Reworks the Wallet screen to be more compact and to separate the two flows, and fixes a
reported bug.
Bug: buying a value with too few chips showed the generic "Something went wrong" toast — the
backend's `insufficient_chips` (409) code was propagated correctly but had no i18n mapping, so
`errorKey` fell back to `error.generic`. Add `error.insufficient_chips` / `error.product_not_found`.
Also disable a value's Exchange button up front when the spendable balance cannot cover it (the
server stays authoritative).
Redesign:
- a compact **balance** row leads the screen — the context's own chips (🪙 N) then any linked
other-platform chips behind that platform's logo (monospaced digits); inside a VK/TG store only
that store's own segment shows;
- the benefits section is renamed **Active**, moved above the store, shows one inline line
(hints + ad-free) and hides when nothing is active;
- the **store** splits by a two-way toggle into **Buy chips** (money packs + the watch-an-ad row at
the top) and **Spend chips** (values, exchanged for chips);
- a value's action reads **Exchange** and opens a single confirmation dialog (chip spends are
instant, with no provider window to confirm them); the existing cross-platform store-compliance
warning folds into that same dialog when the spend would draw VK/TG chips.
No payments-model or wire change; the money→chips→values model is unchanged (verified: money buys
only chip packs, values are chips-only — "no-ads for money" is structurally impossible).
Tests: wallet e2e updated for the new layout (chromium + webkit green). Docs: FUNCTIONAL (+_ru)
wallet story rewritten. App bundle budget 126 → 127 KB (always-loaded settings hub).
Ilia Denisov