T26c Media: video

Scrubber shows what has loaded, what has played and its chapters, names
the time under the pointer, seeks by press and gpui's drag, and steps by
the slider's keys; over_media lights it for a dark layer. VideoPlayer
shows the host's frame in its shape with a caption and a control bar over
it: the scrubber, play, the time, speed, captions, picture in picture and
full screen, each only with its handler; the bar rests after a still
pointer while it plays, on one wake from the executor's timer. Keys:
Space and K, J and L, the arrows, C and F. VideoThumbnailStrip lays frames
along the length under a playhead with a trim whose handles drag and whose
ends I and O set. SubtitleEditor edits cues in place: times as mm:ss.mmm,
kept in order, a time that does not read kept out with the reason shown.

InlineEdit is a Tab stop with the ring; it hands focus back after Enter or
Escape and keeps its text on Enter's release. overlays::media_button is
shared by the lightbox and the player's bar.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/primitives/icon.rs

@@ -72,6 +72,8 @@ icons! {
     CalendarRange => "calendar-range",
     Calendar => "calendar",
     Camera => "camera",
+    Captions => "captions",
+    CaptionsOff => "captions-off",
     CaseSensitive => "case-sensitive",
     ChartArea => "chart-area",
     ChartBar => "chart-bar",
@@ -138,6 +140,7 @@ icons! {
     Folder => "folder",
     Forward => "forward",
     Frame => "frame",
+    Fullscreen => "fullscreen",
     Gauge => "gauge",
     GitBranch => "git-branch",
     GitCommitHorizontal => "git-commit-horizontal",