CLAUDE.md: document eaa5fd3 through 5.1.0b-in-progress work

- MFD mode 4 right-device stagger fix (eaa5fd3): cycle diagram, files touched
- Linux→Windows rsync workflow: sync-to-windows.sh (55b9bfc5)
- ddraw.dll removed from repo; build-resources.ps1 moves it aside (0ceba9c7, 24825ff3)
- ConLobby V5.1.0b1 / Super6 6-mech rotation from Highlight (c768f7c4)
- CRIOMAIN.CPP Korean translation + RIO poll timeout scaling; CRLF hazard note;
  min/max undeclared in VC6 in this TU (16fca6c4, a712002f)
- 16 pilots + 1 cameraship: NetworkMaxPlayers formula, fall-through break warning (f76dc05f)

CLAUDE.md

@@ -795,6 +795,75 @@ keeping old-RIO (type 0) protocol behavior byte-identical:
   alongside `mw4print.exe`.
 - Version bumped to **2.0**, copyright year updated to **2026**.
 
+## 📋 MFD mode 4: right device stagger fix (2026-07-18, eaa5fd3)
+Root cause: `CMFD_Device::BeginScene()` cleared BOTH MFD device back-buffers at `sh_step==0`.
+But in mode 4 the right MFD flip also fires at `sh_step==1` (= old `sh_step==0` after the
+stagger increment), so it presented a just-cleared buffer — only the grid, no channel data.
+
+Fix: `BeginScene()` now only clears/grids the LEFT device at `sh_step==0`. New `BeginSceneRight()`
+(added to `render.cpp` / `render.hpp`, called from `WinMain.cpp`) clears/grids the RIGHT device at
+`sh_step==1` — one frame AFTER the right flip — so channels 3–4 render into a fresh buffer before
+the next flip. Mode 1 is unchanged.
+
+Mode 4 cycle (with stagger):
+- `sh_step 0`: radar + left `BeginScene` (clear + grid); no flip
+- `sh_step 1`: flip right MFD (shows channels 3–4 from previous cycle) + right `BeginScene` (clear + grid)
+- `sh_step 2–4`: channels 0–2 → left device
+- `sh_step 5–6`: channels 3–4 → right device
+- `sh_step 0` (next): flip radar + left MFD (shows channels 0–2 from previous cycle)
+
+Files: `CoreTech/Libraries/GameOS/WinMain.cpp`, `render.cpp`, `render.hpp`.
+
+## 📋 Linux→Windows development workflow (2026-07-19, 55b9bfc5)
+`build-env/sync-to-windows.sh` — rsync script that pushes all source, content, toolchain, and
+assets to the Windows build machine at `/vwe/firestorm`. Excludes generated build outputs
+(`rel.bin/`, `dbg.bin/`, `*.mw4`, `*.dep`), `.git`/LFS objects, `_UNUSED/`, and the game deploy
+dir (`MW4/`). Run from Linux before triggering a Windows build.
+
+## 📋 ddraw.dll removed from repo; build script moves it aside (2026-07-19, 0ceba9c7, 24825ff3)
+`Gameleap/mw4/ddraw.dll` (DDrawCompat) removed from git (was LFS-tracked); now lives as
+`ddraw.dll.old` in the same dir for reference. `deploy-editor.ps1` installs DDrawCompat as
+`ddraw.dll` at deploy time (the editor needs it for its windowed D3D7 viewport).
+`build-resources.ps1` moves `ddraw.dll` aside (`.buildaside`) before running `MW4pro.exe`
+because **DDrawCompat is fatal to MW4pro.exe in BOTH windowed and fullscreen modes**, then
+restores it in `finally`. The same block also defensively covers dgVoodoo2 interceptors
+(`D3D8/D3D9/D3DImm.dll`) in case they reappear.
+
+## 📋 Branch `5.1.0b-in-progress`: multiplayer + RIO + source cleanup (2026-07-19)
+
+### ConLobby V5.1.0b1 — Super6 mech rotation (c768f7c4)
+Changes from Buddy 'Highlight' Taylor (MCHL), merged manually:
+- Console version string bumped to **V5.1.0b1**.
+- `ROOKIEMECH` defines expanded from 4 → **6 mechs**: added Archer (ID=1) and Warhammer (ID=62).
+- 16-slot default assignments cycle through all 6 Super6 mechs.
+- Right-click randomizer expanded from `random(0,3)` → `random(0,5)`.
+
+### CRIOMAIN.CPP — Korean translation + RIO poll timeout scaling (16fca6c4, a712002f)
+- Translated all EUC-KR/CP949 Korean developer comments (~35 lines) to English. File re-saved
+  as clean UTF-8. CRLF line endings preserved (`* -text` in `.gitattributes`).
+  ⚠️ **Encoding hazard:** always read/write CRIOMAIN.CPP as binary (or with an explicit encoding
+  codec). Python text-mode `readlines()` silently strips `\r`, causing a 3000+-line git diff when
+  every line's `\r\n` becomes `\n`. If that happens, restore CRLF with `re.sub(b'(?<!\r)\n', b'\r\n', data)` in binary mode, then amend the commit.
+- Added **`g_dwRIOPollTimeout`** global (default 50 ms). Computed in `SetupConnection` before the
+  receive loop using: `clamp(⌈480000/baud⌉, 5, 50)`. Preserves 50 ms at 9600 baud; floors at
+  5 ms for 115200 baud. Implemented with explicit ternary — **`min`/`max` are undeclared in this
+  translation unit under VC6** (not pulled in by CRIOMAIN's includes); use ternary or `__min`/`__max`.
+
+### 16 pilots + 1 cameraship in multiplayer (f76dc05f)
+`MW4Shell.cpp`:
+- `CTCL_DefaultHostSetup` (non-coop): `Environment.NetworkMaxPlayers` set to
+  `params->m_maxPlayers + (CTCL_GetTeslaCountAll() - CTCL_GetTeslaCount())`.
+  The delta = camera-only seats (Tesla seats not assigned to pilots), reserving one extra
+  DirectPlay slot per cameraship so the 17th connection isn't rejected.
+- `SetNetworkMissionParamater / PLAYER_LIMIT_PARAMETER`: same formula applied at runtime when
+  host changes the player limit. `gos_NetServerCommands(gos_Commend_UpdateMaxPlayers)` still called;
+  `break` must be present in this case (was accidentally dropped once — fall-through to
+  `JOIN_IN_PROGRESS_PARAMETER` corrupts `m_joinInProgress`).
+- COOP branch unchanged (capped at 9+bots; no camera seat needed there).
+
+`ConLobby.script`: launch guard `nTempPlayerCount > 16` raised to `> 17` so the cameraship
+connection doesn't trigger "Too many player/bots".
+
 ## Next steps (proposed)
 - [x] ~~Windowed 3D viewport on Win11~~ — DONE via DDrawCompat (see STEP 8 viewport section).
 - [ ] (Optional) Curate remaining WIP content as features are exercised (editor loads dev `Content\`).