refactor(render): 解决国内可能存在的资源访问问题，新增大陆资源和海外资源可选项，允许用户根据服务器位置选择不同的资源策略，并且允许自定义资源镜像站

- Updated language attributes in HTML templates to dynamically set based on `t2i_font_source`.
- Replaced hardcoded Google Fonts links with dynamic links using `t2i_google_fonts_mirror` and `t2i_gstatic_mirror`.
- Adjusted font-family declarations to conditionally include 'Noto Sans SC' and 'Noto Sans TC' based on the `t2i_font_source`.
- Ensured consistent formatting and style across various templates including image, quote, topic, and user title items.
- Added missing newlines at the end of several files for consistency.

_conf_schema.json

@@ -215,6 +215,37 @@
                     "step": 5000
                 },
                 "hint": "回退尝试通常针对复杂页面，建议设置更长的超时时间（如 100000ms+）。"
+            },
+            "t2i_font_source": {
+                "type": "string",
+                "description": "t2i 渲染环境切换",
+                "options": ["Mainland", "Overseas"],
+                "default": "Overseas",
+                "hint": "切换环境会自动应用下方对应的镜像站地址、语言标识(zh-CN/zh-Hant)及字体优先级。"
+            },
+            "t2i_mainland_google_fonts": {
+                "type": "string",
+                "description": "[国内] Google Fonts 镜像",
+                "default": "https://fonts.loli.net",
+                "hint": "国内环境下推荐使用 loli.net 或其他可访问镜像。"
+            },
+            "t2i_mainland_gstatic": {
+                "type": "string",
+                "description": "[国内] Gstatic 镜像",
+                "default": "https://gstatic.loli.net",
+                "hint": "国内环境下推荐使用 loli.net 或其他可访问镜像。"
+            },
+            "t2i_overseas_google_fonts": {
+                "type": "string",
+                "description": "[国外] Google Fonts 官方",
+                "default": "https://fonts.googleapis.com",
+                "hint": "海外环境通常直接使用官方地址即可。"
+            },
+            "t2i_overseas_gstatic": {
+                "type": "string",
+                "description": "[国外] Gstatic 官方",
+                "default": "https://fonts.gstatic.com",
+                "hint": "海外环境通常直接使用官方地址即可。"
             }
         }
     },