Fix keymap conflicts and add improvements

- Fix duplicate git conflict keymaps (centralized in gitconflict.lua)
- Fix duplicate Copilot keymaps (centralized in copilot.lua)
- Change insert mode escape from 'jk' to 'jj' to avoid typing conflicts
- Add word counter to statusline (lualine)
- Disable Copilot by default for .tex files
- Remove textwidth limits for visual wrapping based on window width
- Add comprehensive improvements documentation (IMPROVEMENTS.md)
- Update README with links to documentation

lua/cargdev/core/keymaps/copilot.lua

@@ -1,18 +1,86 @@
 -- Copilot keymaps
 local keymap = vim.keymap
 
+-- Helper function to safely get Copilot modules
+local function get_copilot_panel()
+  local ok, panel = pcall(require, "copilot.panel")
+  return ok and panel or nil
+end
+
+local function get_copilot_suggestion()
+  local ok, suggestion = pcall(require, "copilot.suggestion")
+  return ok and suggestion or nil
+end
+
 -- Copilot panel and status
 keymap.set("n", "<leader>cp", ":Copilot panel<CR>", { desc = "Copilot: Open copilot panel" })
 keymap.set("n", "<leader>cd", ":Copilot disable<CR>", { desc = "Copilot: Disable" })
 keymap.set("n", "<leader>ce", ":Copilot enable<CR>", { desc = "Copilot: Enable" })
 keymap.set("n", "<leader>cs", ":Copilot status<CR>", { desc = "Copilot: Status" })
 
--- Copilot suggestion navigation (insert mode)
--- These are configured in copilot.lua but documented here for reference:
--- <leader>] - Next suggestion
--- <leader>[ - Previous suggestion
--- <M-l> - Accept suggestion
--- <C-]> - Dismiss suggestion
+-- Copilot panel keymaps
+keymap.set("n", "[[", function()
+  local panel = get_copilot_panel()
+  if panel and panel.is_open() then
+    panel.jump_prev()
+  end
+end, { desc = "Copilot: Jump to previous suggestion in panel" })
+
+keymap.set("n", "]]", function()
+  local panel = get_copilot_panel()
+  if panel and panel.is_open() then
+    panel.jump_next()
+  end
+end, { desc = "Copilot: Jump to next suggestion in panel" })
+
+keymap.set("n", "<CR>", function()
+  local panel = get_copilot_panel()
+  if panel and panel.is_open() then
+    panel.accept()
+  end
+end, { desc = "Copilot: Accept suggestion in panel" })
+
+keymap.set("n", "gr", function()
+  local panel = get_copilot_panel()
+  if panel and panel.is_open() then
+    panel.refresh()
+  end
+end, { desc = "Copilot: Refresh panel" })
+
+keymap.set("n", "<M-CR>", ":Copilot panel<CR>", { desc = "Copilot: Open panel" })
+
+-- Copilot suggestion keymaps (insert mode)
+keymap.set("i", "<Tab>", function()
+  local suggestion = get_copilot_suggestion()
+  if suggestion and suggestion.is_visible() then
+    suggestion.accept()
+  else
+    -- Feed Tab through so nvim-cmp can handle it for completion menu/snippets
+    -- Use 't' flag to avoid remapping, 'n' flag for normal mode keycodes
+    vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Tab>", true, false, true), "nt")
+  end
+end, { desc = "Copilot: Accept suggestion" })
+
+keymap.set("i", "<leader>]", function()
+  local suggestion = get_copilot_suggestion()
+  if suggestion and suggestion.is_visible() then
+    suggestion.next()
+  end
+end, { desc = "Copilot: Next suggestion" })
+
+keymap.set("i", "<leader>[", function()
+  local suggestion = get_copilot_suggestion()
+  if suggestion and suggestion.is_visible() then
+    suggestion.prev()
+  end
+end, { desc = "Copilot: Previous suggestion" })
+
+keymap.set("i", "<C-]>", function()
+  local suggestion = get_copilot_suggestion()
+  if suggestion and suggestion.is_visible() then
+    suggestion.dismiss()
+  end
+end, { desc = "Copilot: Dismiss suggestion" })
 
 -- CodeCompanion keymaps
 keymap.set("n", "<leader>cc", ":CodeCompanion<CR>", { desc = "CodeCompanion: Open CodeCompanion" })