feat(neovim): add vim-fugitive for Git integration

Enables interactive status, commits, push/pull, and file diffs
via <leader>g{s,c,p,l,d}, complementing gitsigns' hunk-level view.

home/emmatherock/agents.nix

@@ -5,7 +5,6 @@ let
 in
 {
   home.packages = with agents; [
-    gemini-cli
     codex
     codex-acp
     claude-code

home/emmatherock/neovim.nix

@@ -120,6 +120,9 @@
     # --- Git: gutter signs, hunk stage/reset, blame ---
     plugins.gitsigns.enable = true;
 
+    # --- Git: interactive status/commit/diff/blame ---
+    plugins.fugitive.enable = true;
+
     # --- Statusline ---
     plugins.lualine.enable = true;
 
@@ -206,6 +209,13 @@
       { mode = [ "n" "v" ]; key = "<leader>ac"; action = "<cmd>CodeCompanionChat Toggle<CR>"; }
       { mode = "v"; key = "<leader>aa"; action = "<cmd>CodeCompanionChat Add<CR>"; }
       { mode = "n"; key = "<leader>ai"; action = "<cmd>CodeCompanion<CR>"; } # inline assistant
+
+      # Fugitive
+      { mode = "n"; key = "<leader>gs"; action = "<cmd>Git<CR>"; } # status
+      { mode = "n"; key = "<leader>gc"; action = "<cmd>Git commit<CR>"; } # interactive commit
+      { mode = "n"; key = "<leader>gp"; action = "<cmd>Git push<CR>"; }
+      { mode = "n"; key = "<leader>gl"; action = "<cmd>Git pull<CR>"; }
+      { mode = "n"; key = "<leader>gd"; action = "<cmd>Gvdiffsplit<CR>"; } # diff current file
     ];
   };
 }