feat: complete Plainleaf Chinese branding

Replace visible SilverBullet branding, localize the primary login and editor surfaces, and seed new spaces with a Chinese home page while preserving Markdown file names and command IDs.

Co-Authored-By: Codex <noreply@anthropic.com>

bin/silverbullet/space_template/index.md

@@ -1,24 +1,20 @@
-Hello 👋!
+# 首页
 
-Welcome to the wondrous world of SilverBullet. A world that once you discover and appreciate, you’ll never want to leave.
+欢迎使用 Plainleaf。这是一个基于原生 Markdown 文件的个人知识空间，你可以直接修改或删除本页内容。
 
-_One of us!_
+## 最近的随手记
 
-If you’re confused and don’t know what to do, have a look at the [Manual](https://silverbullet.md/Manual), or perhaps more specifically, the [Getting Started](https://silverbullet.md/Getting%20Started) page. Got questions? Head over to [the community forums](https://community.silverbullet.md/).
-
-This page serves purely as a starting point to not start with a blank slate. Feel free to ditch it completely or adjust it to your needs. This space is fully yours. Own it.
-
-# Recent quick notes
-${widgets.commandButton("Create quick note", "Quick Note")}
+${widgets.commandButton("新建随手记", "Quick Note")}
 
 ${some(query[[
   from p = index.subPages("Inbox")
   order by p.lastModified desc
   limit 10 select templates.fullPageItem(p)
-]]) or "_No quick notes yet!_"}
+]]) or "_还没有随手记_"}
 
-# Recent journal entries
-${widgets.commandButton("Today's entry", "Journal: Today")}
+## 最近日记
+
+${widgets.commandButton("今天的日记", "Journal: Today")}
 
 ${some(query[[
   from j = index.pages(config.get("journal.tag"))
@@ -26,21 +22,23 @@ ${some(query[[
   order by j.date desc
   limit 14
   select templates.pageItem(j)
-]]) or "_No journal entries yet!_"}
+]]) or "_还没有日记_"}
+
+## 待办事项
 
-# Recent incomplete tasks
 ${some(query[[
   from t = index.tasks()
   where not t.done
   order by t.pageLastModified
   desc limit 10
   select templates.taskItem(t)
-]]) or "_All tasks done!_"}
+]]) or "_待办事项已全部完成_"}
+
+## 最近修改
 
-# Recently modified pages
 ${query[[
   from p = index.contentPages()
   order by p.lastModified desc
   limit 10
-  select templates.fullPageItem(p) 
+  select templates.fullPageItem(p)
 ]]}

bin/silverbullet/tests/smoke.rs

@@ -70,7 +70,7 @@ async fn boots_and_serves_ping_config_and_bundle() {
     assert_eq!(index.status(), reqwest::StatusCode::OK);
     let index_body = index.text().await.unwrap();
     assert!(
-        index_body.contains("Welcome to the wondrous world of SilverBullet"),
+        index_body.contains("欢迎使用 Plainleaf"),
         "got: {index_body}"
     );