CompletionLocal mirrors the v15 wire (anchor byte, windowed rows,
selection); a close always applies even for a switched-away buffer
(dropping it would wedge a stale popup), while opens follow the CrdtOp
current-buffer rule. Rendering is a dedicated dropdown layer (fourth
TextRenderer + quad batch, the mb_dropdown_* shape): the anchor byte
maps to its glyph rect via the caret walk, rows draw below the anchor
line growing toward the band (flipping above when nothing fits), width
clamps to the window with the left edge shifted back from the right
margin, and the visible slice windows around the selection (F-007
discipline). Kind glyphs replicate the TUI popup's mapping.
Key routing (Q#C6) turned out narrower than framed: C-n/C-p/C-g
already round-trip as command chords and Up/Down as forwarded motion
keys, so only two defaults are wrong under a popup and get gated on
completion_open -- Esc (dismisses via round-trip instead of the local
quit) and RET/TAB (skip the optimistic insert so they accept via
dispatch_completion_key instead of typing a newline/tab). Typing stays
fully optimistic; the daemon's after-edit refresh re-ships the popup.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Levi Neuwirth
d20a97ca7b