docs: note Android AVF ARM64 field report (refs #2364)

Add a narrow README note for the community ARM64 Android AVF field
report: Hermes Agent + WebUI running inside a Debian 12 VM on a
mid-range Android phone with cloud-hosted inference.

The note frames the report as a compatibility signal rather than an
official support baseline or provider/model benchmark, and records
practical mobile caveats around first-install compile time, Android
tab reloads, and battery optimization.

Refs #2364
Closes nesquena/hermes-webui#2483

Co-authored-by: Frank Song <franksong2702@gmail.com>

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Documentation
+
+- **PR #2483** by @franksong2702 (refs #2364) — Add a narrow README note for the community ARM64 Android AVF field report: Hermes Agent + WebUI running inside a Debian 12 VM on a mid-range Android phone with cloud-hosted inference. The note frames the report as a compatibility signal rather than an official support baseline or provider/model benchmark, and records practical mobile caveats around first-install compile time, Android tab reloads, and battery optimization.
+
+
 ## [v0.51.86] — 2026-05-17 — Release BJ (stage-379 — 4-PR review-bypass batch — memory-provider session lifecycle + cross-provider /model alias + RuntimeAdapter cancel seam + Fork-from-here messaging coord)
 
 ### Fixed

README.md

@@ -328,6 +328,22 @@ That's it. Traffic is encrypted end-to-end by WireGuard, and password auth
 protects the UI at the application level. You can add it to your home screen
 for an app-like experience.
 
+### Community field report: ARM64 Android via AVF
+
+A community report in [#2364](https://github.com/nesquena/hermes-webui/issues/2364)
+documents Hermes Agent + WebUI running on a mid-range ARM64 Android phone inside
+a Debian 12 VM via Android Virtualization Framework (AVF). The reported setup
+used a Xiaomi Redmi Note 13 Pro 4G, 3.8 GiB RAM allocated to the VM, 8 visible
+CPU cores, Chrome on Android at `localhost:8787`, and cloud-hosted inference.
+
+This is not an official support baseline or provider/model benchmark, but it is
+a useful compatibility signal for mobile ARM64 experiments: the WebUI rendered
+smoothly in Chrome, ARM64 Debian worked for the agent stack, and the total local
+footprint was about 1.7 GB. Practical caveats from the report: first install can
+take longer when dependencies compile from source, Android browser tabs may
+reload when switching apps, and disabling battery optimization for the terminal
+or VM host may be needed for longer-running sessions.
+
 > **Tip:** If using Docker, set `HERMES_WEBUI_HOST=0.0.0.0` in your
 > `docker-compose.yml` environment (already the default) and set
 > `HERMES_WEBUI_PASSWORD`.