feat(quota): visually separate reset countdown and show window interval

[SaladDay]

Summary

Implements the mmx quota layout proposed by @airvzxf in #240: the reset countdown now lives in its own boxed column, prefixed with the quota window duration (5h / 1d / 1w) so it is clear which window the countdown applies to.

Closes #240

Before

╭───────────────────────────────────────────────────────────────────────────╮
│ MINIMAX  TokenPlan Quota                    Week: 2026-08-24 — 2026-08-31 │
├───────────────────────────────────────────────────────────────────────────┤
│ general  Left             94%   Wk left             34%    Reset 2h 33m   │
├───────────────────────────────────────────────────────────────────────────┤
│ video    Left            3 / 3  Wk left            3 / 21  Reset 6h 33m   │
╰───────────────────────────────────────────────────────────────────────────╯

After

╭─────────────────────────────────────────────────────────────────────────────╮
│ MINIMAX  TokenPlan Quota                      Week: 2026-08-24 — 2026-08-31 │
├───────────────────────────────────────────────────────────┬─────────────────┤
│ general  Left             94%   Wk left             34%   │ 5h Reset 2h 33m │
├───────────────────────────────────────────────────────────┼─────────────────┤
│ video    Left            3 / 3  Wk left            3 / 21 │ 1d Reset 6h 33m │
╰───────────────────────────────────────────────────────────┴─────────────────╯

(Bars are rendered as colored blocks in a real terminal; they are stripped in the text mockups above.)

Changes

• formatWindow() derives the window tag from end_time - start_time — no API changes needed.
• boxLine() takes an optional divider offset and draws ┬ / ┼ / ┴ junctions (+ in --no-color ASCII mode).
• In color mode the 5h Reset label is dimmed so the countdown stays the visual focus; not in plan rows render Reset — without a window tag.
• The Left / Wk left labels are kept (rather than relying on color alone, as floated later in the issue) so the table stays readable in --no-color mode and for color-blind users.
• The per-model reset column is kept per row instead of a shared footer row, since reset times differ between models.

Testing

• New test asserting the window tags and the boxed reset column.
• bun test — quota-table suite 8/8; full suite has 2 pre-existing failures (test/sdk/file.test.ts, test/commands/auth/refresh.test.ts) that also fail on main.
• tsc --noEmit and eslint clean.
• Alignment verified line-by-line for: color EN, CN region (CJK double-width labels), unlimited + not in plan edge rows, and --no-color ASCII mode.

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