feat: right-click menus everywhere, workspace/session cost, long-term DB safety

Right-click menus: one portal shell (components/ContextMenu.tsx) for every
item with actions - sidebar/Recents/archived session rows (SessionMenu),
console tabs, pane headers, the Changes panel's files/tree/commits, the
workspace home, sessions outside a workspace (SessionRowMenu: Sessions
table, Dashboard, Activity, Workflow runs), prompt images, every Settings
list and every Claude Code/Codex config list (FileItemMenu). Buttons stay;
a delete keeps its button's confirm; the shell stops portal clicks from
reaching the card that opened it.

Status bar: Workspace $ and Session $ on the Workspace page, from
?lane= on GET /api/pricing/cost and the focused/replayed session's cost.

Database, no data dropped: synchronous=NORMAL, journal_size_limit 64 MB,
hourly PASSIVE checkpoint + PRAGMA optimize, idx_events_session_created
(replacing the redundant idx_events_session), watchdog reads
sessions.transcript_path, transcript parsed before the hook's write
transaction, GET /api/sessions/:id?events=0 for the web page (reloads only
on its own session, debounced), streamed export, transactional clear-data
and chunked cleanup, subagent import reads tool_use_ids once, runtime logs
rotated past 5 MB.

client/src/i18n/locales/vi/ccConfig.json

@@ -44,6 +44,7 @@
     "viewSource": "Xem nguồn",
     "close": "Đóng",
     "copyPath": "Sao chép đường dẫn",
+    "copyName": "Sao chép tên",
     "copied": "Đã sao chép",
     "truncated": "(đã cắt bớt để xem trước)",
     "size": "Kích thước",
@@ -261,6 +262,7 @@
     "saving": "Đang lưu…",
     "renameLabel": "Tên profile",
     "renameHint": "Bấm để đổi tên",
+    "rename": "Đổi tên",
     "renameSuccess": "Đã đổi tên thành \"{{name}}\"."
   },
   "explain": {