docs: refresh all screenshots and illustrate phase 58–68 workflows

screenshots/README.md

@@ -1,24 +1,49 @@
 # xtc screenshots
 
-Captured from the Phase 38 FLTK application on 2026-10-28, with Phase 39
-transport, mixer, arrangement and command captures refreshed on 2026-10-30 using
-a virtual X11 screen. Images show actual rendered widgets, without mockups or image edits.
+All captures refreshed from the Phase 68 FLTK application on 2026-11-06.
+These are actual rendered application windows and menus on a 1440 × 960 virtual
+X11 screen, without mockups, compositing or image edits.
 
-![Overview of xtc screenshots](overview.png)
+![Arrangement with named sections](overview.png)
 
-Internal instrument dropdowns show Soft Keys and Sub Bass; internal delay and
-reverb captures show the actual editable effect controls.
+The temporary demonstration project starts from
+`examples/projects/modern-session.xtc`, adding Intro/Verse/Chorus/Outro markers,
+a routed music bus and gain automation. Editing results use the real control
+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.
 
-The arrangement uses `examples/projects/modern-session.xtc`. Mixer captures add
-a bus, routing, pan/level settings and automation. The playing view shows actual
-JACK callback meters; additional captures show the minimum 1220 × 720 layout and
-a larger session scrolled to its final channels, with the master monitor pinned.
-The audio view adds a temporary generated waveform. Plugin views use the
-repository's LADSPA, CLAP, VST2 and VST3 test fixtures; these are demonstration
-plugins, not commercial instruments. Preferences show application defaults and
-the staged loop. The command palette shows the available application actions.
-The workspace now includes direct BPM editing, a live track inspector and
-arrangement navigation. No user configuration or example project was overwritten.
+## New arrangement and composition workflows
+
+| Phase | Feature | Captures |
+| --- | --- | --- |
+| 58 | Persistent named arrangement markers | [Ruler](arrangement-markers.png), [marker editor](marker-edit.png) |
+| 59 | Section navigation and looping | [Current section loop](section-navigation.png) |
+| 60 | Ripple time insertion/removal | [Controls](ripple-time.png), [inserted gap](ripple-result.png) |
+| 61 | Complete track duplication | [Independent layered track](track-duplication.png) |
+| 62 | Nondestructive MIDI splitting | [Split clip](midi-split.png) |
+| 63 | MIDI clip consolidation | [Consolidated clip](midi-consolidation.png) |
+| 64 | Seeded MIDI humanization | [Timing, velocity and seed](midi-humanize.png) |
+| 65 | Chord construction | [Intervals](midi-chord-builder.png), [generated notes](midi-chords-result.png) |
+| 66 | Offline arpeggio generation | [Step, gate and direction](midi-arpeggio.png), [written pattern](midi-arpeggio-result.png) |
+| 67 | Audio peak normalization | [Target dBFS](audio-normalization.png), [normalized clip](audio-normalization-result.png) |
+| 68 | Portable media collection | [New destination folder](project-collection.png) |
+
+Collection is also executed by the capture tool into its temporary directory;
+the screenshot shows its destination prompt, not a file browser or progress UI.
+See [COMPOSITION_WORKFLOWS.md](../docs/COMPOSITION_WORKFLOWS.md) for precise
+behavior, limits and commands. The screenshots illustrate implemented workflows;
+they do not establish feature parity with other DAWs.
+
+## Refreshed application views
+
+All pre-existing images below were recaptured. Mixer playback meters come from
+real JACK callbacks. The minimum-size capture uses a 1220 × 720 main window;
+the scrolled view adds twelve tracks. Audio views import the repository's
+`original-pluck.wav` and apply clip gain/fades. Plugin views use repository test
+fixtures, not commercial plugins. Internal instrument menus and delay/reverb
+editors show the real available devices and controls. The command palette uses
+the current application action list.
 
 - [Sequencer loop](sequencer-loop.png)
 - [Mixer automation](mixer-automation.png)
@@ -55,5 +80,25 @@ arrangement navigation. No user configuration or example project was overwritten
 - [Detached mixer](mixer-detached.png)
 - [Workspace with transport and mixer detached](workspace-detached.png)
 
+
+- [Detached sequencer](sequencer-detached.png)
+- [Detached modular graph](graph-detached.png)
+
 Detach panels from the View menu; close a floating window or use its Dock button
-to return it to the main window. The main arrangement uses the freed toolbar space.
+to return it to the main window.
+
+## Reproduce the gallery
+
+From the repository root, run:
+
+```sh
+make BUILD_DIR=build/next-daw screenshots
+```
+
+This optional documentation target requires the existing FLTK/JACK build
+prerequisites, a running JACK server, Xvfb (`xvfb-run`), ImageMagick (`import`) and
+`xdotool`. It builds the repository plugin fixtures, runs
+[the capture tool](../tools/capture_screenshots.cpp), and replaces the gallery
+PNGs. All demonstration edits and collection outputs use an automatically removed
+temporary directory; no preferences are saved. It neither installs dependencies
+nor starts/reconfigures the audio server.