Match fake Frame user data ownership to the headset

docs/testing.md

@@ -157,3 +157,8 @@ fake-Frame library/process ownership. `tests/e2e/test_media_transfer.py` checks
 HTTP/SSH upload and library listing without pretending the fake renders VR.
 Real decode timings and captured stereo output are recorded in
 [vr-video.md](vr-video.md). Generated media only; no external player required.
+
+**Verified 2026-09-28**, real Frame BUILD_ID 20260925.6191901: `~/.local`
+and `~/.local/share` are `steamos:steamos`, mode 0755. The fake supervisor
+sets those parent owners too; previously its root-created Steam manifests
+left the parents root-owned and incorrectly prevented user runtime installs.

tests/fakeframe/rootfs/usr/local/lib/fakeframe/init.py

@@ -231,6 +231,12 @@ def sysfs(state):
 
 def runtimes(state):
     """Installed compat tools as Steam app manifests, and the Lepton launcher itself."""
+    # Verified 2026-09-28, BUILD_ID 20260925.6191901: both parents are
+    # steamos:steamos 0755. The root supervisor must not leave them root-owned
+    # when creating Steam's fake manifests; user-account app installs need them.
+    for directory in (HOME + '/.local', HOME + '/.local/share'):
+        os.makedirs(directory, mode=0o755, exist_ok=True)
+        chown(directory)
     apps = fs.STEAM_ROOT + '/steamapps'
     for alias, installed in state['runtimes'].items():
         acf = f'{apps}/appmanifest_{fs.RUNTIME_APPIDS[alias]}.acf'