#446 chunk A: Scaffolding + paint-only surfaces (no hit-test)

[JDonaghy]

Sub-task of #446 — Migrate GTK draw wiring to ScreenLayout::draw()

Scope (chunk 1 of 4): Scaffolding + paint-only surfaces

Establish the ScreenLayout::draw() scaffolding in the GTK draw path and migrate surfaces that only need paint (no cached layout for click dispatch).

Surfaces:

• Wildmenu (debug the paint regression from the first attempt — may be a frame scope issue)
• Global status bar (paints correctly — verify no click dispatch depends on it)
• Activity bar (hit-test appeared to work in the first attempt)

What to do:

1. Build a quadraui::ScreenLayout in the GTK draw closure
2. Push these surfaces as Surface::X entries
3. Call frame.draw(b) for them
4. Cache the FrameHitMap (even if not consumed yet — establishes the pattern)
5. Revert any broken tab bar / breadcrumb / status bar migrations from the first attempt

Branch: issue-446-screen-layout-draw (existing, has WIP commit 0803fcd to cherry-pick from or revert selectively)

Must leave develop green. Every surface that migrates must pass smoke test.

Depends on

• Nothing — can start immediately

Related

• Parent: Migrate GTK draw wiring to quadraui ScreenLayout::draw() #446
• Next chunk: #446 chunk A: Scaffolding + paint-only surfaces (no hit-test) #460 (hit-test surfaces, blocked on quadraui#211)

[JDonaghy]

Remaining surfaces absorbed by chunks B–D (#461, #462, #463). Closing.