Two new Settings pages, each the single home for its feature.
Username (SettingsPage::Username) consolidates everything name-related
off the main Settings and out of the identity card: claim a name if you
have none, release the one you own, and choose the name authority from a
known list OR a free-typed custom server. Reuses the existing claim_ui and
claim/release worker flow; the old inline name-authority editor and the
main-settings claim card are removed (single home).
Advanced Privacy (SettingsPage::AdvancedPrivacy) replaces the lone
"hide amounts" toggle. Notifications section: hide amounts (existing),
hide names, or hide all details (a generic localized private alert that
leaks no name or amount; an empty amount collapses the Android
notification template to just the private line). Anonymous mode: one
toggle that censors STRICTLY the home balance (dots, tap to reveal; the
fiat rate fetch stays off until revealed) and the activity list (dots for
names and amounts, tap a row to reveal and open). Presentation only, with
no money-path or storage change.
Migration: the existing hide_amounts config keeps its exact meaning
(notification amount hiding); the three new fields default off, so no
surprise on upgrade. Covered by a new config test (227 lib tests).
All new strings via t!() in all six locales; drift test green.
2ro
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