Say which packages carry the manual, and that NFR-R8 is decided

distribution.md's list of what every channel must get right had the
face models as the one LFS trap. Since 0.15.0 (d8f26fb) the Arch
package, the Windows installer and the APK also carry the rendered
manual and its pictures, and refuse LFS pointers for the same reason;
the Flatpak manifest does not install it.

The Vulkan bullet still called NFR-R8 open. It was decided on
2026-09-19: no CPU pipeline, and a viewer on embedded previews with
develop and export withheld.

docs/dev/distribution.md

@@ -45,10 +45,11 @@ somewhere:
   `project_license` is GPL-3.0-or-later; those differ on purpose — see the
   comment in the file.
 - **Vulkan is a requirement, not a preference.** The develop pipeline is
-  compute shaders through wgpu, and NFR-R8 — how far a CPU fallback goes — is
-  still open, so today there is nothing behind it. A package that installs onto
-  a machine with no working ICD produces an application that starts and cannot
-  develop.
+  compute shaders through wgpu, and NFR-R8 was decided on 2026-09-19 against a
+  CPU pipeline: without a device the library, the grid and the judgements work
+  on embedded previews, and develop and export say they are unavailable. A
+  package that installs onto a machine with no working ICD produces an
+  application that starts and cannot develop.
 - **A Secret Service implementation, or an honest degraded mode.** FR-NC-2 is
   explicit that the absence of a secrets daemon is a stated degraded mode and
   never a silent fall back to plaintext. Packages express this as an optional
@@ -59,6 +60,12 @@ somewhere:
   the Flatpak manifest check the file size and refuse, because the alternative
   is a package whose face indexing fails inside the graph loader on a user's
   machine rather than on the packager's.
+- **So are the manual's pictures.** Since 0.15.0 the Arch package, the Windows
+  installer and the APK carry `docs/manual/index.html` and its `media/`, where
+  `dr_ui::manual` looks for them (`/usr/share/darkroom/manual`, `manual\` beside
+  `darkroom.exe`, the APK's `assets/manual`), and each refuses a pointer where a
+  picture should be — shipped, a pointer is a manual of broken images that
+  nothing reports. The Flatpak manifest does not install it yet.
 
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