refactor(home-manager): refine CLI feature configurations

- Add direnv module with nix-direnv integration, replacing manual hook
- Disable starship's add_newline for more compact prompt
- Clean up comments across CLI features for better readability

home-manager/sajenim/features/cli/direnv.nix

@@ -0,0 +1,15 @@
+{
+  # Automatic environment variable management per-directory
+  programs.direnv = {
+    enable = true;
+
+    # Faster nix-shell integration with dependency caching
+    nix-direnv.enable = true;
+
+    # Hook into zsh
+    enableZshIntegration = true;
+
+    # Suppress logging output
+    silent = true;
+  };
+}

home-manager/sajenim/features/cli/starship.nix

@@ -3,13 +3,13 @@
     enable = true;
     enableZshIntegration = true;
     settings = {
-      # Left prompt: username@hostname directory git ♥
-      format = "$username$hostname$directory$git_branch$git_status$character";
+      add_newline = false;
 
-      # Right prompt: language indicators
+      # Prompt layout
+      format = "$username$hostname$directory$git_branch$git_status$character";
       right_format = "$c$direnv$haskell$bun$python$rust";
 
-      # Blue username
+      # Always show username
       username = {
         style_user = "blue";
         style_root = "red";
@@ -17,14 +17,14 @@
         show_always = true;
       };
 
-      # Blue @hostname
+      # Show hostname even when not over SSH
       hostname = {
         ssh_only = false;
         format = "[@$hostname]($style) ";
         style = "blue";
       };
 
-      # Cyan directory
+      # Full path, no truncation
       directory = {
         style = "cyan";
         format = "[$path]($style) ";
@@ -32,12 +32,10 @@
         truncate_to_repo = false;
       };
 
-      # Git branch (purple, no bold)
-      git_branch = {
-        style = "purple";
-      };
+      # Git configuration
+      git_branch.style = "purple";
 
-      # Git status with semantic colors (no bold, no brackets)
+      # Semantic colors for git status indicators
       git_status = {
         format = "$conflicted$stashed$deleted$renamed$modified$staged$untracked$ahead_behind";
         conflicted = "[=$count](red) ";
@@ -52,19 +50,14 @@
         deleted = "[✘$count](red) ";
       };
 
-      # Heart prompt character (red in insert mode, blue in normal mode)
+      # Vi-mode aware prompt character
       character = {
         success_symbol = "[♥](red)";
         error_symbol = "[♥](red)";
         vicmd_symbol = "[♥](blue)";
       };
 
-      # Language modules for right prompt (only configure non-defaults)
-
-      # Enable direnv (disabled by default)
       direnv.disabled = false;
-
-      # C, Python, Haskell, Bun, Rust: use defaults
     };
   };
 }

home-manager/sajenim/features/cli/zsh.nix

@@ -1,5 +1,6 @@
 {pkgs, ...}: {
   imports = [
+    ./direnv.nix
     ./starship.nix
   ];
 
@@ -47,7 +48,6 @@
 
     # Extra commands that should be added to '.zshrc'
     initContent = ''
-      eval "$(direnv hook zsh)"
       bindkey "^[[1;5C" forward-word
       bindkey "^[[1;5D" backward-word
       export PATH

nixos/fuchsia/configuration.nix

@@ -27,8 +27,6 @@
   # Configure programs
   programs = {
     zsh.enable = true;
-    # Load and unload environment variables
-    direnv.enable = true;
     # Android debug bridge: communicate with devices
     adb.enable = true;
   };

nixos/viridian/configuration.nix

@@ -37,8 +37,6 @@
   # Configure programs
   programs = {
     zsh.enable = true;
-    # Load and unload environment variables
-    direnv.enable = true;
   };
 
   # Manage linux containers