docs: add Standby branding and complete presentation session evidence

README.md

@@ -1,3 +1,7 @@
+<p align="center">
+  <img src="assets/brand/standby-mark.png" alt="Standby" width="150" />
+</p>
+
 # Standby
 
 **Execution capacity when you need it.**

assets/brand/README.md

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+# Standby Brand Assets
+
+Approved visual identity assets for Standby.
+
+## Identity
+
+```text
+Visual concept:
+    Protected Flow
+
+Visual personality:
+    Assured · Fluid · Precise
+
+Primary tagline:
+    Execution capacity when you need it.
+
+Technical descriptor:
+    Protocol-enforced future execution capacity from shared AMM liquidity.
+```
+
+## Palette direction
+
+```text
+Deep Blue
+Cyan
+Violet
+Dark navy ground
+Light primary text
+Muted secondary text
+```
+
+## Files
+
+```text
+standby-mark.png
+    approved ribbon-S project identity mark
+
+standby-title-reference.png
+    approved ETHOnline 2026 title-slide visual reference
+```
+
+## Asset status
+
+These are approved **raster presentation assets**.
+
+They are not canonical vector artwork and not final SVG geometry.
+
+## Mark interpretation
+
+The mark is a ribbon-form `S`. It must not be reinterpreted as:
+
+```text
+shield
+lock
+vault
+power / standby button
+coin
+custody / escrow
+dedicated reserve
+literal arrow
+```