copnfigure folding

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