fix(kb): Dataview FROM 改为 proposals（项目根）

Co-authored-by: Cursor <cursoragent@cursor.com>

kb/template/tpl-beat.md

@@ -47,7 +47,7 @@ tags: [beat]
 
 ```dataview
 TABLE author as "发起人", created as "日期", summary as "一句话"
-FROM "kb/proposals"
+FROM "proposals"
 WHERE contains(targets, this.file.link) AND status = "open"
 SORT created DESC
 ```

kb/template/tpl-character.md

@@ -102,7 +102,7 @@ related_worldbuilding: []
 
 ```dataview
 TABLE author as "发起人", created as "日期", summary as "一句话"
-FROM "kb/proposals"
+FROM "proposals"
 WHERE contains(targets, this.file.link) AND status = "open"
 SORT created DESC
 ```

kb/template/tpl-worldbuilding.md

@@ -90,7 +90,7 @@ related_worldbuilding: []
 
 ```dataview
 TABLE author as "发起人", created as "日期", summary as "一句话"
-FROM "kb/proposals"
+FROM "proposals"
 WHERE contains(targets, this.file.link) AND status = "open"
 SORT created DESC
 ```