Hook WriteFormattedLogMessage to inject session marker before first combat log write

Instead of hooking EnableChatLogging or SignalEvent (which fire too late
or before the log file is open), hook WriteFormattedLogMessage directly.
On the first write to the combat log, prepend COMBATLOG_SESSION with the
player name resolved via the name cache. This guarantees the session
marker is the very first line in the file.

Also add World_HandleLogoutCleanup (0x491180) hook to reset per-session
state on real logout/disconnect (not /reload), and move remove_on_shutdown
cleanup from shutdownDetour to logoutDetour.

src/main.zig

@@ -780,6 +780,34 @@ fn engineInitDetour() callconv(sc) void {
     }
 }
 
+// =============================================================================
+// Hook: World_HandleLogoutCleanup (0x491180)
+// Fires on real character logout/disconnect only — NOT on /reload or map change.
+// =============================================================================
+
+var logout_hook: hook.Detour(fn () callconv(sc) void) = .{};
+
+fn logoutDetour() callconv(sc) void {
+    con.print("[weirdutils] World_HandleLogoutCleanup -- player logout\n");
+
+    // Reset per-session state — only on real logout/disconnect, not /reload.
+    if (build_opts.worldmarkers) markers.onShutdown();
+    if (build_opts.combatlog) combatlog.onShutdown();
+
+    // Clean up world objects BEFORE game teardown — modules with
+    // remove_on_shutdown must destroy while game systems are alive.
+    comptime var i = modules.len;
+    inline while (i > 0) {
+        i -= 1;
+        const m = modules[i];
+        if (m.remove_on_shutdown) {
+            if (m.remove) |rm| rm();
+        }
+    }
+
+    logout_hook.callOriginal(.{});
+}
+
 // =============================================================================
 // Hook: CGGameUI_Shutdown (0x490BD0)
 // =============================================================================
@@ -816,20 +844,9 @@ const modules = [_]ModuleHooks{
 };
 
 fn shutdownDetour() callconv(sc) void {
-    // Clear marker definitions on logout/exit (not on map change).
-    if (build_opts.worldmarkers) markers.onShutdown();
-
-    // Clean up world objects BEFORE game shutdown — atexit handlers run before
-    // DllMain so modules with remove_on_shutdown must destroy here.
-    comptime var i = modules.len;
-    inline while (i > 0) {
-        i -= 1;
-        const m = modules[i];
-        if (m.remove_on_shutdown) {
-            if (m.remove) |rm| rm();
-        }
-    }
-
+    con.print("[weirdutils] CGGameUI_Shutdown\n");
+    // Per-session resets and remove_on_shutdown cleanup live in logoutDetour
+    // (World_HandleLogoutCleanup) — fires on real logout/disconnect only, not /reload.
     shutdown_hook.callOriginal(.{});
 }
 
@@ -851,11 +868,13 @@ fn install() void {
 
     _ = load_addons_hook.attach(0x51F600, &loadAddonsDetour);
     _ = engine_init_hook.attach(0x46a400, &engineInitDetour);
+    _ = logout_hook.attach(0x491180, &logoutDetour);
     _ = shutdown_hook.attach(0x490BD0, &shutdownDetour);
 }
 
 fn uninstall() void {
     shutdown_hook.detach();
+    logout_hook.detach();
     engine_init_hook.detach();
 
     // Remove in reverse order