F4 — the Logs drill had no copy affordance: LivePane is RichLog-family,
which captures the mouse and implements no text selection (Top/Config
are selectable Statics). LivePane (tui-core, shared) now keeps a
plain-text tail buffer (markup stripped, capped 2000 lines) exposed via
tail_text(); c3 routes [Y] to the visible pane's tail on the Containers
Logs drill and the ③ Gate run output. Placeholders and display-only
notes are NOT buffered (append_line buffer=False), so [Y] on an idle
drill falls through to the highlighted container name as before. The
transient #serve-live pane keeps the established slug-copy semantics.
F8 — the idle placeholder was hardcoded test-runner wording ('Ready.
Select a test and press Enter to run.') that leaked into the docker-logs
drill. The placeholder is now constructor-owned (neutral 'Ready.'
default); c3 mounts pass pane-specific copy (logs drill / gate output /
'' for the hidden serve pane). c3t is unaffected (own vendored pane).
Tests: 6 tui-core unit tests (tail buffer, unbuffered notes, cap,
placeholder contract; 76/76) + 4 headless (placeholders, tail copy wins
over row-primary on the Logs drill, idle fall-through to container name,
③ Gate tail); c3t 83/83; c3 suite 762/762.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EfF565T9eSLaqGzidyJ1Pm
da11b4cf56