feat: swap pro order panel slider, stable-coin payment and limit rate precision (OK-57853)

[haicongliao]

Summary

Jira: OK-57853

Rework the Swap Pro order panel per the 6.6 design:

• Replace the quick-amount segment input with a draggable percentage slider (0/25/50/75/100, continuous drag, native haptics), for both BUY/SELL and Market/Limit; slider position is derived from the typed amount so typing, presets and token switches stay in sync.
• Balance row: add a deposit "+" entry (reuses ReceiveSelector) and a pay-token switcher (text-style trigger; hidden on single-token networks; switching resets the amount and re-quotes).
• Stock tokens trade only against stable coins in BOTH directions: native coin is filtered from candidate pools, grayed out in the selector, and a persisted native-coin preference never re-applies while a stock token is selected.
• 100% drag on a native token keeps the network-fee reserve (with the same toast as balance max press).

Sub-1 limit rate precision family (many-leading-zeros tokens no longer collapse to "0"):

• clampLimitRateDecimals in shared numberUtils, applied at the market-rate source atom, rate storage, price display, order card and order detail modal; sub-1 rates always keep leading zeros + at least 6 significant digits.
• Typing ultra-small prices key-by-key now works (all-zero prefixes are accepted while composing); unknown token decimals fall back to 6 instead of 0.
• Order card and its detail modal now compute the same display price via one shared helper (with degenerate-order guards), plus unit tests.

Action button & review dialog:

• Button label amount is single-sourced with the Est. Receive row; the parenthesized fiat value always shows what the user pays (was mixing limit-derived quantity with market unit price).
• Loading only on the first actionable quote of a pair; account-resolving shows a skeleton instead of flashing "Select wallet".
• New warning in the review dialog (mobile Pro + desktop, same component): when the market rate already beats the user's limit rate, show "Market price is better than your limit — this order may fill at market price instantly" (limit.marketable_fill_tip, gated on the quote's own limit protocol and pair-matched rates).

Also: per-direction amount stash with context fingerprints (no cross trade-type/pay-token resurrection), Android Nitro hybridRef re-fire guard for SegmentSlider, quote input debounce constants (300ms Pro / 500ms base), left/right column bottom alignment, trade list row tuning (5/9 rows).

Test Plan

• yarn agent:check --profile commit passes; jest packages/kit/src/views/Swap 346/346 passes.
• Manually verified on iOS simulator: slider drag/typing/presets, stock token payment restrictions, ultra-small price token (dmt-nat) limit flows, marketable-limit warning in review dialog, order card/detail price display.

🤖 Generated with Claude Code

[haicongliao]