The Send tab auto-selected the highest-balance address on first load.
When another tab had already pre-filled the source with "Send from this
address", that first-load pick overwrote the user's choice, and the
dropdown's selected index could drift out of step with the address that
would actually be debited when the address list changed.
- The send-from string is now the single source of truth. The one-shot
auto-pick only fills an empty source and never replaces one the user
or another tab set, and the list index is re-derived from the string
each frame so it cannot desync.
- An explicit "Send from this address" choice latches the auto-pick off,
so the first visit cannot undo it.
- A chosen source the dropdown does not list (zero balance, view-only,
or the list still loading) now previews the address that will be
debited instead of the "Select a source" placeholder.
User-visible: a send-from address chosen from another tab survives the
first load and later refresh ticks.
Tests: the source resolver keeps a pre-fill on first visit, fills an
empty source with the best spendable address, keeps a source missing
from a short list with index -1, latches nothing while disconnected or
with an empty list, and re-derives a stale index from the string.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>