Testing: layout_title_branch.phpt — wire existing AOT fixture dir (#807, #784)

[PurHur]

Problem

#807 tracks a layout_partial_chain.phpt fixture for conditional partial includes in layout.php. On master, the directory already exists:

test/fixtures/aot/cases/layout_title_branch/
  entry.php    # Renderer::go() → include layout.php
  layout.php   # $_SERVER['SCRIPT_NAME'] ?? … + title-branch includes
  home.php / hello.php

There is no layout_title_branch.phpt driver file and no PHPUnit/AOT harness registration — the bisect cannot run in CI until wired.

Goal

1. Add test/fixtures/aot/cases/layout_title_branch.phpt (or rename dir to match AOT: layout partial chain fixture (conditional includes in layout.php, #784) #807 name — pick one canonical name)
2. Register in AOT fixture lint/execute list (same pattern as AOT: require-as-expression fixture (config.php return array pattern, #783) #806 require_return_config.phpt)
3. @group aot-link passes when layout branch includes emit partial markers

Implementation hints

Piece	File	Notes
PHPT	layout_title_branch.phpt	--ENV-- optional SCRIPT_NAME
Needles	home.php / hello.php	Distinct markers per partial
Harness	test/unit/IncludeLiteralTest.php or AOT fixture runner	Mirror #810
Parent	#784, #807, #764

Reproduce

./script/ci-local.sh --filter layout_title_branch
docker run --rm -v "$(pwd):/compiler" -w /compiler php-compiler:22.04-dev \
  ./script/ci-local.sh --filter layout_title_branch

Acceptance criteria

• PHPT listed in test/fixtures/aot/cases/ and discovered by existing AOT fixture driver
• Execute stdout contains partial marker for Home title branch
• When broken, skip/fail cites AOT: layout.php title-branch partial includes (second template tier, #764) #784 / AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764, not AOT: Native user-class object model for phpc build --project #568

Dependencies

• AOT: Green method_include_void.phpt and @group aot-link for void+include methods #739 ✅ — void method + single include baseline
• AOT: layout.php title-branch partial includes (second template tier, #764) #784 — integration in full MiniWebApp layout
• AOT: layout partial chain fixture (conditional includes in layout.php, #784) #807 — may close together when PHPT lands

Verification

Local/Docker only — not GitHub Actions.

Links

• examples/003-MiniWebApp/templates/layout.php
• Testing: MiniWebApp AOT unskip matrix after #568 (orchestrate #454 #485 #478 #610) #676 step 0b
• ROADMAP 🗺️ ROADMAP: Self-host + web-capable PHP subset (living) #78