Refactor config: fix conflicts, add features, update docs

- Fix keymap conflicts: session (<leader>sS/sR), substitute (<leader>sl)
- Remove duplicate keymaps (window, resize) and options (synmaxcol, foldmethod)
- Add which-key group names for better keymap organization
- Add auto-format on save with smart filtering (conform.nvim)
- Add diagnostic float on hover (CursorHold)
- Add safe buffer close with unsaved changes confirmation
- Add quickfix/location list navigation keymaps
- Add startup config validation (nvim version, executables)
- Enable plugin update notifications in lazy.nvim
- Clean up: remove temporary files (kkk, cleanup script)
- Clean up: remove commented code and fix double function loading
- Update README.md with comprehensive documentation
- Add CHANGELOG.md tracking all changes

lua/cargdev/core/init.lua

@@ -34,31 +34,80 @@ local function load_functions()
 end
 
 -- 4. Fix: Force filetype detection on BufRead (fix for nvim-tree/plain text issue)
+-- Only run if filetype is not already detected to avoid redundant calls
 vim.api.nvim_create_autocmd("BufRead", {
   pattern = "*",
   callback = function()
-    vim.cmd("silent filetype detect")
+    if vim.bo.filetype == "" then
+      vim.cmd("silent filetype detect")
+    end
   end,
 })
 
--- 5. Load functions immediately
-load_functions()
-
--- 6. Fallback: also try to load on VimEnter if LazyDone doesn't fire
+-- 5. Load functions on VimEnter to ensure plugins are loaded first
+-- Using a flag to prevent double-loading
+local functions_loaded = false
 vim.api.nvim_create_autocmd("VimEnter", {
   callback = function()
-    -- Wait a bit for plugins to load
-    vim.defer_fn(function()
-      load_functions()
-    end, 200)
+    if not functions_loaded then
+      vim.defer_fn(function()
+        load_functions()
+        functions_loaded = true
+      end, 200)
+    end
   end,
   once = true,
 })
 
---[[ vim.api.nvim_create_autocmd("BufReadPost", {
-  once = true,
+-- 6. Diagnostic float on hover (show diagnostics when cursor holds)
+vim.api.nvim_create_autocmd("CursorHold", {
   callback = function()
-    require("cargdev.core.project_config").bootstrap_config()
-  end
+    local opts = {
+      focusable = false,
+      close_events = { "BufLeave", "CursorMoved", "InsertEnter", "FocusLost" },
+      border = "rounded",
+      source = "always",
+      prefix = " ",
+      scope = "cursor",
+    }
+    vim.diagnostic.open_float(nil, opts)
+  end,
 })
- ]]
+
+-- 7. Configuration validation on startup
+local function validate_config()
+  local warnings = {}
+
+  -- Check Neovim version (require 0.9+)
+  if vim.fn.has("nvim-0.9") == 0 then
+    table.insert(warnings, "Neovim 0.9+ is recommended for this configuration")
+  end
+
+  -- Check for required executables
+  local required_executables = { "git", "rg", "node" }
+  for _, exe in ipairs(required_executables) do
+    if vim.fn.executable(exe) == 0 then
+      table.insert(warnings, string.format("'%s' not found in PATH", exe))
+    end
+  end
+
+  -- Display warnings if any
+  if #warnings > 0 then
+    vim.defer_fn(function()
+      for _, warning in ipairs(warnings) do
+        vim.notify("Config Warning: " .. warning, vim.log.levels.WARN)
+      end
+    end, 1000)
+  end
+end
+
+-- Run validation on startup
+vim.api.nvim_create_autocmd("VimEnter", {
+  callback = validate_config,
+  once = true,
+})
+
+-- 8. Custom health check command
+vim.api.nvim_create_user_command("CheckConfig", function()
+  vim.cmd("checkhealth")
+end, { desc = "Run Neovim health check" })

lua/cargdev/core/keymaps/general.lua

@@ -11,14 +11,16 @@ local opts = { noremap = true, silent = true }
 -- "jj" is much less likely to appear in normal typing and won't interfere
 keymap.set("i", "jj", "<ESC>", opts) -- Exit insert mode with jj
 keymap.set("n", "<leader>nh", ":nohl<CR>", opts) -- Clear search highlights
--- Removed: keymap.set("n", "x", '"_x', opts) -- Delete character without copying into register
--- This was causing single character deletions to not be copied to the default register
 
 -- Save and quit (additional)
 keymap.set("n", "<leader>Q", ":qa!<CR>", { desc = "Quit all" })
 
--- Put this in your init.lua
+-- Obsidian vault path with validation
 local vault_path = vim.env.IDEA_DIR
+if not vault_path or vault_path == "" then
+  -- Silently skip Obsidian link setup if IDEA_DIR is not configured
+  return
+end
 
 
 

lua/cargdev/core/keymaps/personal.lua

@@ -25,17 +25,7 @@ keymap.set("n", "<leader>no", ":noh <CR>", { desc = "Reset search a word" })
 keymap.set("n", "<leader>+", "<C-a>", { desc = "Increment number" }) -- increment
 keymap.set("n", "<leader>-", "<C-x>", { desc = "Decrement number" }) -- decrement
 
