feat: workspace aliases, tab groups of split panes, native path picker (v2.1.0)

- /api/workspaces and `agenthub workspace(s)` / `--workspace` as aliases of
  /api/lanes and `agenthub lanes` / `--lane`; old names print one stderr note.
  REPL `help lanes|workspace|workspaces` resolves through the aliases.
- A workspace holds up to ten sessions (slots 0-9); every console tab is a
  group of 1-4 split panes (PaneGroups, agenthub.workspace.paneLayout);
  parseGroups keeps the stored active tab when an earlier one is dropped.
- Browse button beside path fields: POST /api/lanes/pick-path opens the OS
  picker on the server's desktop — loopback only and no forwarding header
  (EREMOTE), a display failure is ENODIALOG not a Cancel, the dialog is
  killed when the request closes, a folder field falls back to the in-app
  browser on any failure.
- Changes rail counts chip, image viewer (/git/raw), status bar session
  counts and per-day cost (`date=` on /api/pricing/cost).
- /agenthub-open and /agenthub-doctor run from the INSTALLED build
  (supersededBy), doctor offers fixes behind two confirmations; plugin-open
  treats a locked bootstrap as non-fatal.
- New-terminal shell waits for the first attach (issue #55).
- repo-onboarding / debug-live-issue skills removed.
- OpenAPI: pick-path, lane/date on /pricing/cost, tool on /run/history,
  /api/workspaces mount.

client/src/i18n/locales/en/lanes.json

@@ -45,8 +45,10 @@
   "addLaneWorktreesTitle": "Worktrees of this repo ({{count}})",
   "browse.button": "Browse",
   "browse.empty": "This folder is empty.",
+  "browse.fileTitle": "Browse for a file",
   "browse.select": "Select this folder",
   "browse.title": "Browse for a folder",
+  "browse.typePath": "No native picker is available here — type the path instead.",
   "changes.back": "All files",
   "changes.bin": "bin",
   "changes.binary": "Binary file — not shown.",
@@ -241,6 +243,7 @@
   "changes.nextHunk": "Next change",
   "changes.hunkOf": "{{n}} of {{total}}",
   "changes.noEditBinary": "Binary file — not editable here",
+  "changes.imageFailed": "Could not show this image (deleted, or larger than 20 MB).",
   "changes.noEditTooBig": "Too large to edit here (over 1 MB)",
   "changes.noEdit": "Not editable here",
   "gitBar.loginTitle": "Git needs a login for {{host}}",
@@ -291,8 +294,6 @@
   "changes.takeTheirsHint": "Take the incoming version of the whole file",
   "row.actions": "Workspace actions",
   "row.hint": "Double-click to rename · drag or Alt+↑/↓ to reorder · right-click for actions",
-  "menu.start": "Start",
-  "menu.stop": "Stop",
   "menu.rename": "Rename",
   "menu.newHere": "New workspace here…",
   "menu.copyPath": "Copy path",
@@ -321,6 +322,7 @@
   "tree.allTools": "All tools",
   "tree.newSession": "New session",
   "tree.noSessions": "No sessions yet",
+  "tree.closedTerminal": "Closed terminal — click opens a new one in this workspace's folder (Ctrl/Cmd+click: in a split)",
   "tree.transcriptHint": "No live pane — opens its conversation; a message you send resumes it",
   "tree.splitHint": "Live pane — Ctrl/Cmd+click opens it in a split beside the focused pane",
   "tree.renameSession": "Rename session",
@@ -349,7 +351,7 @@
   "home.localHint": "Work in the workspace folder itself",
   "home.worktree": "New worktree",
   "home.worktreeHint": "Run this session in its own git worktree — <repo>/.claude/worktrees/, a branch of its own, made and cleaned up by Claude Code",
-  "home.allBusy": "All four panes of this workspace are busy — stop one before starting another session.",
+  "home.allBusy": "All 10 sessions of this workspace are in use — stop one before starting another.",
   "home.recents": "Recents",
   "home.noRecents": "No sessions yet — start one above.",
   "home.instructions": "Instructions",
@@ -380,7 +382,7 @@
   "tabs.newTerminal": "New terminal",
   "tabs.terminal": "Terminal",
   "tabs.close": "Close tab (stops its session)",
-  "tabs.full": "All 4 tabs are in use — close one first",
+  "tabs.full": "All 10 sessions are in use — stop one first",
   "tabs.agentSettings": "Agent settings…",
   "tabs.splitHint": "Ctrl/Cmd+click: open in a split · drag onto a pane to place it",
   "panes.drag": "Drag to move this pane — onto another pane's edge to split there, onto its middle to swap",
@@ -388,9 +390,9 @@
   "panes.empty": "No session",
   "panes.split.right": "Split right",
   "panes.split.bottom": "Split down",
-  "panes.full": "4 panes is the most a workspace can show",
+  "panes.full": "A tab holds at most 4 panes",
   "panes.newTerminal": "New terminal",
-  "panes.close": "Hide pane (its session keeps running as a tab)",
+  "panes.close": "Move to its own tab (the session keeps running)",
   "panes.resize": "Resize panes",
   "tabs.home": "Workspace home",
   "sessionMenu.open": "Open",
@@ -401,7 +403,7 @@
   "panes.show": "Show {{name}} here",
   "panes.splitNew.right": "Split right with a new terminal",
   "panes.splitNew.bottom": "Split down with a new terminal",
-  "panes.closeShort": "Hide pane",
+  "panes.closeShort": "Move to own tab",
   "changes.copyPath": "Copy relative path",
   "changes.viewCommit": "View commit",
   "changes.copySha": "Copy commit SHA",
@@ -414,6 +416,7 @@
   "tabs.state.running": "Running",
   "tabs.renameHint": "Double-click to rename",
   "tabs.stopTitle": "Stop “{{name}}”?",
+  "tabs.stopGroupTitle": "Stop the {{count}} sessions in this tab?",
   "tabs.stopBody": "Closing the tab stops its session, even mid-turn. It can be resumed later from Recents.",
   "tabs.stopConfirm": "Stop session",
   "changes.loadMore": "Load more commits",
@@ -434,9 +437,6 @@
   "row.state.running": "running",
   "row.state.active": "active",
   "row.state.idle": "idle",
-  "menu.stopTitle_one": "Stop the running session?",
-  "menu.stopTitle_other": "Stop {{count}} running sessions?",
-  "menu.stopBody": "Every tab of this workspace stops, even mid-turn. Its sessions can be resumed later from Recents.",
   "gitBar.done.fetch": "Fetched",
   "gitBar.done.pull": "Pulled",
   "gitBar.done.push": "Pushed",

client/src/i18n/locales/en/nav.json

@@ -66,7 +66,8 @@
     "needYou": "{{count}} need you",
     "today": "Today {{cost}}",
     "workspace": "Workspace {{cost}}",
-    "session": "Session {{cost}}"
+    "session": "Session {{cost}}",
+    "tokens": "({{tokens}} Tokens)"
   },
   "version": "Version",
   "openMenu": "Open menu",