Command line export of ODB++ silently fails.

Description

Exporting ODB++ from the command line with an --output file silently fails because the code path checks for an existing file and exits if the file already exists. When exporting from the ODB++ export dialog, the user is given an opportunity to delete file which the command line does not. The expectation is that the ODB++ export behave like the other CLI commands and overwrite the output file.

Steps to reproduce

1. Run the kicad-cli pcb export odb --output=project.odb ./project.kicad_pcb where project is the name of a valid project.
2. Copy the ODB++ file to a different name.
3. Run KiCad and modify the project.kicad_pcb file.
4. Save the changes to the board file and close KiCad.
5. Repeat step 1.
6. Open project.odb and the copied ODB++ file in step 2 in a binary diff tool.
7. Observe the files are identical indicating that project.odb has not been updated.
8. Close the binary diff tool.
9. Delete the project.odb file.
10. Repeat step 1.
11. Repeat step 6 and observe the files are now different.

KiCad Version

Application: KiCad x86_64 on x86_64

Version: 9.0.7-250-gc1e9e95849, debug build

Libraries:
	wxWidgets 3.2.8
	FreeType 2.13.3
	HarfBuzz 10.2.0
	FontConfig 2.15.0
	libcurl/8.14.1 OpenSSL/3.5.3 zlib/1.3.1 brotli/1.1.0 zstd/1.5.7 libidn2/2.3.8 libpsl/0.21.2 libssh2/1.11.1 nghttp2/1.64.0 librtmp/2.3 OpenLDAP/2.6.10

Platform: Ubuntu 25.10, 64 bit, Little endian, wxGTK, X11, ubuntu, wayland

Build Info:
	Date: Feb 18 2026 07:58:59
	wxWidgets: 3.2.8 (wchar_t,wx containers) GTK+ 3.24
	Boost: 1.88.0
	OCC: 7.8.1
	Curl: 8.14.1
	ngspice: 44.2
	Compiler: GCC 15.2.0 with C++ ABI 1020

Build settings:
	KICAD_IPC_API=ON
	KICAD_STDLIB_DEBUG=OFF
	KICAD_STDLIB_LIGHT_DEBUG=OFF
	KICAD_SANITIZE_ADDRESS=OFF
	KICAD_SANITIZE_THREADS=OFF

Locale: 
	Lang: en_US
	Enc: UTF-8
	Num: 1,234.5
	Encoded кΩ丈: D0BACEA9E4B888 (sys), D0BACEA9E4B888 (utf8)