diff --git a/.gitea/scripts/gui_version_creator.py b/.gitea/scripts/gui_version_creator.py
index b6aa2f6..85e8c1a 100644
--- a/.gitea/scripts/gui_version_creator.py
+++ b/.gitea/scripts/gui_version_creator.py
@@ -398,10 +398,10 @@ class DatabaseVersionManager:
                        f"+{stats['lines_added']}/-{stats['lines_deleted']} 行")
             
             # 6. 创建版本记录
-            # 生成下载地址（KS3对象存储 - 广州节点）
+            # 生成下载地址（KS3对象存储 - 广州节点，使用三级域名格式）
             installer_filename = f"ShuiDi_AI_Assistant_Setup_v{next_version}.exe"
-            download_url = f"https://ks3-cn-guangzhou.ksyuncs.com/shuidrop-chat-server/installers/{installer_filename}"
-            # 完整示例: https://ks3-cn-guangzhou.ksyuncs.com/shuidrop-chat-server/installers/ShuiDi_AI_Assistant_Setup_v1.5.0.exe
+            download_url = f"https://shuidrop-chat-server.ks3-cn-guangzhou.ksyuncs.com/installers/{installer_filename}"
+            # 完整示例: https://shuidrop-chat-server.ks3-cn-guangzhou.ksyuncs.com/installers/ShuiDi_AI_Assistant_Setup_v1.5.0.exe
             
             version_record = {
                 'version': next_version,
diff --git a/.gitea/scripts/upload_installer_to_ks3.py b/.gitea/scripts/upload_installer_to_ks3.py
index b08d0a6..8aa0b59 100644
--- a/.gitea/scripts/upload_installer_to_ks3.py
+++ b/.gitea/scripts/upload_installer_to_ks3.py
@@ -96,9 +96,10 @@ def upload_installer(connection, installer_path):
             policy='public-read'  # Set ACL policy
         )
         
-        # Generate download URL (using HTTPS)
+        # Generate download URL (using KS3 third-level domain format)
+        # Format: https://{bucket}.{endpoint}/{key}
         protocol = 'https' if KS3_IS_SECURE else 'http'
-        download_url = f"{protocol}://{KS3_ENDPOINT}/{KS3_BUCKET}/{ks3_key}"
+        download_url = f"{protocol}://{KS3_BUCKET}.{KS3_ENDPOINT}/{ks3_key}"
         
         logger.info(f"Upload successful!")
         logger.info(f"Download URL: {download_url}")
diff --git a/.gitea/workflows/gui-version-release.yml b/.gitea/workflows/gui-version-release.yml
index 4a90398..d132844 100644
--- a/.gitea/workflows/gui-version-release.yml
+++ b/.gitea/workflows/gui-version-release.yml
@@ -140,19 +140,32 @@ jobs:
         Write-Host "Step 4.5: Build production executable";
         Write-Host "==========================================";
         
-        # Ensure PyInstaller and Pillow are in the same Python environment
-        Write-Host "Installing dependencies...";
-        python -m pip install --upgrade pip --quiet;
-        python -m pip install pyinstaller --upgrade --quiet;
-        python -m pip install Pillow --quiet;
+        # Check and install dependencies only if needed
+        Write-Host "Checking dependencies...";
         
-        # Verify installation
-        Write-Host "Python version:";
-        python --version;
-        Write-Host "PyInstaller version:";
-        python -m PyInstaller --version;
-        Write-Host "Pillow version:";
-        python -c "from PIL import Image; print(Image.__version__)";
+        # Check PyInstaller
+        $pyinstallerInstalled = python -c "try: import PyInstaller; print('installed')`nexcept: print('not-installed')" 2>$null;
+        if ($pyinstallerInstalled -ne "installed") {
+          Write-Host "Installing PyInstaller...";
+          python -m pip install pyinstaller --quiet;
+        } else {
+          Write-Host "PyInstaller: already installed";
+        }
+        
+        # Check Pillow
+        $pillowInstalled = python -c "try: from PIL import Image; print('installed')`nexcept: print('not-installed')" 2>$null;
+        if ($pillowInstalled -ne "installed") {
+          Write-Host "Installing Pillow...";
+          python -m pip install Pillow --quiet;
+        } else {
+          Write-Host "Pillow: already installed";
+        }
+        
+        Write-Host "";
+        Write-Host "Environment ready:";
+        Write-Host "  Python:" (python --version);
+        Write-Host "  PyInstaller:" (python -m PyInstaller --version);
+        Write-Host "  Pillow:" (python -c "from PIL import Image; print(Image.__version__)");
         Write-Host "";
         
         python build_production.py;
diff --git a/config.py b/config.py
index 29daa7c..13bfdb0 100644
--- a/config.py
+++ b/config.py
@@ -42,7 +42,7 @@ VERSION = "1.0"
 WINDOW_TITLE = "AI回复连接入口-V1.0"
 
 # 应用版本号（用于版本检查）
-APP_VERSION = "1.5.11"
+APP_VERSION = "1.5.12"
 
 # 平台特定配置
 PLATFORMS = {
diff --git a/installer/build_installer.py b/installer/build_installer.py
index d95d29a..9ff42cb 100644
--- a/installer/build_installer.py
+++ b/installer/build_installer.py
@@ -146,8 +146,10 @@ class NSISInstaller:
         """生成NSIS安装脚本"""
         print("Generating NSIS installer script...")
         
-        # 标准化安装包命名（不带时间戳，便于固定下载地址）
-        installer_name = f"{self.app_name_en}_Setup_v{self.app_version}.exe"
+        # 标准化安装包命名（不带时间戳和空格，便于固定下载地址）
+        # 将应用名称中的空格替换为下划线
+        app_name_safe = self.app_name_en.replace(' ', '_')
+        installer_name = f"{app_name_safe}_Setup_v{self.app_version}.exe"
         # 示例: ShuiDi_AI_Assistant_Setup_v1.4.12.exe
         
         print(f"Installer name: {installer_name}")
diff --git a/version_history.json b/version_history.json
index c39e3ed..c2d006e 100644
--- a/version_history.json
+++ b/version_history.json
@@ -1,4 +1,20 @@
 [
+  {
+    "version": "1.5.12",
+    "update_type": "patch",
+    "content": "[patch] 修正ks3问题",
+    "author": "Gitea Actions Bot",
+    "commit_hash": "5c73bbf8bce718195e1d4b4f727ede53a3921c1a",
+    "commit_short_hash": "5c73bbf8",
+    "branch": "develop",
+    "release_time": "2025-10-11 16:54:44",
+    "download_url": "https://ks3-cn-guangzhou.ksyuncs.com/shuidrop-chat-server/installers/ShuiDi_AI_Assistant_Setup_v1.5.12.exe",
+    "stats": {
+      "files_changed": 3,
+      "lines_added": 29,
+      "lines_deleted": 13
+    }
+  },
   {
     "version": "1.5.11",
     "update_type": "patch",