feat(custom-geo): refresh index UI

Split the single ext-snippet column into Alias / URL / Routing /
Last-updated, with the alias surfaced next to a colored type tag,
the URL ellipsized with a tooltip + open-in-new-tab, and the
ext:file.dat:tag snippet click-to-copy via ClipboardManager.

Switch Last-updated to a relative time ("2 hours ago") with the
absolute timestamp on hover, add a friendly empty state, and show
a result toast when "Update All" finishes with partial failures.

customGeoEmpty translated for all 13 locales.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/translation/translate.fa_IR.toml

@@ -218,6 +218,7 @@
 "customGeoErrNotFound" = "منبع geo سفارشی یافت نشد"
 "customGeoErrDownload" = "بارگیری ناموفق بود"
 "customGeoErrUpdateAllIncomplete" = "به‌روزرسانی یک یا چند منبع geo سفارشی ناموفق بود"
+"customGeoEmpty" = "هنوز منبع geo سفارشی‌ای ثبت نشده — برای ایجاد روی «افزودن» کلیک کنید"
 
 [pages.inbounds]
 "allTimeTraffic" = "کل ترافیک"