feat(tree): checkpoint resource lifecycle work

提交当前顶层 mnote Git 工作区，范围集中在 04-tree-domain 的 resource/trash/filetree 生命周期、mnote-web resource_trash 路由、Convex/Next 兼容接口、sidebar/file-tree 客户端适配、smoke 脚本与对应设计/bug 记录。

不包含被 ignore 的 design/05-editor-mainline/reference-code/leptos-tiptap 嵌套仓库改动。新增 smoke 的测试密码改为运行时读取 MNOTE_E2E_PASSWORD，避免提交明文 credential assignment。

rust/crates/mnote-web/src/workspace_shell.rs

@@ -412,9 +412,8 @@ mod tests {
 
         assert!(degraded_projection.degraded);
         assert!(degraded_html.contains("data-mnote-workspace-shell-degraded=\"true\""));
-        assert!(degraded_html.contains(
-            "data-mnote-workspace-shell-degraded-reason=\"projection_unavailable\""
-        ));
+        assert!(degraded_html
+            .contains("data-mnote-workspace-shell-degraded-reason=\"projection_unavailable\""));
 
         let dev_dataset = json!({
             "workspaces": [{ "id": "ws_demo", "name": "开发用户 的工作区" }],
@@ -486,9 +485,18 @@ pub fn render_workspace_shell_sidebar_html(
         .bottom_entries
         .iter()
         .map(|entry| {
+            let extra_attrs = if entry.id == "trash" {
+                format!(
+                    r#" data-testid="mnote-sidebar-trash-entry" data-mnote-action="open-trash-modal" data-workspace-id="{}""#,
+                    escape_html(&projection.workspace_id),
+                )
+            } else {
+                String::new()
+            };
             format!(
-                r#"<a href="{}" class="wolai-footer-entry">{}{}</a>"#,
+                r#"<a href="{}" class="wolai-footer-entry"{}>{}{}</a>"#,
                 escape_html(&entry.href),
+                extra_attrs,
                 render_symbol(&entry.icon, "wolai-footer-icon"),
                 escape_html(&entry.label),
             )
@@ -500,7 +508,12 @@ pub fn render_workspace_shell_sidebar_html(
         degraded_marker = if projection.degraded {
             format!(
                 r#"<span hidden data-mnote-workspace-shell-degraded="true" data-mnote-workspace-shell-degraded-reason="{}"></span>"#,
-                escape_html(projection.degraded_reason.as_deref().unwrap_or("projection_unavailable")),
+                escape_html(
+                    projection
+                        .degraded_reason
+                        .as_deref()
+                        .unwrap_or("projection_unavailable")
+                ),
             )
         } else {
             String::new()