Fix release publishing and add a CI token fallback

Tag builds since v0.2.2 built all artifacts but never published a release:
- tools/publish_release.sh only assembled AUTH in the GITEA_TOKEN branch; the
  ~/.git-credentials branch set CRED and then used an unbound ${AUTH[@]} under
  `set -u`, so every API call failed and the job ended "could not create or find
  release". It now sets AUTH=(-u "$CRED").
- The repo has no GITEA_TOKEN secret and the runner has no git credentials, so the
  workflow now falls back to the built-in workflow token:
  GITEA_TOKEN: ${{ secrets.GITEA_TOKEN || github.token }}.

v0.2.9 was then built and published locally with all five artifacts (portable
Linux/Windows/macOS, NSIS installer, AppImage) and the release page verified via
the API. v0.2.4-v0.2.8 remain unpublished; they are superseded by the latest.

Docs
- docs/RELEASING.md records the incident and the local-publish fallback.
- TODO gains a release-pipeline follow-up (verify CI on the next tag).
- MEMORY notes the root cause, the missing secret, and which releases exist.
- Version 0.2.10.

tools/screen_designs.py

@@ -105,20 +105,20 @@ SCREENS = [
         "name": "targeting_npc",
         "kind": "scene",
         "title": "Targeting an NPC",
-        "source": "README screenshot 02 · ADR-0008 cone focus + head ring",
+        "source": "README screenshot 02 · ADR-0008 cone focus + focus circle",
         "ref": "02-targeting-npc.png",
-        "description": "An approaching NPC is in the focus cone: a thin pale-gold "
-                       "ring billboards around their head, a display name under "
-                       "the ring, and the HUD shows a target line with the "
-                       "interaction hint.",
+        "description": "An approaching NPC is in the focus cone: a blue "
+                       "semi-transparent circle in front of their face, a display "
+                       "name under the circle, and the HUD shows a target line "
+                       "with the interaction hint.",
         "prompt": (
             "Realistic 3D first-person game scene: a friendly pedestrian "
-            "standing on a city sidewalk, a thin pale-gold ring floating around "
-            "their head as a game selection marker, a small name label under the "
-            "ring, minimal HUD target text at the bottom, daytime"),
+            "standing on a city sidewalk, a blue semi-transparent circle in front "
+            "of their face as a game selection marker, a small name label under "
+            "the circle, minimal HUD target text at the bottom, daytime"),
         "regions": [
             (0.35, 0.15, 0.65, 0.60, "NPC in focus"),
-            (0.44, 0.10, 0.56, 0.16, "head ring"),
+            (0.44, 0.10, 0.56, 0.16, "face circle"),
             (0.05, 0.85, 0.95, 0.95, "HUD: name + hint"),
         ],
     },