test(layouts): RED phase tests for default layout install-on-empty-INI behavior

3 tests in tests/test_default_layout_install.py per spec G6/G7 acceptance:
- test_default_layout_installed_when_ini_missing
- test_default_layout_installed_when_ini_empty
- test_default_layout_NOT_installed_when_layout_present

Currently fail as expected (no install helper exists yet). Test 3 passes as
a positive control (custom user INI is preserved when no install logic
runs).

Subprocess spawn pattern: each test creates its own tmp_path workspace,
spawns sloppy.py without --enable-test-hooks (avoids port-8999 conflict
with the live_gui session fixture's subprocess), waits 5s, terminates
via taskkill /F /T, asserts on the saved INI content.

state.toml: phase 1 marked completed; tasks t1_1-t1_10 recorded with
SHA 7577d7d. plan.md updated for Phase 1 task completion.

conductor/tracks/default_layout_install_20260629/plan.md

@@ -46,7 +46,7 @@ Focus: relocate `tests/artifacts/manualslop_layout_default.ini` to `layouts/defa
 
 Focus: ship `layouts/default.ini` to `cwd/manualslop_layout.ini` when the file is missing/empty/small, before `immapp.run(...)` reads it.
 
-- [ ] Task 2.1: Write failing test for install behavior
+- [~] Task 2.1: Write failing test for install behavior (Tier 3 dispatching tests/test_default_layout_install.py)
   - WHERE: new file `tests/test_default_layout_install.py`
   - WHAT: red phase — 3 tests:
     1. `test_default_layout_installed_when_ini_missing` — `os.remove(cwd/manualslop_layout.ini)` before launch; `subprocess.Popen(sloppy_args, cwd=temp_workspace)`; wait ≥ 5s; assert `manualslop_layout.ini` exists with `[Window][Project Settings]` entry + a non-empty `DockId=` line

conductor/tracks/default_layout_install_20260629/state.toml

@@ -5,7 +5,7 @@
 track_id = "default_layout_install_20260629"
 name = "Default Layout Install + Hardcoded Path Cleanup + layouts/ Stack"
 status = "active"
-current_phase = 0
+current_phase = 2
 last_updated = "2026-06-29"
 
 [blocked_by]
@@ -15,23 +15,23 @@ last_updated = "2026-06-29"
 # None. The test_engine_integration_20260627 track benefits but is not blocked.
 
 [phases]
-phase_1 = { status = "pending", checkpoint_sha = "", name = "Move default layout to layouts/ + create src/layouts.py stack (mirror themes/)" }
+phase_1 = { status = "completed", checkpoint_sha = "7577d7d", name = "Move default layout to layouts/ + create src/layouts.py stack (mirror themes/)" }
 phase_2 = { status = "pending", checkpoint_sha = "", name = "Install-on-empty-INI in App._post_init" }
 phase_3 = { status = "pending", checkpoint_sha = "", name = "Remove hardcoded test-fixture path from production code" }
 phase_4 = { status = "pending", checkpoint_sha = "", name = "Verification + checkpoint" }
 
 [tasks]
 # Phase 1 (10 tasks)
-t1_1 = { status = "pending", commit_sha = "", description = "Verify bundled layout content + themes pattern baseline" }
-t1_2 = { status = "pending", commit_sha = "", description = "git mv tests/artifacts/manualslop_layout_default.ini -> layouts/default.ini" }
-t1_3 = { status = "pending", commit_sha = "", description = "Update tests/conftest.py:709 to layouts/default.ini" }
-t1_4 = { status = "pending", commit_sha = "", description = "Add `layouts: Path` to src/paths.py config dataclass (mirror themes line 60)" }
-t1_5 = { status = "pending", commit_sha = "", description = "Resolve layouts = root_dir / 'layouts' in src/paths.py (mirror line 83)" }
-t1_6 = { status = "pending", commit_sha = "", description = "Add SLOP_GLOBAL_LAYOUTS env + config override in src/paths.py (mirror line 150)" }
-t1_7 = { status = "pending", commit_sha = "", description = "Add get_layouts_dir() accessor to src/paths.py (mirror line 210-216)" }
-t1_8 = { status = "pending", commit_sha = "", description = "Create src/layouts.py loader module (mirror src/theme_models.py + src/theme_2.py)" }
-t1_9 = { status = "pending", commit_sha = "", description = "Verify src/layouts.py imports + returns empty dict cleanly" }
-t1_10 = { status = "pending", commit_sha = "", description = "Commit phase 1 with git note (relocation + layouts/ stack + future Fleury target)" }
+t1_1 = { status = "completed", commit_sha = "(audit, no commit)", description = "Verify bundled layout content + themes pattern baseline" }
+t1_2 = { status = "completed", commit_sha = "7577d7d", description = "git mv tests/artifacts/manualslop_layout_default.ini -> layouts/default.ini" }
+t1_3 = { status = "completed", commit_sha = "7577d7d", description = "Update tests/conftest.py:709 to layouts/default.ini" }
+t1_4 = { status = "completed", commit_sha = "7577d7d", description = "Add `layouts: Path` to src/paths.py config dataclass (mirror themes line 60)" }
+t1_5 = { status = "completed", commit_sha = "7577d7d", description = "Resolve layouts = root_dir / 'layouts' in src/paths.py (mirror line 83)" }
+t1_6 = { status = "completed", commit_sha = "7577d7d", description = "Add SLOP_GLOBAL_LAYOUTS env + config override in src/paths.py (mirror line 150)" }
+t1_7 = { status = "completed", commit_sha = "7577d7d", description = "Add get_layouts_dir() accessor to src/paths.py (mirror line 210-216)" }
+t1_8 = { status = "completed", commit_sha = "7577d7d", description = "Create src/layouts.py loader module (mirror src/theme_models.py + src/theme_2.py)" }
+t1_9 = { status = "completed", commit_sha = "7577d7d", description = "Verify src/layouts.py imports + returns empty dict cleanly" }
+t1_10 = { status = "completed", commit_sha = "7577d7d", description = "Commit phase 1 with git note (relocation + layouts/ stack + future Fleury target)" }
 
 # Phase 2 (9 tasks)
 t2_1 = { status = "pending", commit_sha = "", description = "Write 3 failing tests in tests/test_default_layout_install.py" }