feat(midi): qualify routed startup and refresh workflow screenshots (phase 105)

screenshots/README.md

@@ -1,7 +1,8 @@
 # xtc screenshots
 
-The complete gallery was refreshed after Phase 89 on 2026-11-06, including
-the sample editor, compact workspace and real installed VST3 insert chains.
+The complete gallery was refreshed after Phases 100–105 on 2026-11-06, including
+MIDI preferences/import, the sample editor, creative workflows and real installed
+VST3 insert chains.
 These are actual rendered application windows and menus on a 1440 × 960 virtual
 X11 screen, without mockups, compositing or image edits.
 
@@ -14,10 +15,27 @@ APIs and GUI history/preparation paths. Original projects, media and user
 configuration are not overwritten. Black margins are the virtual desktop;
 floating views show the actual detached windows together.
 
+## MIDI devices, defaults and file exchange (Phases 100–105)
+
+- [MIDI source/destination preferences and channel defaults](preferences-midi.png)
+- [Device setup and MIDI defaults help](preferences-midi-help.png)
+- [File menu with MIDI import and selected-clip export](midi-file-menu.png)
+- [An exported clip reimported into a new arrangement](midi-import-arrangement.png)
+- [The imported notes and velocities in the piano roll](midi-import-piano-roll.png)
+
+These captures use real file export/import and the real preferences schema. No
+hardware device names or connected devices are fabricated; blank port defaults
+mean no automatic connection. Actual device choices depend on host JACK/PipeWire
+exposure. Configuration paths are disabled in captures to preserve user settings.
+See [MIDI workflows and limits](../docs/MIDI_WORKFLOWS.md).
+
+Reproduce these five captures with
+`XTC_CAPTURE_MIDI_ONLY=1 make BUILD_DIR=build/audio-editor screenshots`.
+
 ## Creative workflows (Phases 90–99)
 
-Four additional real captures show the current transport Tap button, insert
-meters and new creative controls. Earlier gallery images retain Phase 89 UI.
+Four real captures show the current transport Tap button, insert meters and
+creative controls; the rest of the gallery also reflects the current UI.
 
 - [Dub Echo template in the insert graph](creative-dub-rack.png)
 - [Rack actions: bulk edits, comparison and chain clipboard](creative-rack-actions.png)