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/pt-BR.ts

@@ -851,6 +851,15 @@ 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}.": "Esta tradução foi gerada por IA e não foi revisada por uma pessoa nativa, então está marcada como Beta até que alguém a aprove. Tudo o que soar errado vale um aviso — {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} é a paleta de {site}, e com a qual uma conta nova começa. É um tema escuro, então conta como escuro onde isso importa, e a cor de destaque abaixo continua valendo por cima dele.",
     "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.": "A versão do próprio ihasmail é a data do commit a partir do qual ele foi compilado, seguida da origem desse commit: {example} foi compilado a partir de um commit de 30 de agosto de 2026 que veio pela pull request 129. Um commit que não veio por uma delas carrega no lugar o SHA curto — {sha}. A versão não diz nada sobre o Stalwart de propósito; o que esta compilação precisa do servidor está na linha acima.",
+
+    // ── Composer status, calendar title ────────────────────────────────
+    "New message": "Nova mensagem",
+    "Sending…": "Enviando…",
+    "Saving…": "Salvando…",
+    "Error": "Erro",
+    "Saved {when}": "Salvo {when}",
+    "Unsaved": "Não salvo",
+    "Agenda from {date}": "Agenda a partir de {date}",
   },
   plurals: {
     "{n} messages": { one: "{n} mensagem", other: "{n} mensagens" },