Kitty implements the OSC 5522 "list available MIME types" reply by
sending one DATA packet whose `mime` field decodes to the literal `.`
and whose payload carries the available types as a whitespace-separated
list (see `fulfill_read_request` in kovidgoyal/kitty:kitty/clipboard.py
when the requested MIME is `TARGETS_MIME = '.'`). The 5522-mode
ancillary spec (rockorager.dev/misc/bracketed-paste-mime) instead
encodes each available type as its own DATA packet with an empty
payload.
The TUI's EnhancedPasteController only honored the ancillary form. When
Kitty delivered the dot-listing form for a plain-text paste, the parser
pushed `.` into the candidate list, `choosePasteMime(["."])` matched
nothing, and the editor surfaced "Clipboard paste has no supported text
or image data" instead of inserting the text.
Decode the payload as a UTF-8 whitespace-separated MIME list when the
DATA packet's mime is the dot sentinel, then fall through to the
existing per-type behavior. Add two regression tests covering the
single-type and multi-type Kitty payload shapes.
Fixes#2051
roboomp
43477234e2