add gemini-cli, mermaid-cli, update gitignore and mime apps

.gitignore

@@ -1,5 +1,7 @@
 blender/
+cake_wallet/
 cava/
+chromium/
 Code/
 composer/
 dconf/

home-manager/home.nix

@@ -70,11 +70,14 @@
     lazygit
     cargo-cross
     cargo-generate
-    claude-code
-    codex
     probe-rs-tools
     elf2uf2-rs
 
+    # AI development tools
+    claude-code
+    codex
+    gemini-cli
+
     # Internet & networking
     firefox-bin
     filezilla
@@ -95,6 +98,7 @@
 
     # Document processing
     tectonic
+    mermaid-cli
 
     # Theming
     pywal

mimeapps.list

@@ -6,6 +6,7 @@ image/png=org.gnome.Loupe.desktop;
 text/plain=org.gnome.TextEditor.desktop;
 image/heif=org.gnome.Loupe.desktop;
 application/pdf=org.pwmt.zathura-pdf-mupdf.desktop;
+application/zip=org.gnome.FileRoller.desktop;
 
 [Default Applications]
 text/markdown=org.gnome.TextEditor.desktop
@@ -15,3 +16,4 @@ text/plain=org.gnome.TextEditor.desktop
 image/heif=org.gnome.Loupe.desktop
 x-scheme-handler/discord-1216669957799018608=discord-1216669957799018608.desktop
 application/pdf=org.pwmt.zathura-pdf-mupdf.desktop
+application/zip=org.gnome.FileRoller.desktop