fix(usage): restore commandcode quota + timeout guards lost in master merge

The -X theirs merge of origin/master (v0.5.69) silently reverted five
branch-only hunks because upstream had no conflict-region counterpart
and simply won the three-way pick:

* services/usage.js: re-register the commandcode USAGE handler +
  import. Without it the dashboard Quota Tracker fell through to
  'Usage API not implemented for commandcode'. The handler module
  (services/usage/commandcode.js) and registry usage block survived;
  only the dispatch entry was dropped.
* ProviderLimits/utils.js: restore parseQuotaData 'commandcode' case
  (currency-credit rows need unit "$" + remainingPercentage
  forwarding, else $0.05 balances render as 0%).
* profile + providers/[id] pages: restore Math.max(1000, ...) connect
  timeout floors so a stray '60' is never interpreted as 60ms.
* .gitignore: re-add .commandcode/ CLI local state.

Verified: tests/unit/commandcode-usage.test.js (6) and
usage-dispatch.test.js (2, asserts every provider routes to a real
handler) pass standalone; full unit run 1742 pass / 107 fail vs
1738/111 before this fix (remaining failures pre-existing, unrelated).

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 { getOpenCodeGoUsage } from "./usage/opencode-go.js";
 import { getGroqUsage } from "./usage/groq.js";
 import { getZedUsage } from "./usage/zed.js";
@@ -60,6 +61,7 @@ const USAGE_HANDLERS = {
   kimi: (c) => getKimiUsage(c.accessToken, c.apiKey, c.proxyOptions, c.providerSpecificData),
   "opencode-go": (c) => getOpenCodeGoUsage(c.apiKey, c.proxyOptions),
   deepseek: (c) => getDeepseekUsage(c.apiKey, c.proxyOptions),
+  commandcode: (c) => getCommandCodeUsage(c.apiKey, c.proxyOptions),
   groq: (c) => getGroqUsage(c.apiKey, c.proxyOptions),
   zed: (c) => getZedUsage(c.accessToken, c.providerSpecificData, c.proxyOptions),
 };