Logging in to an account with no characters lands on the empty character list, as in 1.12.1, instead of creating a Human Warrior (#457)

Logging in to an account or realm with no characters lands on the empty character list. Until now the login cycle created a male Human Warrior on the server, named `WOW_CHAR` or "One", on every login that found an empty roster, a typed one included and again after Change Realm.

- **The reference.** The client builds `CMSG_CHAR_CREATE` in one place, `0x5aac50`, reached only from the glue binding `CreateCharacter` (`0x4719e0` → `0x4711d0` → `0x46b290` → `0x5aac50`), which stock `CharacterCreate.lua` calls only from `CharacterCreate_Okay`. With an empty roster, stock `CharacterSelect.lua`'s `UpdateCharacterList` disables Enter World and Delete and shows Create New Character, which benilla's select screen already does.
- **The change.** The create-if-empty step is gone from the per-realm cycle, and `NetConfig`, which existed only for it, goes with it. The create screen's own path is untouched.
- **Scripted runs.** `WOW_CHAR` must now be on the account: a driverless run whose `WOW_CHAR` is missing fails at select, as it already did on a non-empty roster, and a player's run shows the list. `docs/CONTRIBUTING.md` says so, and names `WOW_PROBE_CHARCREATE` as the explicit way to make one.

Checked: `an_empty_account_parks_at_select_without_creating_a_character` drives the real login cycle against a fake realmd (the server half of SRP6) and a fake world server answering an empty roster. It fails with the old step restored (the client sends `CMSG_CHAR_CREATE` on its own) and passes without it. Live against a local vmangos on a fresh account with no characters: before, the server gained a level-1 "One"; after, the client parks on the empty list and the account still holds no character. With a `WOW_CHAR` not on the account, a driverless run exits at select, and nothing is created. Gates and the smoke run green on macOS; no platform seam touched.

Fixes #343

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/CONTRIBUTING.md

@@ -73,8 +73,10 @@ out of scope is closed with the reason.
   `localhost:3724`). A scripted run has no default account: `WOW_USER`, `WOW_PASS` and
   `WOW_CHAR` name a test account on your server whose login kicks nobody, all three, either in
   the environment or in a `.probe-identity` file at the repo root (one per line, never
-  committed), and `scripts/smoke.sh` (the live login gate) refuses without them. The probes
-  drive the body with GM commands, so give that account the top GM level.
+  committed), and `scripts/smoke.sh` (the live login gate) refuses without them. `WOW_CHAR`
+  must already be on the account, since the client creates a character only when asked:
+  `WOW_PROBE_CHARCREATE=<name> WOW_PROBE_CHARCREATE_KEEP=1`, run without `WOW_CHAR`, makes it.
+  The probes drive the body with GM commands, so give that account the top GM level.
 - **Running it unattended.** The rules are `docs/METHOD.md`, "The local server"; these are the
   switches.
   - `WOW_UNATTENDED=1` reconnects instead of waiting at a dialog, and exits non-zero on a login

docs/MAP.md

@@ -182,7 +182,7 @@
 - `WOW_CAPTURE_STABLE` — benilla-app/src/capture/mod.rs
 - `WOW_CAPTURE_UI` — benilla-app/src/capture/scenarios.rs, benilla-app/src/ui_script/mod.rs, benilla-app/src/video.rs
 - `WOW_CAST_TRACE` — benilla-app/src/net.rs
-- `WOW_CHAR` — benilla-app/src/capture/probe_mail.rs, benilla-app/src/char_select/mod.rs, benilla-app/src/cvars.rs, benilla-app/src/login/mod.rs, benilla-app/src/net.rs, benilla-app/src/net/io.rs, benilla-app/src/realm_select/smoke.rs, benilla-app/src/run_mode.rs
+- `WOW_CHAR` — benilla-app/src/capture/probe_mail.rs, benilla-app/src/char_select/mod.rs, benilla-app/src/cvars.rs, benilla-app/src/login/mod.rs, benilla-app/src/net.rs, benilla-app/src/realm_select/smoke.rs, benilla-app/src/run_mode.rs
 - `WOW_CHARCREATE_DIALS` — benilla-app/src/char_create/mod.rs
 - `WOW_CHARCREATE_NAME` — benilla-app/src/char_create/mod.rs
 - `WOW_CHARCREATE_PICK` — benilla-app/src/capture/mod.rs, benilla-app/src/char_create/mod.rs