Prepare the 0.10.0 release candidate

MEMORY.md

@@ -182,7 +182,7 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 - **Priority change (2026-11-02):** the map optimization, pre-build NPC revisit,
   0.9.3 UI polish, 0.9.4 NPC visual optimization, 0.9.5 texture/material pass and
   0.9.6 integration are complete and in `DONE.md`. 0.10.0 release-candidate work
-  is next. The source version is 0.9.6.
+  is next. The source version is 0.10.0-rc.1.
 - **Release/legal blockers (0.10.0 work, 2026-11-03):** macOS remains unsigned
   (quarantine instructions only); AI image provider terms/commercial rights and
   external storefront/rating approval are not cleared; external playtests and the