fix(config): clarify keyboard shortcut labels (#7101)

Apply UI copy fixes for keyboard shortcut labels in en.json:
- Update wording for project backlog vs task backlog
- Swap GO_TO_SCHEDULE/GO_TO_SCHEDULED_VIEW labels so they match the
  routes they actually navigate to (Today vs Schedule)
- Replace "Toggle" with "Start/stop" for time tracking shortcuts
- Tidy task panel and task completion wording

Plus follow-ups from issue #7074:
- Make TOGGLE_DETAIL_PANEL tooltip match the new "task panel" wording
- Use singular form for COLLAPSE/EXPAND_SUB_TASKS
- Drop misleading "Press Enter to save" from KEYBOARD.HELP

Closes #7074
Co-authored-by: Symon Baikov <symonbaikov@users.noreply.github.com>

src/assets/i18n/en.json

@@ -1554,7 +1554,7 @@
         "SCHEDULE": "Schedule task",
         "SET_DEADLINE": "Set deadline",
         "TOGGLE_ATTACHMENTS": "Show/hide attachments",
-        "TOGGLE_DETAIL_PANEL": "Show/hide additional info",
+        "TOGGLE_DETAIL_PANEL": "Show/hide task panel",
         "TOGGLE_DONE": "Toggle completion status",
         "TOGGLE_SUB_TASK_VISIBILITY": "Toggle subtask visibility",
         "TOGGLE_TAGS": "Toggle tags",
@@ -2109,25 +2109,25 @@
       "ADD_NEW_PROJECT": "Add new project",
       "ADD_NEW_TASK": "Add new task",
       "APP_WIDE_SHORTCUTS": "Global Shortcuts (application-wide)",
-      "COLLAPSE_SUB_TASKS": "Collapse subtasks",
-      "EXPAND_SUB_TASKS": "Expand subtasks",
+      "COLLAPSE_SUB_TASKS": "Collapse subtask",
+      "EXPAND_SUB_TASKS": "Expand subtask",
       "GLOBAL_ADD_NOTE": "Add new note",
       "GLOBAL_ADD_TASK": "Add new task",
       "GLOBAL_SHOW_HIDE": "Show/hide Super Productivity",
-      "GLOBAL_TOGGLE_TASK_START": "Toggle time tracking for last active task",
+      "GLOBAL_TOGGLE_TASK_START": "Start/stop time tracking for last active task",
       "GO_TO_DAILY_AGENDA": "Go to agenda",
       "GO_TO_FOCUS_MODE": "Enter focus mode",
-      "GO_TO_SCHEDULE": "Go to Schedule",
-      "GO_TO_SCHEDULED_VIEW": "Go to scheduled tasks",
+      "GO_TO_SCHEDULE": "Go to Today",
+      "GO_TO_SCHEDULED_VIEW": "Go to Schedule",
       "GO_TO_SETTINGS": "Go to settings",
-      "GO_TO_WORK_VIEW": "Go to Work view and focus first task",
-      "HELP": "<p>Here you can configure all keyboard shortcuts.</p><p>Click on the text input and enter the desired keyboard key or key combination. Press <strong>Enter</strong> to save or <strong>Escape</strong> to abort.</p><p>There are three types of shortcuts:</p> <ul> <li> <strong>Global shortcuts:</strong> When the app is running it will trigger the action from every other application. </li> <li> <strong>Application level shortcuts:</strong> Will trigger from every screen of the application, but not if you're currently editing a text field. </li> <li> <strong>Task level shortcuts:</strong> They will only trigger if you have selected a task via mouse or keyboard and usually trigger an action specifically related to that one task.</li> </ul><p>Press <strong>Escape</strong> to remove a shortcut.",
+      "GO_TO_WORK_VIEW": "Go to task list and focus first task",
+      "HELP": "<p>Here you can configure all keyboard shortcuts.</p><p>Click on the text input and press the desired keyboard key or key combination. Press <strong>Escape</strong> to abort.</p><p>There are three types of shortcuts:</p> <ul> <li> <strong>Global shortcuts:</strong> When the app is running it will trigger the action from every other application. </li> <li> <strong>Application level shortcuts:</strong> Will trigger from every screen of the application, but not if you're currently editing a text field. </li> <li> <strong>Task level shortcuts:</strong> They will only trigger if you have selected a task via mouse or keyboard and usually trigger an action specifically related to that one task.</li> </ul><p>Press <strong>Escape</strong> to remove a shortcut.",
       "MOVE_TASK_DOWN": "Move task down in the list",
       "MOVE_TASK_TO_BOTTOM": "Move task to the bottom of the list",
       "MOVE_TASK_TO_TOP": "Move task to the top of the list",
       "MOVE_TASK_UP": "Move task up in the list",
-      "MOVE_TO_BACKLOG": "Move task to task backlog",
-      "MOVE_TO_REGULARS_TASKS": "Move task to Today's task list",
+      "MOVE_TO_BACKLOG": "Move task to project backlog",
+      "MOVE_TO_REGULARS_TASKS": "Move task to Today",
       "OPEN_PROJECT_NOTES": "Show/hide notes",
       "PLUGIN_SHORTCUTS": "Plugin Shortcuts",
       "SAVE_NOTE": "Save note",
@@ -2142,18 +2142,18 @@
       "TASK_EDIT_TITLE": "Edit title",
       "TASK_MOVE_TO_PROJECT": "Open move task to project menu",
       "TASK_OPEN_CONTEXT_MENU": "Open task context menu",
-      "TASK_OPEN_ESTIMATION_DIALOG": "Edit estimate / time spent",
+      "TASK_OPEN_ESTIMATION_DIALOG": "Edit estimate/time spent",
       "TASK_SCHEDULE": "Schedule task",
       "TASK_SHORTCUTS": "Tasks",
       "TASK_SHORTCUTS_INFO": "The following shortcuts apply to the currently selected task (selected via tab or mouse).",
-      "TASK_TOGGLE_DETAIL_PANEL_OPEN": "Show/hide additional task info",
+      "TASK_TOGGLE_DETAIL_PANEL_OPEN": "Show/hide task panel",
       "TASK_OPEN_NOTES_FULLSCREEN": "Open note/checklist in fullscreen",
-      "TASK_TOGGLE_DONE": "Toggle completed state",
+      "TASK_TOGGLE_DONE": "Toggle task completed status",
       "TASK_UNSCHEDULE": "Unschedule task",
       "TITLE": "Keyboard Shortcuts",
-      "TOGGLE_BACKLOG": "Show/hide task backlog",
+      "TOGGLE_BACKLOG": "Show/hide project backlog",
       "TOGGLE_ISSUE_PANEL": "Show/hide issue provider panel",
-      "TOGGLE_PLAY": "Start/stop task",
+      "TOGGLE_PLAY": "Start/stop time tracking for task",
       "TOGGLE_SIDE_NAV": "Focus sidenav",
       "TOGGLE_TASK_VIEW_CUSTOMIZER_PANEL": "Toggle filter/group/sort panel",
       "TRIGGER_SYNC": "Trigger sync (if configured)",