fix(settings): reachable opt-in toggle for the bookkeeping digest (#2085)

* fix(settings): reachable opt-in toggle for the bookkeeping digest

The digest toggle shipped in PR #2078 inside the push-notifications
extension's settings panel, but that extension is not enabled on hosted
(extensions.config.json), so the panel never renders and nobody could
opt in: the cron and email path were live with an unreachable switch.

Adds an "Aviseringar" group on the core account settings tab with the
email_digest_enabled toggle (upsert on notification_settings, own-row
RLS), localized in both sv and en. The extension panel keeps its copy
for installs that enable push-notifications.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0122MznXxrLRyT96fGhfyzD4

* fix(i18n): natural English label for the digest toggle

Skeptic note: "New to bookkeep" is awkward; "New items to book" mirrors
the Swedish "Nytt att bokföra".

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0122MznXxrLRyT96fGhfyzD4

* fix(settings): log digest-toggle read/write failures

Compliance swarm (ASVS V16.2, SOC 2 CC7.2): the catch blocks swallowed
errors silently; surface them via console.error like the sibling
notification settings component.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0122MznXxrLRyT96fGhfyzD4

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

messages/en.json

@@ -582,6 +582,13 @@
   "settings": {
     "group_profile": "Profile",
     "section_name": "Name",
+    "digest_group": "Notifications",
+    "digest_label": "New items to book",
+    "digest_description": "A daily email when new bank transactions or inbox documents are waiting to be booked. Counts only, never amounts.",
+    "digest_switch_label": "Daily summary by email",
+    "digest_enabled_toast": "Daily summary enabled",
+    "digest_disabled_toast": "Daily summary disabled",
+    "digest_save_failed": "Could not save the setting",
     "name_label": "Your name",
     "name_description": "Used when we address you and shown as the contact person on some documents.",
     "name_placeholder": "First name Last name",

messages/sv.json

@@ -582,6 +582,13 @@
   "settings": {
     "group_profile": "Profil",
     "section_name": "Namn",
+    "digest_group": "Aviseringar",
+    "digest_label": "Nytt att bokföra",
+    "digest_description": "Ett dagligt mejl när nya banktransaktioner eller underlag i inkorgen väntar på bokföring. Endast antal, aldrig belopp.",
+    "digest_switch_label": "Daglig sammanfattning via e-post",
+    "digest_enabled_toast": "Daglig sammanfattning aktiverad",
+    "digest_disabled_toast": "Daglig sammanfattning avstängd",
+    "digest_save_failed": "Kunde inte spara inställningen",
     "name_label": "Ditt namn",
     "name_description": "Används när vi tilltalar dig och visas som kontaktperson på vissa underlag.",
     "name_placeholder": "Förnamn Efternamn",