feat: load plugin frontends at runtime and remove plugin ids from the shell

plugins/workspaces/locales/en.json

@@ -1 +1,55 @@
-{}
+{
+  "newUi": {
+    "sidebar": {
+      "workspaces": {
+        "title": "Workspaces",
+        "saveCurrent": "Save Current",
+        "saveCurrentTitle": "Save Current Workspace",
+        "saveCurrentDescription": "Save every open tab, split layout, and pane arrangement as a new named workspace.",
+        "nameLabel": "Name",
+        "namePlaceholder": "e.g., Prod Debugging",
+        "nameRequired": "Workspace name is required",
+        "colorLabel": "Color",
+        "workspaceCreated": "Workspace saved",
+        "workspaceUpdated": "Workspace updated",
+        "workspaceDeleted": "Workspace deleted",
+        "workspaceDuplicated": "Workspace duplicated",
+        "saveFailed": "Failed to save workspace",
+        "updateFailed": "Failed to update workspace",
+        "deleteFailed": "Failed to delete workspace",
+        "duplicateFailed": "Failed to duplicate workspace",
+        "loadFailed": "Failed to load workspaces",
+        "applyFailed": "Failed to apply workspace",
+        "deleteWorkspaceTitle": "Delete Workspace",
+        "deleteWorkspaceDescription": "Are you sure you want to delete \"{{name}}\"? This cannot be undone.",
+        "noWorkspaces": "No saved workspaces yet. Save your current tab arrangement to get started.",
+        "tabCount": "{{count}} tab",
+        "tabCount_other": "{{count}} tabs",
+        "apply": "Apply",
+        "applyConfirmTitle": "Apply Workspace",
+        "applyConfirmDescription": "Applying \"{{name}}\" will close your current tabs and replace them with this workspace's saved arrangement. Unsaved changes to your current layout will be lost.",
+        "applyConfirmButton": "Apply Workspace",
+        "updateWithCurrent": "Update with Current",
+        "updateWithCurrentConfirm": "Overwrite \"{{name}}\" with your current tab arrangement?",
+        "rename": "Rename",
+        "duplicate": "Duplicate",
+        "duplicateNameSuffix": "{{name}} (copy)",
+        "setDefault": "Set as Default",
+        "unsetDefault": "Remove as Default",
+        "defaultBadge": "Default",
+        "lastSession": "Last Session",
+        "lastSessionDescription": "Automatically updated with your most recent tab arrangement. Apply it to recover what you had open.",
+        "lastUsed": "Last used {{time}}",
+        "neverUsed": "Never applied",
+        "tabsSkipped": "Workspace applied — {{count}} tab(s) skipped (host no longer exists): {{names}}"
+      }
+    }
+  },
+  "nav": {
+    "workspaces": "Workspaces"
+  },
+  "onboarding": {
+    "workflow_workspaces": "Workspaces",
+    "workflow_workspaces_desc": "Save a set of open tabs and reopen the whole layout later."
+  }
+}