task-43: what landed, and where the unmerged capture tree actually is

docs/tasks/43-viewtop-compositor.md

@@ -92,10 +92,36 @@ two-client handoff on hardware including adoption. Step 3's DRM/KMS half is
 done and running; the arm64 engine is not. Step 4 is untouched.
 
 The live list is in `souveraine-viewtop/docs/SESSION-2026-08-02.md` §"What is
-missing". Shortest form, by what blocks daily use: scaling (everything renders
-tiny), screen capture (written, unmerged), `furniture_at` returning `None` (the
-pill cannot be addressed), and no `ToCompositor` dispatch (the OSK and pill
-hacks cannot be deleted until there is one).
+missing" — read its second-pass section, which is what changed after `bb09206`.
+
+**Done since:** scaling (scale 2, 540x1080 logical, derived from the panel's own
+62x124 mm), the layer `arrange()` that never ran on commit (centred sidebars),
+toplevels sized to the non-exclusive zone rather than the whole panel, hardware
+buttons reaching sessiond's `button` verb, keyboard reaching the seat, panel
+DPMS with the EBUSY deferral (`power.rs`), a control socket (`control.rs`), and
+`zwlr_foreign_toplevel_management_v1` so the dock and overview can finally
+enumerate windows.
+
+**Shortest form of what is left, by what blocks daily use:**
+
+1. **Windows pile on each other.** Every toplevel is configured to the same
+   rectangle with nothing to tell them apart. "Multiple apps at once" needs
+   placement and a focus border, not more protocol — the enumeration half is
+   done now.
+2. **Screen capture is still unmerged, and it is worth doing next** because
+   without it nothing visual can be verified: no screenshots means every UI
+   change ships unverified. It is **not** lost — it is a whole viewtop tree on
+   archdev at `~/vt-capture` (`ext-image-copy-capture-v1` +
+   `ext-output-image-capture-source-manager-v1`, `ImageCopyCaptureHandler` at
+   `wayland.rs:1816`, helpers `capture_peer`/`copy_output_into`/`render_capture`
+   around `676-850`). `gate.rs`'s `Act::Capture` half is **already merged** into
+   the current tree, so the port is the handler and its helpers only. It renders
+   the scene a second time off-screen rather than reading the scanout buffer,
+   and the reason is worth keeping: handing a client a mapping of the swapchain
+   also hands it whatever the next frame reuses.
+3. `furniture_at` still returns `None`, so `Route::Shell` is unreachable.
+4. Nothing dispatches `ToCompositor` — but `control.rs` is now the socket it
+   lands on, which was the missing half.
 
 ## The original plan, for context