy/quota.ts (477 lines) into a plugin registry pattern and add two new provider quota probes.

Changes

Structural refactoring

• Extract shared types (AuthFile, ProbeResult, ProbeWindow, ProbeFn) into quota/types.ts
• Extract shared helpers (normalizePercent, normalizeReset, fetchJson, etc.) into quota/helpers.ts
• Replace if/else dispatch with Map<string, ProbeFn> registry + registerProbe()
• Split probeClaude, probeCodex, probeKimi into individual files under quota/probes/

New providers

• GLM (probes/glm.ts): Probes api.z.ai/api/monitor/usage/quota/limit — parses TIME_LIMIT and TOKENS_LIMIT entries into standardized windows
• xAI (probes/xai.ts): Uses xAI Management API (management-api.x.ai) — combines prepaid balance + spending limits + invoice preview into monthly spend utilization

Adding a new provider (3 steps)

1. Create src/cliproxy/quota/probes/xxx.ts exporting a ProbeFn
2. Add registerProbe("xxx", probeXxx) in quota/index.ts
3. Add CLI login flag in login.ts (if OAuth-based)

File structure

src/cliproxy/quota/
├── index.ts          # Registry + refresh()
├── types.ts          # Shared types
├── helpers.ts        # Shared utils
└── probes/
    ├── claude.ts     # Anthropic OAuth usage
    ├── codex.ts      # ChatGPT wham/usage
    ├── kimi.ts       # Kimi coding usages
    ├── glm.ts        # z.ai quota/limit (new)
    └── xai.ts        # xAI Management API (new)

Verification

• bun run typecheck ✅
• bun test — 246 pass, 0 fail ✅
• bun run build ✅

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Summary by cubic

Refactored quota probing into a plugin registry and added GLM and xAI provider probes. This simplifies adding providers and enables xAI monthly spend visibility.

• Refactors

  • Replaced monolithic src/cliproxy/quota.ts with quota/ registry (registerProbe()), plus shared types.ts and helpers.ts.
  • Split probes into quota/probes/* and dispatch via Map<string, ProbeFn>.

• New Features

  • GLM probe (api.z.ai/api/monitor/usage/quota/limit) parsing TIME_LIMIT and TOKENS_LIMIT into standardized windows.
  • xAI probe using Management API to compute monthly spend utilization from invoice preview and limits; also surfaces prepaid balance.
  • Added glm CLI login flag in login.ts (-glm-login).

^{Written for commit a593290. Summary will update on new commits.}

Review in cubic

Summary by CodeRabbit

• New Features
  • Added support for GLM login provider.
  • Enhanced quota tracking for multiple AI providers including Claude, Codex, Kimi, GLM, and xAI.

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

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Run ID: 07126273-2e39-4149-801f-030bc51e093b

📥 Commits

Reviewing files that changed from the base of the PR and between 558ed99 and a593290.

📒 Files selected for processing (11)

• src/cliproxy/login.ts
• src/cliproxy/quota.ts
• src/cliproxy/quota/helpers.ts
• src/cliproxy/quota/index.ts
• src/cliproxy/quota/probes/claude.ts
• src/cliproxy/quota/probes/codex.ts
• src/cliproxy/quota/probes/glm.ts
• src/cliproxy/quota/probes/kimi.ts
• src/cliproxy/quota/probes/xai.ts
• src/cliproxy/quota/types.ts
• tests/unit/login.test.ts

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📝 Walkthrough

Walkthrough

This PR refactors the monolithic quota-probing module into a modular architecture with shared utilities, a provider registry, and five provider-specific implementations (Claude, Codex, GLM, Kimi, xAI). It also adds GLM as a supported login provider.

Changes

Quota Probing Refactor

Layer / File(s)	Summary
Quota Type Contracts and Shared Utilities src/cliproxy/quota/types.ts, src/cliproxy/quota/helpers.ts	Public type contracts define AuthFile, ProbeWindow, ProbeResult, and ProbeFn. Shared helpers normalize percentages and reset times, derive quota type labels from durations, fetch upstream JSON with timeout/abort, and extract error messages from unknown responses.
Quota Probe Registry and Orchestration src/cliproxy/quota/index.ts, src/cliproxy/quota.ts	Replaces the previous monolithic quota module with a registry-based architecture. readAuthFiles() discovers and parses auth JSON files. QuotaProbe.refresh() loads auths, selects a provider probe from the registry, executes probes with error handling, and aggregates results into quota snapshots and account reports.
Provider-Specific Quota Probes src/cliproxy/quota/probes/claude.ts, src/cliproxy/quota/probes/codex.ts, src/cliproxy/quota/probes/glm.ts, src/cliproxy/quota/probes/kimi.ts, src/cliproxy/quota/probes/xai.ts	Five provider implementations query provider-specific quota endpoints (Anthropic, OpenAI, GLM, Moonshot, xAI). Each validates auth fields, handles HTTP errors, parses provider-specific response schemas, normalizes usage percentages and reset times, and returns standardized ProbeWindow arrays.

GLM Login Provider Support

Layer / File(s)	Summary
GLM Login Configuration src/cliproxy/login.ts, tests/unit/login.test.ts	Registers GLM provider in login flags with -glm-login invocation and -no-browser flags, enabling startJob("glm", ...) to use GLM-specific authentication. Test expectations updated to include GLM.

🎯 3 (Moderate) | ⏱️ ~25 minutes

🐰 The quota probes now hop from provider to provider,
Each one a modular helper, each one much crisper!
With types and with tests, the refactor stands clear—
And GLM logs in without any fear! 🔐

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/quota-probes

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