docs: Campaign LA gate round 2 record — retail-UI product default + JPEG background decode

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/plans/2026-08-14-launcher-campaign.md

@@ -756,6 +756,42 @@ optional Path.IsPathFullyQualified hardening on the crash reporter's
 --data-dir fallback. Launcher 67/67, Launcher.Core 317/317. The §A–I
 connected script remains the open user gate.
 
+## Gate round 2 — 2026-08-15 (first live launcher→client flow)
+
+Two real defects, both root-caused and fixed:
+
+1. **`6e1c0967` — launcher-spawned clients had NO interface at all.**
+   `RetailUi` rode the dev env var `ACDREAM_RETAIL_UI`; `FromSessionConfig`
+   inherited the env parse; the launcher strips `ACDREAM_*` from children
+   (LA11 isolation). Product launches therefore got the dev default: world
+   rendering, zero UI — character screen included. Session-config launches
+   now force `RetailUi = true` (a session-config launch IS a product
+   launch); the env flag remains the dev-launch opt-in. Test-pinned with a
+   null env.
+2. **`9ce72925` — character-select screen rendered magenta background/
+   fills.** The screen's 800×600 root background (`0x06007576`) is
+   `PFID_CUSTOM_RAW_JPEG` — a complete JFIF stream retail hands to the
+   Intel JPEG Library (`RenderSurface::CreateFromSourceData @0x004440a0`),
+   with Width/Height legitimately 0 on disk. `SurfaceDecoder` had no JPEG
+   case AND a non-positive-dimension guard, so it fell silently to the
+   magenta placeholder; the listbox/ENTER fills are transparent, so one
+   broken background bled through as three symptoms. Fixed via
+   StbImageSharp (managed, Linux-safe; codec-library substitution per the
+   BCnEncoder precedent — no register row). BOTH silent traps now log once
+   per id (id-resolves-but-undecodable in `SurfaceDecoder`;
+   id-missing-from-DATs in `TextureCache`) — the existing magenta guard
+   only covered id-0. New installed-DAT sweep asserts every char-select
+   media id decodes non-magenta. Full suite 14,034 green.
+
+Session-orchestration facts this round: the machine gained PowerShell 7
+(winget, user-approved — the LA fixture tooling hard-requires it); an
+orphan feed server from the earlier session held port 43119 with stale
+fixture data (stopped); the launcher self-update bootstrap restart on a
+dev binary is EXPECTED (staged launcher update → exit → respawn).
+Observations still open for this round: the duplicated "versioned client
+is unavailable" status line (cosmetic), and verifying Create Character is
+disabled on the live screen.
+
 ## Ledger
 
 | Slice | Status | Commits | Review | Notes |