fix(coding-plans): revert incorrect model name suffix and align MiniMax Token Plan labels

- Revert qwen3-max-2026-01-23 back to qwen3-max in dashscope-coding
- Update minimax-coding labels/descriptions to "Token Plan" to match
  actual config params (endpoints, quotas, billing), since MiniMax
  upgraded Coding Plan to Token Plan in March 2026

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compute/coding-plans/dashscope-coding.json

@@ -43,7 +43,7 @@
       "defaultTemperature": 0.7
     },
     {
-      "modelName": "qwen3-max-2026-01-23",
+      "modelName": "qwen3-max",
       "displayName": "Qwen3 Max (Coding)",
       "serviceType": [
         "chat"

compute/coding-plans/minimax-coding.json

@@ -99,7 +99,7 @@
       "serviceType": [
         "chat"
       ],
-      "description": "MiniMax Coding Plan，M2.5 模型，204.8K 上下文",
+      "description": "MiniMax Token Plan，M2.5 模型，204.8K 上下文",
       "contextWindow": 204800,
       "maxOutputTokens": 32768,
       "capabilities": [