v4.2.1: plain-language game copy and a balance fetch on login

The lobby and every game screen now speak to a player, not an operator: each game has one how-to sentence, and the table headers, limits, RTP, paytable and server-timing notes are gone. The account and balance are fetched whenever a session signs in, including stored-credential auto-login, so the header is filled before the lobby appears.

8 files changed, 8 insertions, 4 deletions

diff --git a/docs/GUI-PLAN.md b/docs/GUI-PLAN.md
index 4279626..89cf495 100644
--- a/docs/GUI-PLAN.md
+++ b/docs/GUI-PLAN.md
@@ -130,6 +130,9 @@ they show the same layout with the real session and the pinned action bars.
 - Sidebars pin their action block below the content, so SPIN, CLEAR, DEAL and
   START never move as the bet slip or a hand grows. The embedded fonts have no
   suit or arrow glyphs, so suits are shapes and navigation uses plain words.
+- The lobby and the game screens speak plain language: one how-to sentence per
+  game, no RTP, table limits, deck rules or server-timing jargon. The account
+  and balance are fetched as soon as a session signs in.
 - The header balance is held at the staked amount while the reels or wheel
   turn, then jumps to the settled value: the GUI never reveals a payout before
   the animation does. Refused spins cancel the animation and show the error.
@@ -152,8 +155,8 @@ Measured on Linux at 1080p with llvmpipe software GL:
 | --- | --- |
 | Linux binary | 8.3 MB |
 | Windows x86_64 binary | 6.8 MB |
-| Cold start to window | 61 ms |
-| Idle RSS | 131 MB |
+| Cold start to window | 72 ms |
+| Idle RSS | 130 MB |
 | Idle CPU | 0% |
 
 **Gate:** the screenshot set is ready for review. Remaining for the gate:
diff --git a/docs/TESTING.md b/docs/TESTING.md
index 817cb3d..613cd08 100644
--- a/docs/TESTING.md
+++ b/docs/TESTING.md
@@ -126,8 +126,9 @@ terminal client; a saved login from one signs in the other.
 2. First contact: the fingerprint modal appears before any credentials. Cancel
    leaves the connect screen; Trust continues to the login screen.
 3. Register, then log in with "Remember this login". The lobby shows the host,
-   ping, account, balance and the four games; quit and reconnect: the stored
-   login signs in without asking.
+   ping, account, balance and the four games; the balance fills in immediately
+   without entering a game. Quit and reconnect: the stored login signs in
+   without asking.
 4. Each game: place a bet or deal, play a round, and confirm the balance and the
    header update. Slots shows reels and win lines; roulette spins the wheel and
    reports the payout; blackjack draws suits and settles; crash draws a smooth
diff --git a/docs/screenshots/gui-blackjack-1080p.png b/docs/screenshots/gui-blackjack-1080p.png
index b0fcc19..361f987 100644
--- a/docs/screenshots/gui-blackjack-1080p.png
+++ b/docs/screenshots/gui-blackjack-1080p.png
diff --git a/docs/screenshots/gui-crash-1080p.png b/docs/screenshots/gui-crash-1080p.png
index 245a3a1..da72f1f 100644
--- a/docs/screenshots/gui-crash-1080p.png
+++ b/docs/screenshots/gui-crash-1080p.png
diff --git a/docs/screenshots/gui-lobby-1080p.png b/docs/screenshots/gui-lobby-1080p.png
index a258967..8bfe8c8 100644
--- a/docs/screenshots/gui-lobby-1080p.png
+++ b/docs/screenshots/gui-lobby-1080p.png
diff --git a/docs/screenshots/gui-roulette-1080p.png b/docs/screenshots/gui-roulette-1080p.png
index 1d7af3d..703ea57 100644
--- a/docs/screenshots/gui-roulette-1080p.png
+++ b/docs/screenshots/gui-roulette-1080p.png
diff --git a/docs/screenshots/gui-roulette-result-1080p.png b/docs/screenshots/gui-roulette-result-1080p.png
index fe4c9cd..c1ffa63 100644
--- a/docs/screenshots/gui-roulette-result-1080p.png
+++ b/docs/screenshots/gui-roulette-result-1080p.png
diff --git a/docs/screenshots/gui-slots-1080p.png b/docs/screenshots/gui-slots-1080p.png
index 9d79321..0982114 100644
--- a/docs/screenshots/gui-slots-1080p.png
+++ b/docs/screenshots/gui-slots-1080p.png