修复 Gemini 兼容路由启动失败

apps/api/internal/httpapi/gemini_compat_test.go

@@ -2,6 +2,65 @@ package httpapi
 
 import "testing"
 
+func TestGeminiGenerateContentModelFromPath(t *testing.T) {
+	tests := []struct {
+		name        string
+		prefix      string
+		requestPath string
+		wantModel   string
+		wantOK      bool
+	}{
+		{
+			name:        "v1beta model",
+			prefix:      "/v1beta/models/",
+			requestPath: "/v1beta/models/gemini-2.5-flash:generateContent",
+			wantModel:   "gemini-2.5-flash",
+			wantOK:      true,
+		},
+		{
+			name:        "v1 model",
+			prefix:      "/v1/models/",
+			requestPath: "/v1/models/gemini-compatible:generateContent",
+			wantModel:   "gemini-compatible",
+			wantOK:      true,
+		},
+		{
+			name:        "bare model path",
+			prefix:      "/models/",
+			requestPath: "/models/gemini-image:generateContent",
+			wantModel:   "gemini-image",
+			wantOK:      true,
+		},
+		{
+			name:        "wrong suffix",
+			prefix:      "/v1beta/models/",
+			requestPath: "/v1beta/models/gemini-2.5-flash:countTokens",
+			wantOK:      false,
+		},
+		{
+			name:        "missing model",
+			prefix:      "/v1beta/models/",
+			requestPath: "/v1beta/models/:generateContent",
+			wantOK:      false,
+		},
+		{
+			name:        "extra path segment",
+			prefix:      "/v1beta/models/",
+			requestPath: "/v1beta/models/group/gemini-2.5-flash:generateContent",
+			wantOK:      false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotModel, gotOK := geminiGenerateContentModelFromPath(tt.prefix, tt.requestPath)
+			if gotOK != tt.wantOK || gotModel != tt.wantModel {
+				t.Fatalf("geminiGenerateContentModelFromPath() = %q, %v; want %q, %v", gotModel, gotOK, tt.wantModel, tt.wantOK)
+			}
+		})
+	}
+}
+
 func TestGeminiImageTaskBodyMapsTextOnlyToImageGenerate(t *testing.T) {
 	mapping, err := geminiImageTaskBody("gemini-image", map[string]any{
 		"contents": []any{