feat: add workspace templates and tab visibility

docs/PLUGIN_RUNTIME.md

@@ -872,8 +872,8 @@ Workspace existence/list хранится только в filesystem:
 `.verstak` может хранить только metadata, которая не заменяет filesystem:
 
 - UI state: selected workspace, expanded folders, sort/pin state, preferences.
-- Semantic snapshot: applied template snapshot, enabled feature areas, folder
-  conventions.
+- Semantic snapshot: applied template snapshot, enabled feature areas, exact
+  `workspaceTools`, and folder conventions.
 
 Template snapshot копируется в metadata при создании workspace. Workspace
 identity при этом остаётся именем top-level folder; `metadata.workspaceName`
@@ -885,22 +885,39 @@ identity при этом остаётся именем top-level folder; `metada
 {
   "workspaceName": "Project",
   "createdFromTemplate": {
-    "templateId": "client-project",
-    "templateName": "Client Project",
+    "templateId": "project",
+    "templateName": "Project",
     "templateVersion": 1,
-    "appliedAt": "2026-06-19T12:00:00Z"
+    "appliedAt": "2026-06-19T12:00:00Z",
+    "workspaceTools": [
+      "verstak.notes",
+      "verstak.files",
+      "verstak.todo",
+      "verstak.journal",
+      "verstak.activity",
+      "verstak.browser-inbox"
+    ]
   },
   "features": {
     "notes": true,
     "files": true,
-    "secrets": true,
-    "activity": false
+    "todo": true,
+    "journal": true,
+    "activity": true,
+    "browser-inbox": true
   },
   "folders": {
     "notes": "Notes",
-    "files": "Files",
-    "secrets": "Secrets"
-  }
+    "files": "Files"
+  },
+  "workspaceTools": [
+    "verstak.notes",
+    "verstak.files",
+    "verstak.todo",
+    "verstak.journal",
+    "verstak.activity",
+    "verstak.browser-inbox"
+  ]
 }
 ```
 
@@ -912,6 +929,8 @@ update/migration может быть только явной future feature. Е
 ### API
 
 - `ListWorkspaces()` — список top-level physical folders.
+- `ListWorkspaceTemplates()` — selectable built-in templates с presentation
+  metadata и `workspaceTools`.
 - `CreateWorkspace(name, templateId?)` — создать `<vault>/<name>/`, применить
   template один раз, сохранить snapshot metadata.
 - `RenameWorkspace(oldName, newName)` — физически переименовать top-level folder

docs/WORKSPACE_TEMPLATES.md

@@ -0,0 +1,40 @@
+# Workspace Templates
+
+Workspace templates choose which dynamic plugin workspace tabs are visible when a
+new top-level workspace is created. They do not enable or disable plugins for the
+whole vault and do not affect global sidebar tools.
+
+## Built-in templates
+
+| Template | Workspace tabs |
+| --- | --- |
+| General | Notes, Files, Journal, Activity, Browser Inbox |
+| Project | Notes, Files, Todos, Journal, Activity, Browser Inbox |
+| Writing | Notes, Files, Journal |
+| Admin | Notes, Files, Secrets, Todos, Journal |
+| Minimal | Notes, Files |
+
+The create-workspace modal displays the selected template description and its
+included plugin tabs before the folder is created.
+
+## Metadata and compatibility
+
+Creation stores a template snapshot in `.verstak/workspaces/` metadata. The
+snapshot contains the template id, name, version, applied time, and an ordered
+`workspaceTools` list of plugin IDs. Existing workspace metadata without
+`workspaceTools` remains compatible: its workspace continues to show all globally
+enabled workspace plugins rather than unexpectedly hiding tabs.
+
+Templates are applied once. Editing the built-in catalog or creating another
+workspace with a different template never changes an existing workspace snapshot.
+There is no template editor or post-creation template switcher yet.
+
+## Global tools and unavailable plugins
+
+Template visibility applies only to `workspaceItems` in the selected workspace.
+Global views and sidebar items, such as global Todos, Browser Inbox, and Trash,
+remain available according to the normal plugin enablement state.
+
+The workspace host intersects the snapshot with dynamically discovered, globally
+enabled plugin contributions. If a template references a plugin that is missing or
+disabled, that tab is simply absent; the other template tabs remain usable.