Fix openclaw config syntax - use external json file

- Move openclaw config to separate json file
- Reference file directly in podman module
- Remove problematic builtins.toJSON with nested arrays

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

modules/openclaw-config.json

@@ -0,0 +1,45 @@
+{
+  "gateway": {
+    "port": 18789,
+    "bind": "0.0.0.0",
+    "trustedProxies": ["::1", "127.0.0.1", "10.88.0.0/16", "10.89.0.0/16"],
+    "auth": {
+      "mode": "none"
+    },
+    "controlUi": {
+      "dangerouslyAllowHostHeaderOriginFallback": true,
+      "allowedOrigins": ["*"]
+    }
+  },
+  "channels": {
+    "discord": {
+      "enabled": true,
+      "groupPolicy": "open",
+      "dmPolicy": "open",
+      "allowFrom": ["*"]
+    }
+  },
+  "agents": {
+    "defaults": {
+      "model": {
+        "primary": "zai/glm-5"
+      }
+    }
+  },
+  "models": {
+    "providers": {
+      "zai": {
+        "baseUrl": "https://api.z.ai/api/coding/paas/v4",
+        "apiKey": "${ZAI_API_KEY}",
+        "api": "openai-completions",
+        "models": [
+          { "id": "glm-4.7", "name": "GLM 4.7", "contextWindow": 128000, "maxTokens": 131072 },
+          { "id": "glm-5", "name": "GLM 5", "contextWindow": 128000, "maxTokens": 131072 },
+          { "id": "glm-5-turbo", "name": "GLM 5 Turbo", "contextWindow": 128000, "maxTokens": 131072 },
+          { "id": "glm-4.5-air", "name": "GLM 4.5 Air", "contextWindow": 128000, "maxTokens": 131072 },
+          { "id": "glm-4.7-flash", "name": "GLM 4.7 Flash", "contextWindow": 128000, "maxTokens": 131072 }
+        ]
+      }
+    }
+  }
+}

modules/openclaw-podman.nix

@@ -47,7 +47,7 @@ in
         config.sops.templates."openclaw.env".path
       ];
       volumes = [
-        "${config.sops.templates."openclaw_config.json".path}:/root/.openclaw/config.json:ro"
+        "${./openclaw-config.json}:/root/.openclaw/config.json:ro"
         "openclaw-data:/root/.openclaw"
       ];
       extraOptions = [