feat: add Z AI provider and glm model support

- Add Z AI provider configuration to ProviderMap
- Include BaseURL for Z AI API endpoint
- Add test case for Z AI provider existence
- Add glm to OpenAI model prefixes list
- Reorder gpt-5 in model prefixes list
- Support new Z AI provider in OpenAI compatible plugins

internal/plugins/ai/openai/openai.go

@@ -172,10 +172,11 @@ func (o *Client) supportsResponsesAPI() bool {
 
 func (o *Client) NeedsRawMode(modelName string) bool {
 	openaiModelsPrefixes := []string{
+		"glm",
+		"gpt-5",
 		"o1",
 		"o3",
 		"o4",
-		"gpt-5",
 	}
 	openAIModelsNeedingRaw := []string{
 		"gpt-4o-mini-search-preview",

internal/plugins/ai/openai_compatible/providers_config.go

@@ -123,6 +123,11 @@ var ProviderMap = map[string]ProviderConfig{
 		BaseURL:             "https://api.venice.ai/api/v1",
 		ImplementsResponses: false,
 	},
+	"Z AI": {
+		Name:                "Z AI",
+		BaseURL:             "https://api.z.ai/api/paas/v4",
+		ImplementsResponses: false,
+	},
 }
 
 // GetProviderByName returns the provider configuration for a given name with O(1) lookup

internal/plugins/ai/openai_compatible/providers_config_test.go

@@ -20,6 +20,11 @@ func TestCreateClient(t *testing.T) {
 			provider: "Groq",
 			exists:   true,
 		},
+		{
+			name:     "Existing provider - Z AI",
+			provider: "Z AI",
+			exists:   true,
+		},
 		{
 			name:     "Non-existent provider",
 			provider: "NonExistent",