feat: update prompt for playground (#694)

Author: fridayL

src/memos/templates/mos_prompts.py

@@ -121,6 +121,7 @@
 - Brackets MUST be English half-width square brackets `[]`, NEVER use Chinese full-width brackets `【】` or any other symbols.
 - **When a sentence draws on an assistant/other-party memory**, mark the role in the sentence (“The assistant suggests…”) and add the corresponding citation at the end per this rule; e.g., “The assistant suggests choosing a midi dress and visiting COS in Guomao. [1:abc123]”
 - For preferences, do not mention the source in the response, do not appear `[Explicit preference]`, `[Implicit preference]`, `(Explicit preference)` or `(Implicit preference)` in the response
+- In the thinking mode (think), also strictly use the citation format `[i:memId]`,`i` is the order in the "Memories" section below (starting at 1). `memId` is the given short memory ID. The same as the response format.
 
 # Current Date: {date}
 
@@ -157,6 +158,7 @@
 - **NEVER** mention internal mechanisms like "retrieved memories", "database", "AI views", "memory system", or similar technical terms in your responses to users
 - For preferences, do not mention the source in the response, do not appear `[Explicit preference]`, `[Implicit preference]`, `(Explicit preference)` or `(Implicit preference)` in the response
 - The last part of the response should not contain `(Note: ...)` or `(According to ...)` etc.
+- In the thinking mode (think), also strictly use the citation format `[i:memId]`,`i` is the order in the "Memories" section below (starting at 1). `memId` is the given short memory ID. The same as the response format.
 
 ## Key Principles
 - Reference only relevant memories to avoid information overload
@@ -228,6 +230,7 @@
 - 方括号必须是英文半角方括号`[]`，绝不使用中文全角括号`【】`或任何其他符号。
 - **当句子引用助手/其他方记忆时**，在句子中标注角色（"助手建议…"）并根据此规则在句尾添加相应引用；例如，"助手建议选择中长裙并访问国贸的COS。[1:abc123]"
 - 对于偏好，不要在回答中标注来源，不要出现`[显式偏好]`或`[隐式偏好]`或`(显式偏好)`或`(隐式偏好)`的字样
+- 在思考模式下(think),也需要严格采用引用格式`[i:memId]`,`i`是下面"记忆"部分中的顺序（从1开始）。`memId`是给定的短记忆ID。与回答要求一致
 
 # 当前日期：{date}
 
@@ -264,6 +267,7 @@
 - **绝不**在对用户的回复中提及内部机制，如"检索的记忆"、"数据库"、"AI观点"、"记忆系统"或类似技术术语
 - 对于偏好，不要在回答中标注来源，不要出现`[显式偏好]`或`[隐式偏好]`或`(显式偏好)`或`(隐式偏好)`的字样
 - 回复内容的结尾不要出现`(注: ...)`或`(根据...)`等解释
+- 在思考模式下(think),也需要严格采用引用格式`[i:memId]`,`i`是下面"记忆"部分中的顺序（从1开始）。`memId`是给定的短记忆ID。与回答要求一致
 
 ## 核心原则
 - 仅引用相关记忆以避免信息过载