Translate the labels the extractor could not see

Three places built user-visible English out of expressions rather than
writing it as JSX text, so the extraction codemod never found them and
they stayed English in all nine languages — including the five that have
been in production for weeks.

The calendar view switcher was the worst of them: it spelled its labels
as `v[0].toUpperCase() + v.slice(1)`, which is correct English and
untranslatable anywhere else. Day, Week, Month and Agenda were already in
every catalogue, sitting unused, because the buttons never asked for
them. They now come from a Record<View, () => string>, so TypeScript
makes the map exhaustive and adding a view forces adding its label. The
labels are functions rather than values: a module-level object would
capture whichever language happened to load first and keep it.

The other two needed new source strings, added to all nine catalogues:
the composer's title for an untitled draft ("New message"), its status
line ("Sending…", "Saving…", "Error", "Saved {when}", "Unsaved"), and the
agenda view's own title ("Agenda from {date}").

This is not the whole of it. A sweep for the same shape — template
literals, toast arguments, and dialog props rather than JSX text — turns
up roughly a hundred more strings, mostly toasts and confirmation
dialogs. Those are a second extraction pass rather than a fix, and are
left for one.

web/src/locales/uk.ts

@@ -844,6 +844,15 @@ export const catalog: Catalog = {
     "This translation was generated by AI and has not been checked by a native speaker, so it is marked Beta until somebody who speaks it signs it off. Anything that reads wrongly is worth reporting — {report}.": "Цей переклад зроблено ШІ й не перевірено носієм мови, тому його позначено як Beta, доки хтось його не підтвердить. Про все, що звучить неправильно, варто повідомити — {report}.",
     "{name} is the palette from {site}, and what a new account starts on. It is a dark theme, so it counts as dark wherever that matters, and the accent colour below still applies on top of it.": "{name} — це палітра з {site}, з якою починає новий обліковий запис. Тема темна, тому скрізь, де це важливо, вважається темною, а акцентний колір нижче застосовується поверх неї.",
     "ihasmail's own version is the date of the commit it was built from, followed by where that commit came from: {example} was built from a commit dated the 30th of August 2026 that arrived through pull request 129. A commit that did not come through one carries its short SHA instead — {sha}. The version deliberately says nothing about Stalwart; what this build needs from the server is the line above.": "Власна версія ihasmail — це дата коміту, з якого його зібрано, і вказівка, звідки цей коміт узявся: {example} зібрано з коміту від 30 серпня 2026 року, що надійшов через pull request 129. Коміт, який надійшов інакше, несе замість цього короткий SHA — {sha}. Версія навмисно нічого не повідомляє про Stalwart; те, що цій збірці потрібно від сервера, вказано рядком вище.",
+
+    // ── Composer status, calendar title ────────────────────────────────
+    "New message": "Новий лист",
+    "Sending…": "Надсилання…",
+    "Saving…": "Збереження…",
+    "Error": "Помилка",
+    "Saved {when}": "Збережено {when}",
+    "Unsaved": "Не збережено",
+    "Agenda from {date}": "Розклад від {date}",
   },
   plurals: {
     /*