docs: source badge name only, no signals lock, the Add-a-signal page

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

docs/claude/architecture.md

@@ -123,7 +123,7 @@ overlay is built (the tour's overlay wraps the whole window, so its dim rectangl
 too); the trigger form is registered as
 a page by `build_trigger_panel`; `build_source_panels()` registers the source pages; and
 `build_badge_bar()` runs *after* all of them, because the Source badge needs to know the first page.
-Per-tick state (the Trigger word, the Source name and `connected`, the open marks) is written by
+Per-tick state (the Trigger word, the Source name, the open marks) is written by
 `sync_badge_bar()`, called from `tick()` and from `slideover_open`/`slideover_close`; it writes a label
 only when its text changed. Nothing in the badge bar or the slide-over may be read from the producer
 thread.