fix(hub): 按用户裁定统一三档模型链(首opencode-free/次节点绑定deepseek/末agnes-3.0); fallback_model移入config.local.json

tools/xaf_agent_hub/config.json

@@ -54,7 +54,10 @@
       "model_chain": [
         "opencode/deepseek-v4.1-flash-free",
         "axonhub/deepseek",
-        "agnes/agnes-3.0-flash"
+        [
+          "agnes/agnes-3.0-flash",
+          "agnes-ai/agnes-3.0-flash"
+        ]
       ],
       "concurrency_limit": 6,
       "branch_policy": "mainline"
@@ -72,7 +75,10 @@
       "model_chain": [
         "opencode/deepseek-v4.1-flash-free",
         "axonhub/deepseek",
-        "agnes-ai/agnes-3.0-flash"
+        [
+          "agnes-ai/agnes-3.0-flash",
+          "agnes/agnes-3.0-flash"
+        ]
       ]
     },
     {
@@ -87,7 +93,10 @@
       "model_chain": [
         "opencode/deepseek-v4.1-flash-free",
         "axonhub/deepseek",
-        "agnes/agnes-3.0-flash"
+        [
+          "agnes/agnes-3.0-flash",
+          "agnes-ai/agnes-3.0-flash"
+        ]
       ],
       "concurrency_limit": 4,
       "branch_policy": "mainline",
@@ -107,8 +116,11 @@
       "concurrency_limit": 4,
       "model_chain": [
         "opencode/deepseek-v4.1-flash-free",
-        "axonhub/deepseek",
-        "agnes/agnes-3.0-flash"
+        "axon/deepseek",
+        [
+          "agnes/agnes-3.0-flash",
+          "agnes-ai/agnes-3.0-flash"
+        ]
       ],
       "dir_aliases": {
         "/sc-data/cfc": "C:/code/cfc"
@@ -128,8 +140,11 @@
       "readonly_default": true,
       "model_chain": [
         "opencode/deepseek-v4.1-flash-free",
-        "etotem/deepseek",
-        "agnes/agnes-3.0-flash"
+        "axonhub/deepseek",
+        [
+          "axonhub/agnes-3.0-flash",
+          "axonhub/agnes-2.5-flash"
+        ]
       ],
       "concurrency_limit": 4,
       "auto_prod": true
@@ -146,8 +161,11 @@
       "default_directory": "/sc-data/cfc",
       "model_chain": [
         "opencode/deepseek-v4.1-flash-free",
-        "axonhub/deepseek",
-        "agnes/agnes-3.0-flash"
+        "etotem/deepseek",
+        [
+          "agnes/agnes-3.0-flash",
+          "agnes-ai/agnes-3.0-flash"
+        ]
       ],
       "concurrency_limit": 6
     }