copnfigure folding

lua/plugins/ufo.lua

@@ -41,14 +41,43 @@ return {
         jumpBot = ']',
       },
     },
+    -- Custom fold text showing line count
+    fold_virt_text_handler = function(virtText, lnum, endLnum, width, truncate)
+      local newVirtText = {}
+      local suffix = ('  %d lines '):format(endLnum - lnum)
+      local sufWidth = vim.fn.strdisplaywidth(suffix)
+      local targetWidth = width - sufWidth
+      local curWidth = 0
+      
+      for _, chunk in ipairs(virtText) do
+        local chunkText = chunk[1]
+        local chunkWidth = vim.fn.strdisplaywidth(chunkText)
+        if targetWidth > curWidth + chunkWidth then
+          table.insert(newVirtText, chunk)
+        else
+          chunkText = truncate(chunkText, targetWidth - curWidth)
+          local hlGroup = chunk[2]
+          table.insert(newVirtText, {chunkText, hlGroup})
+          chunkWidth = vim.fn.strdisplaywidth(chunkText)
+          if curWidth + chunkWidth < targetWidth then
+            suffix = suffix .. (' '):rep(targetWidth - curWidth - chunkWidth)
+          end
+          break
+        end
+        curWidth = curWidth + chunkWidth
+      end
+      
+      table.insert(newVirtText, {suffix, 'MoreMsg'})
+      return newVirtText
+    end,
   },
   config = function(_, opts)
     -- Set fold settings for nvim-ufo
-    vim.o.foldcolumn = '1'      -- Show fold column
+    vim.o.foldcolumn = '0'      -- Hide fold column (we don't need it)
     vim.o.foldlevel = 99        -- Open all folds by default
     vim.o.foldlevelstart = 99   -- Open all folds when opening a file
     vim.o.foldenable = true     -- Enable folding
-    -- Use simple characters for fold indicators
+    -- Use simple characters for fold indicators (though foldcolumn is hidden)
     vim.o.fillchars = [[eob: ,fold: ,foldopen:▼,foldsep: ,foldclose:▶]]
 
     require('ufo').setup(opts)

lua/settings.lua

@@ -41,3 +41,32 @@ vim.opt.tabstop = 4               -- Display tabs as 4 spaces
 vim.opt.shiftwidth = 4            -- Indent by 4
 vim.opt.softtabstop = 4           -- Backspace removes 4 spaces
 vim.opt.expandtab = true          -- Use spaces by default (overridden per-filetype)
+
+-- LSP diagnostics configuration
+vim.diagnostic.config({
+  virtual_text = {
+    spacing = 4,
+    prefix = '●',
+    -- Show severity (ERROR, WARN, INFO, HINT)
+    format = function(diagnostic)
+      return string.format("%s: %s", diagnostic.source or "", diagnostic.message)
+    end,
+  },
+  signs = true,              -- Keep signs in signcolumn
+  underline = true,          -- Underline problematic text
+  update_in_insert = false,  -- Don't update diagnostics while typing
+  severity_sort = true,      -- Sort by severity (errors first)
+  float = {
+    border = 'rounded',
+    source = 'always',       -- Show diagnostic source
+    header = '',
+    prefix = '',
+  },
+})
+
+-- Diagnostic signs in signcolumn
+local signs = { Error = "E", Warn = "W", Hint = "H", Info = "I" }
+for type, icon in pairs(signs) do
+  local hl = "DiagnosticSign" .. type
+  vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = hl })
+end