phsl / new-api

* feat(dashboard): add traffic flow sankey chart

Add dashboard flow APIs and a Sankey-based flow view with user, optional API key, model, and channel layers.\n\nReuse the dashboard VChart palette, add precise link/node tooltips and interactions, and cover filtering, layer ordering, color stability, and error states with tests.

* feat: build flow chart from quota data

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Co-authored-by: CaIon <i@caion.me>

- Show 3-column card grid from xl breakpoint instead of 2xl
- Cap inline priority/weight width to avoid huge values stretching cards
- Collapse right-column grid to content-sized columns, removing wasted space
- Memoize channel columns, context value, upstream-update result, and ChannelCard
  to avoid rebuilding/re-rendering all cards on unrelated state changes

Group #id/name and balance on the left and priority/weight plus
response/last-tested on the right. Simplify field labels by dropping
the CJK-unfriendly uppercase/letter-spacing, left-align the right
column, and shorten the "Last Tested" zh label.

Add an opt-in card view to the shared data-table stack (DataTablePage),
toggled via a segmented control in the toolbar with per-table localStorage
persistence. Cards render generically from column meta by default, with an
optional renderCard slot. Defaults to table-only so existing pages are
unchanged.

Wire it into the channels page with a bespoke ChannelCard that reuses every
column's cell renderer, preserving all table information and interactions
(selection, inline priority/weight, balance refresh, status, actions, tag
expand).

* refactor: codex usage ui

* feat: show Codex reset credit details

* feat: add Codex usage reset flow

- add oxlint and oxfmt configuration for web/default quality checks

- replace ESLint and Prettier scripts with protected-header Oxc formatting

- update frontend workspace dependencies for oxlint and oxfmt

feat(subscription): add support for wallet overflow and downgrade group functionality in subscription plans

feat(data-table): add column visibility storage functionality for API keys, channels, and usage logs