docs: make English the default docs language and fix link paths

docs/cli/memory-knowledge.mdx

@@ -1,63 +1,49 @@
 ---
-title: 记忆与知识库
-description: 记忆蒸馏和知识库管理命令
+title: Memory & Knowledge
+description: Memory distillation and knowledge base management commands
 ---
 
 ## memory
 
-管理 Agent 的长期记忆系统。
+Manage the Agent's long-term memory system.
 
 ### memory dream
 
-手动触发记忆蒸馏（Deep Dream），整理近期的天级记忆，蒸馏合并到 MEMORY.md，并生成梦境日记。
+Manually trigger memory distillation (Deep Dream) — consolidate recent daily memories into MEMORY.md and generate a dream diary.
 
 ```text
 /memory dream [N]
 ```
 
-- `N`：整理近 N 天的记忆，默认 3 天，最大 30 天
-- 蒸馏在后台异步执行，完成后会在对话中通知结果
-- 无需等待 Agent 初始化，首次对话前即可使用
+- `N`: Consolidate the last N days of memory (default 3, max 30)
+- Runs asynchronously in the background; you'll be notified in chat when complete
+- Works without Agent initialization — can be used before the first conversation
 
-**示例：**
+**Examples:**
 
 ```text
-/memory dream       # 整理近 3 天
-/memory dream 7     # 整理近 7 天
-/memory dream 30    # 整理近 30 天（全量）
+/memory dream       # Consolidate last 3 days
+/memory dream 7     # Consolidate last 7 days
+/memory dream 30    # Consolidate last 30 days (full)
 ```
 
-蒸馏完成后，Web 端会收到带有跳转链接的通知，可直接查看更新后的 MEMORY.md 和梦境日记。
+On the Web console, the completion notification includes clickable links to view the updated MEMORY.md and dream diary.
 
 <Tip>
-  系统每天 23:55 会自动执行一次蒸馏（lookback 1 天）。手动触发适用于首次部署后的历史整理，或需要立即更新记忆时使用。
+  The system automatically runs distillation daily at 23:55 (lookback 1 day). Manual trigger is useful for consolidating historical memories after first deployment, or when you need an immediate memory update.
 </Tip>
 
 ## knowledge
 
-查看和管理个人知识库。默认显示知识库统计信息。
+View and manage the personal knowledge base. Shows statistics by default.
 
 ```text
 /knowledge
 ```
 
-输出示例：
-
-```
-📚 知识库
-
-- 状态：已开启
-- 页面数：12
-- 总大小：45.2 KB
-- 分类明细：
-  - concepts/: 5 篇
-  - entities/: 4 篇
-  - sources/: 3 篇
-```
-
 ### knowledge list
 
-查看知识库目录树结构。
+View the knowledge base directory tree.
 
 ```text
 /knowledge list
@@ -65,7 +51,7 @@ description: 记忆蒸馏和知识库管理命令
 
 ### knowledge on / off
 
-开启或关闭知识库。关闭后不再注入知识提示词和索引知识文件。
+Enable or disable the knowledge base. When disabled, knowledge prompts and file indexing are not injected.
 
 ```text
 /knowledge on
@@ -73,5 +59,5 @@ description: 记忆蒸馏和知识库管理命令
 ```
 
 <Note>
-  终端 CLI 中 `cow knowledge` 和 `cow knowledge list` 可用，但 `on|off` 仅支持在对话中使用（需实时生效）。
+  In the terminal CLI, `cow knowledge` and `cow knowledge list` are available, but `on|off` is only supported in chat (requires runtime effect).
 </Note>