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/providers/registry/commandcode.js

@@ -23,9 +23,24 @@ export default {
     format: "commandcode",
     forceStream: true,
     headers: {
-      "x-command-code-version": "0.25.7",
+      "x-command-code-version": "1.10.0",
       "x-cli-environment": "cli",
+      "User-Agent": "cli",
     },
+    // Quota/billing endpoints (same alpha API the official CLI /usage calls).
+    // whoami resolves orgId; credits+subscription+usage/summary then report the
+    // 5-hour/weekly windows, plan, and period credits. See services/usage/commandcode.js.
+    usage: {
+      baseUrl: "https://api.commandcode.ai",
+      whoamiUrl: "/alpha/whoami",
+      creditsUrl: "/alpha/billing/credits",
+      subscriptionsUrl: "/alpha/billing/subscriptions",
+      summaryUrl: "/alpha/usage/summary",
+    },
+  },
+  features: {
+    usage: true,
+    usageApikey: true,
   },
   models: [
     { id: "deepseek/deepseek-v4-pro", name: "DeepSeek V4 Pro" },