feat(lora): add lora_syntax_format setting for syntax version toggle (#917)

Adds lora_syntax_format setting (full/legacy) that controls whether <lora:...> syntax uses relative paths (full) or filename only (legacy). Default is legacy for backward compatibility with A1111 convention. The full path format (<lora:relative/path/filename:strength>) enables lossless model resolution across subfolders.

Ultraworked with Sisyphus (https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

locales/zh-CN.json

@@ -577,7 +577,13 @@
         },
         "misc": {
             "includeTriggerWords": "复制 LoRA 语法时包含触发词",
-            "includeTriggerWordsHelp": "复制 LoRA 语法到剪贴板时包含训练触发词"
+            "includeTriggerWordsHelp": "复制 LoRA 语法到剪贴板时包含训练触发词",
+            "loraSyntaxFormat": "LoRA 语法格式",
+            "loraSyntaxFormatHelp": "LoRA 语法格式。完整路径（Full）包含子文件夹路径 (<lora:style/anime/x:1.0>)，解析精确无歧义。旧版（Legacy）仅使用文件名 (<lora:x:1.0>)——A1111 原始约定，同名文件跨文件夹时可能产生歧义。",
+            "loraSyntaxFormatOptions": {
+                "full": "完整路径（子文件夹/名称）",
+                "legacy": "旧版 A1111（仅名称）"
+            }
         },
         "metadataArchive": {
             "enableArchiveDb": "启用元数据归档数据库",