--- window management
-keymap.set("n", "<leader>sv", "<C-w>v", { desc = "Split window vertically" }) -- split window vertically
-keymap.set("n", "<leader>sh", "<C-w>s", { desc = "Split window horizontally" }) -- split window horizontally
-keymap.set("n", "<leader>se", "<C-w>=", { desc = "Make splits equal size" }) -- make split windows equal width & height
-keymap.set("n", "<leader>sx", "<cmd>close<CR>", { desc = "Close current split" }) -- close current split window
-
-keymap.set("n", "<leader>to", "<cmd>tabnew<CR>", { desc = "Open new tab" }) -- open new tab
-keymap.set("n", "<leader>tx", "<cmd>tabclose<CR>", { desc = "Close current tab" }) -- close current tab
-keymap.set("n", "<leader>tn", "<cmd>tabn<CR>", { desc = "Go to next tab" }) -- go to next tab
-keymap.set("n", "<leader>tp", "<cmd>tabp<CR>", { desc = "Go to previous tab" }) --  go to previous tab
-keymap.set("n", "<leader>tf", "<cmd>tabnew %<CR>", { desc = "Open current buffer in new tab" }) --  move current buffer to new tab
+-- Window management keymaps are centralized in lua/cargdev/core/keymaps/window.lua
 
 -- sintax fixer
 keymap.set("n", "<leader>sy", "gg=G<CR>", { desc = "Format current file" })
@@ -43,8 +33,26 @@ keymap.set("n", "<leader>sy", "gg=G<CR>", { desc = "Format current file" })
 keymap.set("n", "<C-e>", "10<C-e>", { noremap = true, silent = true })
 keymap.set("n", "<C-y>", "10<C-y>", { noremap = true, silent = true })
 
--- close current file on buffer
-keymap.set("n", "<leader>bd", ":bd<CR>", { desc = "Close current file on buffer" })
+-- Buffer management with safe close (confirms if unsaved changes)
+keymap.set("n", "<leader>bd", function()
+  if vim.bo.modified then
+    vim.ui.select({ "Save & Close", "Discard & Close", "Cancel" }, {
+      prompt = "Buffer has unsaved changes:",
+    }, function(choice)
+      if choice == "Save & Close" then
+        vim.cmd("w")
+        vim.cmd("bd")
+      elseif choice == "Discard & Close" then
+        vim.cmd("bd!")
+      end
+    end)
+  else
+    vim.cmd("bd")
+  end
+end, { desc = "Buffer: Close (safe)" })
+
+-- Force close buffer without confirmation
+keymap.set("n", "<leader>bD", ":bd!<CR>", { desc = "Buffer: Force close" })
 
 -- Set buftabline mappings
 keymap.set("n", "<C-p>", ":bnext<CR>", { noremap = true, silent = true })
@@ -62,17 +70,7 @@ keymap.set("n", "<leader>;", "$a;<ESC>", { desc = "Adding ';' at the end of the
 keymap.set("n", "<leader>con", "oconsole.log()<ESC>0w$h", { desc = "Adding console.log() on the line below" })
 keymap.set("n", "<leader>x", ":!node %<CR>", { desc = "Running current project using node" })
 
--- Move between Tmux and Neovim splits using Alt + Arrow keys
--- keymap.set("n", "<A-h>", ":TmuxNavigateLeft<CR>", { noremap = true, silent = true })
--- keymap.set("n", "<A-j>", ":TmuxNavigateDown<CR>", { noremap = true, silent = true })
--- keymap.set("n", "<A-k>", ":TmuxNavigateUp<CR>", { noremap = true, silent = true })
--- keymap.set("n", "<A-l>", ":TmuxNavigateRight<CR>", { noremap = true, silent = true })
-
--- Resize splits using Ctrl + Arrow keys
-keymap.set("n", "<C-l>", ":vertical resize -5<CR>", { noremap = true, silent = true })
-keymap.set("n", "<C-h>", ":vertical resize +5<CR>", { noremap = true, silent = true })
-keymap.set("n", "<C-k>", ":resize +5<CR>", { noremap = true, silent = true })
-keymap.set("n", "<C-j>", ":resize -5<CR>", { noremap = true, silent = true })
+-- Resize splits keymaps are centralized in lua/cargdev/core/keymaps/window.lua
 
