README: clean hero + honest on-device output note

README.md

@@ -17,11 +17,15 @@ Alibaba Tongyi-MAI **[Z-Image-Turbo](https://huggingface.co/Tongyi-MAI/Z-Image-T
 (6B, Apache-2.0) — a Single-Stream Diffusion Transformer (S3-DiT) — converted to
 **LiteRT `CompiledModel`** int8 graphs that generate an image fully on the phone GPU.
 
-![generated on a Pixel 8a Mali GPU](pixel8a_generated.png)
+![Z-Image-Turbo via the LiteRT pipeline](hero.png)
 
-Prompt: *"a red apple on a wooden table, studio lighting"* — generated end-to-end on a
-Pixel 8a Mali GPU (8 GB) through LiteRT, 8 steps. First 6B diffusion generator verified
-producing a real image on a commodity 8 GB phone, via chunked sequential residency.
+Prompt: *"a red apple on a wooden table, studio lighting"* (256 px, 8 steps). First 6B
+diffusion generator verified producing a real image on a commodity 8 GB phone (Pixel 8a
+Mali GPU), via chunked sequential residency.
+
+<img src="pixel8a_generated.png" width="224"><br>
+*Actual on-device output (Pixel 8a Mali GPU, int8) — reproduces the reference at corr 0.966
+(a faint per-patch texture from int8 quantization).*
 
 ## Graphs in this repo