ui: fix dark welcome artwork

closes #44

docs/design/dist/README.md

@@ -3,7 +3,7 @@
 ```
 Status: Current
 Owner: _null
-Last reviewed: 2026-08-18
+Last reviewed: 2026-08-20
 Governs: docs/design/dist/** — the onboarding illustration set and what it is for
 Review trigger: Any illustration added or replaced here; the onboarding artwork
                 in issue #29 landing in the app
@@ -71,6 +71,10 @@ to reintroduce by regenerating carelessly:
   estimate". A later draft named the correct fields but painted *Confidence —
   Low* permanently, which is wrong for anyone with a settled cycle. Naming
   nothing is the only version that cannot contradict the live forecast.
+- **`01_Welcome` is overlapping cycle rings in both themes.** Dark `01` once
+  drifted into the forecast vocabulary — calendar, dashed predicted days and an
+  arrow — while light `01` stayed correct. Judge any future replacement against
+  light `01`, not dark `07`.
 - **The dark set is a real dark composition**, not the light one dimmed — the
   midnight-plum ground `BRAND_GUIDE.md` §22 specifies.
 

docs/history/DEVELOPMENT_LOG.md

@@ -32,6 +32,32 @@ written and stay true. It is exempt from review for the same reason a receipt is
 
 ## Entries
 
+### 2026-08-20 — Dark welcome artwork corrected
+
+Issue #44 is fixed in the artwork set and in the shipping drawables. The dark
+welcome source now matches the light welcome subject: overlapping translucent
+cycle rings over the night landscape, with a crescent moon, botanicals and no
+calendar, arrow, dashed forecast days, text or step badge. Only `01_Welcome` was
+changed; dark `07_Forecast` stayed as the forecast scene.
+
+The corrected source is
+`docs/design/dist/Dark/01_WelcomeIllustration_dark.webp`, and the four
+`drawable-night-*dpi/art_welcome.webp` variants were regenerated from it at the
+existing bucket sizes. The owning dist README was reviewed in the same change
+and now records the trap: future replacements should judge dark `01` against
+light `01`, not dark `07`.
+
+**What this proved:** visual inspection of the corrected source; `identify`
+confirmed `2048x1365` for the source and `617x411`, `822x548`, `1233x822`,
+`1644x1096` for the night buckets; a SHA-256 check reported all 16 source WebPs
+unique; `./gradlew checkThemedDrawables` passed; `./gradlew assembleDebug`
+passed.
+
+**Next action:** work issue #32, the Play Store listing assets, then finish #31's
+neutral incognito launcher label/icon against that final asset direction.
+
+**Blockers:** none.
+
 ### 2026-08-19 (later) — Batch 06 closed, and four guards that can now fail
 
 Export, the privacy promise, the themed-drawable guard and the notification icon