[common/logging] Simplify logging logic and fix issues when logging before system is created (#3688)

- our logging code was bigger than spdlog itself, why???? just keep it simple
- fix issues when logging before logging system is even started
- removes the "initialized logging twice" issue
- removes uneeded indirection in file logging
- uses direct formatting instead of jumping hoopla-around the fmt::format() ressult
- code duplication and dead code removal as usual

I did explore dup2() but I think it's not worth the hassle
I did try `fwopen()` but it's better if things are just kept as-is.

there is a lot of noise because I removed a bunch of redundant files on logging and just put everything in one file

now normally this wouldn't be a good idea, however consider: the complexity of logging; it's less than 500 lines... does it really need a whole subsystem?!?!?! ITS JUST LOGGING

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3688
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: DraVee <chimera@dravee.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

3 files changed, 7 insertions, 4 deletions

diff --git a/src/network/network.cpp b/src/network/network.cpp
index 7d04c2241e..4946fcf3dd 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -1,10 +1,10 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 // SPDX-FileCopyrightText: Copyright 2017 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/assert.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "enet/enet.h"
 #include "network/network.h"
 
diff --git a/src/network/room.cpp b/src/network/room.cpp
index cf33763da2..7c257d2bd4 100644
--- a/src/network/room.cpp
+++ b/src/network/room.cpp
@@ -13,7 +13,7 @@
 #include <sstream>
 #include <thread>
 #include "common/polyfill_thread.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "enet/enet.h"
 #include "network/packet.h"
 #include "network/room.h"
diff --git a/src/network/verify_user.h b/src/network/verify_user.h
index 6fc64d8a3e..36aef5a817 100644
--- a/src/network/verify_user.h
+++ b/src/network/verify_user.h
@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <string>
-#include "common/logging/log.h"
+#include "common/logging.h"
 
 namespace Network::VerifyUser {