analyze/upload vía /api/image-bytes + MCP HTTP (vscode) forzado a test

Imágenes:
- analyze_image y upload resuelven los bytes por el endpoint Python
  /api/image-bytes (pythonGetBinary). analyze_image enruta los dominios
  forge (env ACAI_FORGE_DOMAIN) al endpoint en vez de fetch directo (que
  daba ECONNREFUSED 127.0.0.1 dentro del container).

Aislamiento de entorno (vscode = solo test):
- resolveCurrentModeOverride(): sesión MCP HTTP (mcpSessionId presente) →
  "local"; stdio (chat/cron) → ACAI_MODE_OVERRIDE de entorno. Lo usan los
  builders de headers (pythonServerClient, files/helpers) → toda tool del
  MCP HTTP manda X-Acai-Mode: local.
- httpServer.resolveProjectCredentials fuerza forceMode:"local" al resolver
  project-info → la sesión obtiene web_url/api_web_url forge-local y opera
  siempre contra test, nunca producción.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mcp-server/tools/helpers/pythonServerClient.js

@@ -1,5 +1,5 @@
 import axios from "axios";
-import { resolveCurrentAcaiUser } from "./sessionHelpers.js";
+import { resolveCurrentAcaiUser, resolveCurrentModeOverride } from "./sessionHelpers.js";
 
 const PYTHON_BASE = `http://app:${process.env.ACAI_PORT || 9091}`;
 
@@ -11,7 +11,7 @@ const PYTHON_BASE = `http://app:${process.env.ACAI_PORT || 9091}`;
  */
 function buildPythonHeaders(extra = {}) {
     const authHeader = process.env.ACAI_AUTH_HEADER || "";
-    const mode = process.env.ACAI_MODE_OVERRIDE || process.env.ACAI_MODE || "";
+    const mode = resolveCurrentModeOverride();
     const role = process.env.ACAI_ROLE_OVERRIDE || "";
     const acaiUser = resolveCurrentAcaiUser();
 
@@ -43,3 +43,20 @@ export async function pythonGet(path, params = null, timeout = 30000) {
     });
     return response.data;
 }
+
+/**
+ * GET binario al server Python (p.ej. /api/image-bytes). Devuelve
+ * { buffer: Buffer, mimeType: string }. Lanza si el status no es 2xx.
+ */
+export async function pythonGetBinary(path, params = null, timeout = 30000) {
+    const response = await axios.get(`${PYTHON_BASE}${path}`, {
+        params: params || undefined,
+        headers: buildPythonHeaders(),
+        responseType: "arraybuffer",
+        timeout,
+        maxContentLength: Infinity,
+    });
+    const mimeType = (response.headers?.["content-type"] || "").split(";")[0].trim()
+        || "application/octet-stream";
+    return { buffer: Buffer.from(response.data), mimeType };
+}