Show per-account usage bars inline in the launch account popover

[h0x91b]

The launch picker's account popover kept each account's quota behind a per-row chevron, so every account comparison cost a click per row — the bars are the reason the popover gets opened at all.

Now every row renders its own quota inline: one label · bar · % used · resets in line per limit window, for all accounts at once.

• Dropped the chevron, its expand state, and the redundant max-severity headline percentage (the bar lines carry the numbers). The ∞ unlimited chip stays — an unlimited account has no bar to draw.
• Capture age moved from a full line per account to a compact suffix on the last bar line (· 15h), warning-tinted once the reading is older than STALE_AFTER_MS, with the full sentence in the title. New shared CapturedAgeSuffix in rate-limit-ui.tsx.
• Panel widened 21rem → 25rem with min-w on the bar: at the old width the right-hand text squeezed the bar down to ~40px. The row list now scrolls (max-h-[min(28rem,60vh)]) instead of growing past its dialog; header and provenance hint stay pinned.
• Each row is again exactly one focusable element, so the popover's Tab ring shrank. Bars stay aria-hidden; the percentages are real text.
• Removed launch.accountShowUsage / launch.accountHideUsage and added rateLimits.capturedAgeNow across en/ru/es.

Verified in headless Chromium at 1440px and 390px (clamps to 374px, nothing wraps or clips), no console errors; full test suite green.