feat(commandcode): quota usage dashboard, CLI-parity request, and connect timeout fixes

- Add CommandCode usage handler mirroring the official CLI /usage
  (whoami → credits/subscriptions → summary) with 5h/weekly/monthly
  quota rows, registered in services/usage.js and registry config
- Parse commandcode quota rows in ProviderLimits (remainingPercentage + $ unit)
- Match official CLI request shape: x-command-code-version 1.10.0,
  User-Agent cli, and config.environment '${platform}-${arch}, Node.js ${version}'
- Fix connect timeout unit confusion: both profile and provider pages
  now use ms with a 1s minimum guard (prevents 60ms footgun)
- Fix fetchT0 ReferenceError in base.js error path and log fetch
  diagnostics only on upstream failure
- Quota Tracker defaults to the Active account filter
- Ignore .commandcode/ CLI local state

open-sse/services/usage.js

@@ -15,6 +15,7 @@ import { getXaiUsage } from "./usage/xai.js";
 import { getGrokCliUsage } from "./usage/grok-cli.js";
 import { getKimiUsage } from "./usage/kimi.js";
 import { getDeepseekUsage } from "./usage/deepseek.js";
+import { getCommandCodeUsage } from "./usage/commandcode.js";
 import {
   getQwenUsage,
   getIflowUsage,
@@ -51,6 +52,7 @@ const USAGE_HANDLERS = {
   "grok-cli": (c) => getGrokCliUsage(c.accessToken, c.providerSpecificData, c.proxyOptions),
   kimi: (c) => getKimiUsage(c.accessToken, c.apiKey, c.proxyOptions, c.providerSpecificData),
   deepseek: (c) => getDeepseekUsage(c.apiKey, c.proxyOptions),
+  commandcode: (c) => getCommandCodeUsage(c.apiKey, c.proxyOptions),
 };
 
 export async function getUsageForProvider(connection, proxyOptions = null) {