refactor: switch the whole project to English

talk is going to be published. Code comments, CLI output, error messages,
daemon log lines, MCP descriptions and results, test names and assertions,
README, spec, skill, build scripts and flake are now English. Only the
spoken announcement texts stay bilingual: the wrap result and the test
sentence are German or English depending on the detected language.

Language fallback is now configurable: `lang = "en" | "de"` (env
TALK_LANG, default en) is used when detection cannot tell (numbers, single
words, ties) and for talk's own announcements. langdetect.Detect takes the
fallback as an argument instead of hard-coding German. `talk setup` asks for
it; `talk doctor` and `talk status` show it.

Vocabulary pinned across packages so the process-boundary tests observe
stable strings: chain log lines ("chain: tier X skipped (not available)",
"falling back to the next tier", "spoken via X"), queue lines ("discarded:
quiet hours ... active", "replaced by toast", "max_age"), CLI notes
("speaking directly", "daemon started at", "no daemon", "nothing to cancel"),
status block with aligned English labels, MCP messages, origin guard 403.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

internal/queue/doc.go

@@ -1,9 +1,10 @@
-// Package queue implementiert die Ansage-Queue des Daemons: serialisierte
-// Abarbeitung (eine Ansage gleichzeitig), Prioritäten (high > normal > low,
-// FIFO je Level), now-Items springen vor, dazu den persistenten Mute-State
-// (Datei mute im Config-Dir). Seit Task 05 unter dem Anti-Spam-Gesetz
-// (rate.go/quiet.go): Rate-Limit — jede gestartete Ansage bucht das Fenster;
-// low über dem Budget verfällt, normal parkt bis zum Slot, high darf mit
-// Burst-Recht verstoßen — und Ruhezeiten, die still verwerfen oder durch
-// einen Toast ersetzen. now:true bricht bewusst aus beiden aus.
+// Package queue is the daemon's announcement queue: serialized playback (one
+// announcement at a time), priorities (high > normal > low, FIFO per level),
+// now items that jump ahead, plus the persistent mute state (file "mute" in
+// the config directory). The anti-spam laws (rate.go, quiet.go) sit on top:
+// a rate limit where every started announcement books the window (low over
+// budget is discarded, normal parks until the slot, high may break it with
+// burst rights), quiet hours that discard silently or toast instead, a text
+// length cap and a maximum queue age. now:true deliberately breaks out of
+// all of them.
 package queue