feat(loyalty): align program view, edit, and analytics pages across all frontends

Standardize naming (Program for view/edit, Analytics for stats), create shared
read-only program-view partial, fix admin edit field population bug (14 missing
fields), add store Program menu item, and rename merchant Overview→Program,
Settings→Analytics.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/loyalty/locales/en.json

@@ -88,6 +88,7 @@
         "terminal": "Terminal",
         "customer_cards": "Customer Cards",
         "statistics": "Statistics",
+        "program": "Program",
         "overview": "Overview",
         "settings": "Settings"
     },