feat(ai): integrate Claude Code into Neovim via claudecode.nvim

Add coder/claudecode.nvim with native terminal split (right, 38%):
- <leader>ac  toggle Claude Code panel
- <leader>af  focus panel
- <leader>as  send visual selection to Claude
- <leader>ab  add current buffer to context
- <leader>aa  accept diff / <leader>aD deny diff
- <leader>am  switch model
- <leader>as  add file from neo-tree/NvimTree

Also add kezhenxu94/nvim-claude-lsp for LSP completions inside
Claude's Ctrl+G compose buffers (slash commands, @file, skills).

Author: Venkata Subramani Renduchintala

lua/plugins/configs/claudecode.lua

@@ -0,0 +1,60 @@
+return {
+  -- Claude Code integration via the same WebSocket/MCP protocol as the VS Code extension.
+  -- Opens claude CLI in a native terminal split; tracks your active buffer and selection
+  -- so Claude has context without you having to paste anything.
+  {
+    "coder/claudecode.nvim",
+    cmd = {
+      "ClaudeCode",
+      "ClaudeCodeFocus",
+      "ClaudeCodeSend",
+      "ClaudeCodeAdd",
+      "ClaudeCodeTreeAdd",
+      "ClaudeCodeDiffAccept",
+      "ClaudeCodeDiffDeny",
+      "ClaudeCodeSelectModel",
+      "ClaudeCodeStatus",
+    },
+    keys = {
+      { "<leader>ac", "<cmd>ClaudeCode<cr>",            desc = "[AI] Toggle Claude Code" },
+      { "<leader>af", "<cmd>ClaudeCodeFocus<cr>",       desc = "[AI] Focus Claude Code" },
+      { "<leader>as", "<cmd>ClaudeCodeSend<cr>",        mode = "v", desc = "[AI] Send selection" },
+      { "<leader>ab", "<cmd>ClaudeCodeAdd %<cr>",       desc = "[AI] Add buffer to context" },
+      { "<leader>aa", "<cmd>ClaudeCodeDiffAccept<cr>",  desc = "[AI] Accept diff" },
+      { "<leader>aD", "<cmd>ClaudeCodeDiffDeny<cr>",    desc = "[AI] Deny diff" },
+      { "<leader>am", "<cmd>ClaudeCodeSelectModel<cr>", desc = "[AI] Select model" },
+      -- Add file to Claude context from file explorers
+      { "<leader>as", "<cmd>ClaudeCodeTreeAdd<cr>",
+        ft = { "neo-tree", "NvimTree", "oil", "netrw" },
+        desc = "[AI] Add file to context" },
+    },
+    opts = {
+      terminal = {
+        provider = "native",
+        split_side = "right",
+        split_width_percentage = 0.38,
+        auto_close = true,
+        auto_insert = true,
+      },
+      track_selection = true,
+      diff_opts = {
+        layout = "vertical",
+        auto_resize_terminal = true,
+      },
+    },
+    config = function(_, opts)
+      require("claudecode").setup(opts)
+      require("which-key").add({
+        { "<leader>a", group = "AI / Claude Code" },
+      })
+    end,
+  },
+
+  -- LSP completions inside Claude Code's Ctrl+G compose buffers:
+  -- slash commands (/compact, /clear …), @file references, and installed skills.
+  {
+    "kezhenxu94/nvim-claude-lsp",
+    ft = { "markdown", "text" },
+    opts = {},
+  },
+}

lua/plugins/init.lua

@@ -116,6 +116,9 @@ local plugins = {
 
   -- Latex based on VimTex
   require("plugins.configs.latex"),
+
+  ---- AI
+  require("plugins.configs.claudecode"),
 }
 
 -- vim.api.nvim_echo({ { 'Active theme: ' .. theme.theme_name, "Normal" } }, true, {});