Echo area appears white until used for the first time

[arcensyl]

Describe the bug
When opening Nyxt (Electron) while using a non-default theme, the echo area will appear to be white until it is used for the first time. For example, if you run nyxt-init-time, the echo area will color itself when displaying the message echoed by it. This might be related to my previous issue (#3619); I'm not sure. As I experience both, I have to toggle the fullscreen state before echoing an empty string to color in the echo area.

Precise recipe to reproduce the issue
Upon starting Nyxt with the minimal config listed below, you should notice that the echo area is not colored to match the rest of the UI. If you echo anything, even an empty string, the message will display and the echo area will immediately color itself in.

Minimal config
This configuration is enough to showcase the issue.

(in-package #:nyxt-user)

(define-configuration browser
  ((theme theme:+dark-theme+)))

Workaround
I found a workaround that people can use until this problem is properly fixed. You can add this code to your configuration to have Nyxt echo an empty string and update the echo area. If you're also experiencing issue #3619, then you will need to combine its workaround with this so that Nyxt toggles its fullscreen state beforehand.

(define-configuration browser
  ((window-make-hook
	(hooks:add-hook %slot-value% (lambda (_) 
          (echo "")))))

Information

• OS: Linux, 6.12.16
• Distribution: NixOS, 25.05 (Warbler)
• Graphics card: AMD Radeon RX 7900 XT
• Window manager: Hyprland, 0.47.2
• Installation method: Flatpak
• Output of nyxt --system-information:

Nyxt version: 4
Web Renderer: Electron
OS: Linux 6.12.16
Lisp implementation: SBCL 2.4.10 (Dynamic space: 3072MB)
ASDF version: 3.3.1
Features: (:NYXT-ELECTRON :NYXT-4 :CLIPBOARD-CONTENT-METHOD :SWANK :SLYNK :PARENSCRIPT
 :NSYMBOLS :FSET-EXT-STRINGS :SBCL+SAFE-STANDARD-READTABLE :NAMED-READTABLES
 :FLATPAK :GLOBAL-VARS :LPARALLEL :21BIT-CHARS :PLUMP-UTF-32 :CLOSER-MOP
 :CL-PPCRE-UNICODE :CL-UNICODE :CL-JSON-DOUBLE-FLOAT-IS-SUBSUMED
 :CL-JSON-SINGLE-FLOAT-IS-SUBSUMED :CHUNGA :FLEXI-STREAMS :CL-PPCRE
 :BORDEAUX-THREADS :LPARALLEL.WITH-CLTL2 :LPARALLEL.WITH-CAS
 :LPARALLEL.WITH-STEALING-SCHEDULER :SPLIT-SEQUENCE
 CFFI-FEATURES:FLAT-NAMESPACE CFFI-FEATURES:X86-64 CFFI-FEATURES:UNIX :CFFI
 CFFI-SYS::FLAT-NAMESPACE ALEXANDRIA::SEQUENCE-EMPTYP :FAST-IO-SV :FAST-IO
 :CL-JSON-CLOS :CL-JSON :SBCL-USES-SB-ROTATE-BYTE CHIPZ-SYSTEM:GRAY-STREAMS
 :THREAD-SUPPORT :ASDF3.3 :ASDF3.2 :ASDF3.1 :ASDF3 :ASDF2 :ASDF :OS-UNIX
 :NON-BASE-CHARS-EXIST-P :ASDF-UNICODE :ARENA-ALLOCATOR :X86-64 :GENCGC :64-BIT
 :ANSI-CL :COMMON-LISP :ELF :IEEE-FLOATING-POINT :LINUX :LITTLE-ENDIAN
 :PACKAGE-LOCAL-NICKNAMES :SB-LDB :SB-PACKAGE-LOCKS :SB-THREAD :SB-UNICODE
 :SBCL :UNIX)

Output when started from a shell
I made a file containing both STDOUT and STDERR. I'm attaching it instead of just copying its contents because it is so long.
nyxt_debug_output.txt