feat: refactoring configuration with options to make it more modular

home/linux/desktop/base/fcitx5/classicui.conf

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+# Vertical Candidate List
+Vertical Candidate List=False
+# Use Per Screen DPI
+PerScreenDPI=True
+# Use mouse wheel to go to prev or next page
+WheelForPaging=True
+# Font
+Font="Sans 10"
+# Menu Font
+MenuFont="Sans 10"
+# Tray Font
+TrayFont="Sans Bold 10"
+# Tray Label Outline Color
+TrayOutlineColor=#000000
+# Tray Label Text Color
+TrayTextColor=#ffffff
+# Prefer Text Icon
+PreferTextIcon=False
+# Show Layout Name In Icon
+ShowLayoutNameInIcon=True
+# Use input method language to display text
+UseInputMethodLangaugeToDisplayText=True
+# Theme macchiato, frappe, latte, mocha
+Theme=catppuccin-mocha
+# Force font DPI on Wayland
+ForceWaylandDPI=0

home/linux/desktop/base/fcitx5/default.nix

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+{
+  pkgs,
+  nur-ryan4yin,
+  ...
+}: {
+  home.file.".local/share/fcitx5/themes".source = "${nur-ryan4yin.packages.${pkgs.system}.catppuccin-fcitx5}/src";
+
+  xdg.configFile = {
+    "fcitx5/profile" = {
+      source = ./profile;
+      # every time fcitx5 switch input method, it will modify ~/.config/fcitx5/profile,
+      # so we need to force replace it in every rebuild to avoid file conflict.
+      force = true;
+    };
+    "fcitx5/conf/classicui.conf".source = ./classicui.conf;
+  };
+
+  i18n.inputMethod = {
+    enabled = "fcitx5";
+    fcitx5.addons = with pkgs; [
+      # for flypy chinese input method
+      fcitx5-rime
+      # needed enable rime using configtool after installed
+      fcitx5-configtool
+      fcitx5-chinese-addons
+      # fcitx5-mozc    # japanese input method
+      fcitx5-gtk # gtk im module
+    ];
+  };
+}

home/linux/desktop/base/fcitx5/profile

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+[Groups/0]
+# Group Name
+Name=Other
+# Layout
+Default Layout=us
+# Default Input Method
+DefaultIM=rime
+
+[Groups/0/Items/0]
+# Name
+Name=rime
+# Layout
+Layout=
+
+[GroupOrder]
+0=Other
+