Simplifies the tenant Visibility tab to match the tenant-only appearance
model established by the previous commits:
- primary_color: now required. Removed the "No brand color / Use system
default (no brand accent)" toggle — every tenant carries a concrete
primary color. Legacy NULL rows render the neutral app default (#2fa4a4)
in the color picker and are converted to that explicit hex on save.
- default_theme: the select no longer offers a "Use system default" empty
option. Legacy NULL rows resolve to 'light' at render time; saves always
persist a valid theme via SettingsAppGateway::normalizeTheme().
- allow_user_theme: replaced the tri-state "Use system default (allowed) /
Force allow / Force disallow" select with a single boolean switch
("Users may choose their own theme"). Legacy NULL rows load as checked.
Saves persist 0/1 explicitly.
TenantService: sanitize no longer reads primary_color_use_default or
allow_user_theme_mode; it validates primary_color as a required hex and
treats allow_user_theme as a plain boolean. Both create and update paths
write concrete values only — no more NULL writes for these three fields.
DirectorySettingsGateway gains a normalizeTheme() delegate so TenantService
can route through the same gateway it uses for isAllowedTheme().
Removed now-unused app-color-default-toggle JS component + its runtime
registration + its architecture-test entry. i18n cleanup: "No brand
color", "Use system default (no brand accent)", "When enabled the tenant
renders without a brand accent color.", "Use system default (light)",
"Use system default (allowed)", "Force allow user theme", "Force disallow
user theme", "User theme policy is invalid" all removed. New copy: "Users
may choose their own theme" + helper text, plus a tightened tab blockquote.
Tests: TenantServiceTest validInput() updated to send concrete values;
settingsGateway mock gets normalizeTheme() + isAllowedTheme() defaults.
All 1985 tests pass; PHPStan level 5 clean; QG-006 clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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