Merge origin/master (v0.5.81) into gitea/new_feature

Resolve conflicts:
- streamingHandler.js: merge buildStreamErrorBytes onAbortTerminal + local shouldPersistRequestDetail & streamStatusForContent
- capabilities.js: preserve server-injected user-asserted caps and models.dev catalog lookup; wire CommandCode /alpha/generate caps inside resolve()
- commandcode.js (services/usage): adopt upstream whoami + billing credits/subscriptions with 5h/weekly rate windows and plan caps
- openai-to-commandcode.js: merge toNativeImageBlock (data-URI & http(s) support) and assistant reasoning_content preservation
- commandcode-to-openai.js: adopt upstream mid-stream error throw for clean retry and abortion
- tests: sync commandcode test suite and exclude .next from vitest config

open-sse/services/usage.js

@@ -22,6 +22,7 @@ import { getZedUsage } from "./usage/zed.js";
 import { getXiaomiMimoUsage } from "./usage/xiaomi-mimo.js";
 import { resolveQoderCredentials } from "./qoderModels.js";
 import { getGlmUsage } from "./usage/glm.js";
+import { getCommandCodeUsage } from "./usage/commandcode.js";
 import {
   getIflowUsage,
   getOllamaUsage,
@@ -66,6 +67,7 @@ const USAGE_HANDLERS = {
   groq: (c) => getGroqUsage(c.apiKey, c.proxyOptions),
   zed: (c) => getZedUsage(c.accessToken, c.providerSpecificData, c.proxyOptions),
   "xiaomi-mimo": (c) => getXiaomiMimoUsage(c.accessToken, c.providerSpecificData, c.proxyOptions),
+  commandcode: (c) => getCommandCodeUsage(c.apiKey, c.proxyOptions),
 };
 
 export async function getUsageForProvider(connection, proxyOptions = null, options = {}) {