chore(opencode): swap glm-5.2:cloud → MiniMax-M2.7

headroom-hub 8789 was repointed to api.minimax.io/anthropic.
glm-5.2:cloud is no longer a registered model there.

Co-Authored-By: Claude <noreply@anthropic.com>

opencode.json

@@ -1,19 +1,19 @@
 {
   "$schema": "https://opencode.ai/config.json",
   "default_agent": "pragent",
-  "model": "headroom/glm-5.2:cloud",
-  "small_model": "headroom/glm-5.2:cloud",
+  "model": "headroom/MiniMax-M2.7",
+  "small_model": "headroom/MiniMax-M2.7",
   "provider": {
     "headroom": {
       "npm": "@ai-sdk/anthropic",
-      "name": "Headroom GLM",
+      "name": "Headroom (MiniMax passthrough)",
       "options": {
         "baseURL": "http://model-proxy.internal:8789/v1",
         "apiKey": "ollama"
       },
       "models": {
-        "glm-5.2:cloud": {
-          "name": "GLM 5.2 Cloud",
+        "MiniMax-M2.7": {
+          "name": "MiniMax M2.7",
           "limit": {
             "context": 200000,
             "output": 16000