fix(opencode): cloak Responses requests that already have tools

Free-tier Zen models reject Responses requests with 403 FreeTierError
when client tools are present but the fingerprint quartet is missing.
Apply the fingerprint tools to every OpenCode request, canonicalise
case variants of the quartet (Bash->bash) without duplication, and
restore the caller's original spellings on the response side via a
request-local WeakMap threaded through the existing toolNameMap.

open-sse/handlers/chatCore/nonStreamingHandler.js

@@ -10,6 +10,7 @@ import { unwrapClineEnvelope } from "../../shared/clineEnvelope.js";
 import { buildRequestDetail, extractRequestConfig, extractUsageFromResponse, saveUsageStats, formatDoneLine } from "./requestDetail.js";
 import { appendRequestLog, saveRequestDetail } from "@/lib/usageDb.js";
 import { decloakToolNames } from "../../utils/claudeCloaking.js";
+import { restoreToolNames } from "../../utils/opencodeFingerprint.js";
 import { ROLE, RESPONSES_ITEM } from "../../translator/schema/index.js";
 
 function parseToolArguments(value) {
@@ -397,7 +398,7 @@ export async function handleNonStreamingResponse({ providerResponse, provider, m
 
   return {
     success: true,
-    response: new Response(JSON.stringify(translatedResponse), {
+    response: new Response(JSON.stringify(restoreToolNames(translatedResponse, toolNameMap)), {
       headers: { "Content-Type": "application/json", "Access-Control-Allow-Origin": "*" }
     })
   };