 -- Run and Debug Project
 keymap.set("n", "<leader>pr", ":RunProject<CR>", { desc = "Run Project" })
@@ -91,3 +89,20 @@ keymap.set("v", "<leader>zd", ":CopilotChatDocs<CR>", { desc = "Generate docs (C
 keymap.set("n", "<leader>p", function()
   vim.cmd("read !pbpaste -Prefer html | pandoc -f html -t gfm")
 end, { desc = "Paste HTML clipboard as Markdown" })
+
+-- =============================================================================
+-- QUICKFIX NAVIGATION
+-- =============================================================================
+
+keymap.set("n", "<leader>qn", ":cnext<CR>zz", { desc = "Quickfix: Next item" })
+keymap.set("n", "<leader>qp", ":cprev<CR>zz", { desc = "Quickfix: Previous item" })
+keymap.set("n", "<leader>qo", ":copen<CR>", { desc = "Quickfix: Open list" })
+keymap.set("n", "<leader>qq", ":cclose<CR>", { desc = "Quickfix: Close list" })
+keymap.set("n", "<leader>qf", ":cfirst<CR>zz", { desc = "Quickfix: First item" })
+keymap.set("n", "<leader>ql", ":clast<CR>zz", { desc = "Quickfix: Last item" })
+
+-- Location list navigation
+keymap.set("n", "<leader>ln", ":lnext<CR>zz", { desc = "Location: Next item" })
+keymap.set("n", "<leader>lp", ":lprev<CR>zz", { desc = "Location: Previous item" })
+keymap.set("n", "<leader>lo", ":lopen<CR>", { desc = "Location: Open list" })
+keymap.set("n", "<leader>lq", ":lclose<CR>", { desc = "Location: Close list" })

lua/cargdev/core/keymaps/plugins.lua

@@ -42,17 +42,17 @@ keymap.set("n", "<leader>tf", "<cmd>ToggleTerm direction=float<cr>", { desc = "T
 keymap.set("n", "<leader>th", "<cmd>ToggleTerm size=10 direction=horizontal<cr>", { desc = "ToggleTerm horizontal split" })
 keymap.set("n", "<leader>tv", "<cmd>ToggleTerm size=80 direction=vertical<cr>", { desc = "ToggleTerm vertical split" })
 
--- Session management
-keymap.set("n", "<leader>ss", "<cmd>SessionSave<cr>", { desc = "Save session" })
-keymap.set("n", "<leader>sr", "<cmd>SessionRestore<cr>", { desc = "Restore session" })
+-- Session management (using <leader>sS and <leader>sR to avoid conflicts with substitute)
+keymap.set("n", "<leader>sS", "<cmd>SessionSave<cr>", { desc = "Session: Save" })
+keymap.set("n", "<leader>sR", "<cmd>SessionRestore<cr>", { desc = "Session: Restore" })
 
 -- Formatting
 keymap.set("n", "<leader>f", "<cmd>lua vim.lsp.buf.format()<cr>", { desc = "Format buffer" })
 
--- Substitute (changed from <leader>s to <leader>sub to avoid conflicts)
-keymap.set("n", "<leader>sub", "<cmd>lua require('substitute').operator()<cr>", { desc = "Substitute with motion" })
-keymap.set("n", "<leader>ss", "<cmd>lua require('substitute').line()<cr>", { desc = "Substitute line" })
-keymap.set("n", "<leader>S", "<cmd>lua require('substitute').eol()<cr>", { desc = "Substitute to end of line" })
+-- Substitute
+keymap.set("n", "<leader>sub", "<cmd>lua require('substitute').operator()<cr>", { desc = "Substitute: With motion" })
+keymap.set("n", "<leader>sl", "<cmd>lua require('substitute').line()<cr>", { desc = "Substitute: Line" })
+keymap.set("n", "<leader>S", "<cmd>lua require('substitute').eol()<cr>", { desc = "Substitute: To end of line" })
 
 -- Surround
 keymap.set("n", "<leader>sa", "<cmd>lua require('nvim-surround').surround_add()<cr>", { desc = "Add surrounding" })

lua/cargdev/core/options.lua

@@ -40,7 +40,7 @@ opt.smartindent = true -- Smart indent
 opt.updatetime = 100 -- Faster completion (reduced from 250)
 opt.timeoutlen = 200 -- Faster key sequence completion (reduced from 300)
 opt.redrawtime = 1500 -- Allow more time for loading syntax
-opt.synmaxcol = 240 -- Only highlight the first 240 columns
+opt.synmaxcol = 200 -- Only highlight the first 200 columns (conservative for performance)
 opt.maxmempattern = 1000 -- Reduce memory for pattern matching
 opt.hidden = true -- Allow switching buffers without saving
 opt.scrolljump = 1 -- Minimal number of screen lines to scroll
@@ -49,9 +49,7 @@ opt.sidescrolloff = 3 -- Keep 3 columns left/right of cursor (reduced from 8)
 
 -- Syntax loading optimizations
 opt.syntax = "on" -- Enable syntax highlighting
-opt.synmaxcol = 200 -- Reduce syntax highlighting column limit
 opt.lazyredraw = false -- Don't use lazy redraw (can cause issues)
-opt.foldmethod = "syntax" -- Use syntax-based folding for better performance
 opt.foldlevel = 99 -- Don't fold by default
 
 -- Filetype plugin optimizations
@@ -101,9 +99,8 @@ opt.formatoptions:append("j") -- Remove comment leader when joining lines
 opt.showmatch = true -- Show matching brackets
 opt.matchtime = 2 -- How long to show matching brackets
 
--- Folding
+-- Folding (indent-based is generally faster than syntax-based)
 opt.foldmethod = "indent" -- Fold based on indentation
-opt.foldlevel = 99 -- Don't fold by default
 opt.foldnestmax = 10 -- Maximum nesting level
 
 -- Backup and swap