#1509: Timeline effect rows show the effect's colour label

Problem: effect colour labels (26.5) were drawn only on the Effect Controls header; the Timeline's effect rows looked unlabelled.

Fix: an effect group row in the Timeline paints the label colour as a 4 px bar on its left edge (same look as the Effect Controls header) and registers `timeline.group.<uid>.label` with the label's name for agents. Docs: gaps.md row 21 and ui-parity.md updated.

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

docs/gaps.md

@@ -77,7 +77,7 @@ are grouped by area; the issue tracker has the rest.
 | 18 | **Relative paths and relinking** | Projects store absolute footage paths; no relink when a project moves | Moving or sharing a project breaks it | 6–12 h | G4 · [file-format-parity.md](file-format-parity.md) |
 | 19 | **Plug-in ecosystem** | No After Effects SDK hosting (#600, #327 OpenFX, #334, #376 plug-in manager); our WebAssembly API has no third-party plug-ins | Many pro projects depend on Trapcode, Element, Saber… | 40–80 h for API growth; SDK hosting needs an owner decision | G8 · [scripting-parity.md](scripting-parity.md) |
 | 20 | **Multi-monitor and video output** | #486: any panel can move into a native window of its own (panel menu ▸ Move Panel to New Window, `window.panelWindow`) and so onto another screen, restored with the workspace; still missing: dragging tabs between those windows, app shortcuts while one has the focus, named workspaces remembering them, Mercury Transmit to video hardware (we have a second preview window only) | Two-screen setups are standard for professionals | 10–20 h | G2 · [hardware-parity.md](hardware-parity.md) |
-| 21 | **Small 26.x features** | Proportional Scrubbing (26.2), pasting Illustrator's own clipboard data as shapes (26.3; SVG markup on the clipboard pastes as a shape layer, #738), variable-font filter (26.3), the rebuilt Effect Controls (26.5). Percentage guides (View ▸ Add Percentage Guide, Convert Guides to Percentage / Pixels) and effect colour labels (Effect Controls header bar and right-click Label menu, `effect.setLabel`) are in (#1095), built from the release notes' one-line descriptions and never compared with After Effects: the Timeline shows no effect label, and the labels' exact UI there is unknown | Users of the current version expect them | 10–20 h left | — · [ui-parity.md](ui-parity.md) |
+| 21 | **Small 26.x features** | Proportional Scrubbing (26.2), pasting Illustrator's own clipboard data as shapes (26.3; SVG markup on the clipboard pastes as a shape layer, #738), variable-font filter (26.3), the rebuilt Effect Controls (26.5). Percentage guides (View ▸ Add Percentage Guide, Convert Guides to Percentage / Pixels) and effect colour labels (Effect Controls header bar and right-click Label menu, `effect.setLabel`) are in (#1095), built from the release notes' one-line descriptions and never compared with After Effects: the Timeline's effect rows wear the label as a colour bar on the left edge (#1509), but After Effects' exact UI there is unknown | Users of the current version expect them | 10–20 h left | — · [ui-parity.md](ui-parity.md) |
 | 22 | **Encoder efficiency** | HEVC / AV1 have no B-frames, multi-reference or SAO / CDEF; Opus no FEC / DTX; single-file intermediates are 8-bit uncompressed QuickTime only (#372 closed by #778: no 16-bpc, AVI or lossless-compressed codec); #325 render over existing file | Larger files than After Effects + Media Encoder | 20–40 h | G6 · [file-format-parity.md](file-format-parity.md) |
 | 23 | **Essential Graphics interchange** | Templates are `.ectemplate`, not `.mogrt`; #338 and #611 closed | Premiere editors can't use our templates | 15–30 h | — · [file-format-parity.md](file-format-parity.md) |
 | 24 | **Timeline depth requests** | #601 expand precomps in place, #602 reorderable render stack, #604 guide-only effects, #425 keyframe confusion (#355 and #428 closed) | Power-user speed | 15–30 h | G2 · [ui-parity.md](ui-parity.md) |

docs/ui-parity.md

@@ -22,7 +22,7 @@ feel and platform differences, and the 26.x interface changes are not in yet.
 | Tools panel | All After Effects tools; long-press flyouts; Tool Creates Shape / Mask; Fill / Stroke options | 80% | #213, #227 fixed; #553 (pen and vertex tools on motion paths) is closed |
 | Nudging and modifiers | Arrow nudge (1 px, Shift 10 px), Alt/Option duplicates and slips, Shift constrains | 75% | #290 nudging fixed; #491 (Linux multi-layer edits) is closed |
 | Numeric entry | Scrubbable values, typed entry with Tab / Shift+Tab, angle revolutions, Escape cancels, non-finite rejected | 85% | `ui_angles`, `ui_inline_edit` (#93, #141, #361); rename arrows on Linux (#488) |
-| Effect Controls | After Effects' twirl-downs, angle dial, point crosshair, eyedropper, curves/levels editors, effect menu on right-click | 70% | `ui_effect_controls`, `ui_fx_editors`; 26.5 rebuilt this panel with icon controls and effect colour labels: labels exist (a colour bar on the effect header, right-click Label menu, `effect.setLabel`; not in the Timeline), the rebuilt controls are not matched |
+| Effect Controls | After Effects' twirl-downs, angle dial, point crosshair, eyedropper, curves/levels editors, effect menu on right-click | 70% | `ui_effect_controls`, `ui_fx_editors`; 26.5 rebuilt this panel with icon controls and effect colour labels: labels exist (a colour bar on the effect header and on the effect's Timeline row, right-click Label menu, `effect.setLabel`), the rebuilt controls are not matched |
 | Context menus | Layer, property, Project, Timeline empty area, work area, labels with colours | 80% | `ui_blank_context_menus`, `ui_project_rows`; #227, #290, #407 fixed; a comp's Project row menu has Composition Settings… (#1058) |
 | Keyboard shortcuts | After Effects' defaults; Keyboard Shortcuts editor that rebinds and saves sets | 75% | Shortcut editor in Settings; #467 (adding shortcuts on Linux), #428 and #336 are closed; no shortcuts for scripts |
 | Drag and drop | Project → Timeline / viewer / New Comp / Render Queue; effects onto layers; files from the OS | 65% | `ui_drag_drop`; OS drops fail on Wayland (winit) and some Linux setups (#268); #552, #351 (multi-file drops) and #511 (crash dragging over the import dialog) are closed |