Use inline powershell launcher, add unicode support for batch

bin/tpl/trilium-safe-mode.bat

@@ -1,5 +1,23 @@
+@echo off
+:: Try to get powershell to launch Trilium since it deals with UTF-8 characters in current path
+:: If there's no powershell available, fallback to unicode enabled command interpreter
+
+WHERE powershell.exe > NUL 2>&1
+IF %ERRORLEVEL% NEQ 0 GOTO BATCH ELSE GOTO POWERSHELL
+
+:POWERSHELL
+powershell -ExecutionPolicy Bypass -NonInteractive -NoLogo "Set-Item -Path Env:TRILIUM_SAFE_MODE -Value 1; ./trilium.exe --disable-gpu"
+GOTO END
+
+:BATCH
+:: Make sure we support UTF-8 characters
+chcp 65001
+
+:: Get Current Trilium executable directory and compute data directory
 SET DIR=%~dp0
 SET TRILIUM_SAFE_MODE=1
 cd %DIR%
-WHERE powershell.exe
-IF %ERRORLEVEL% NEQ 0 (start trilium.exe --disable-gpu) ELSE (powershell.exe ./trilium-safe-mode.ps1)
+start trilium.exe --disable-gpu
+GOTO END
+
+:END