Clean up config: fix broken plugin specs, dedupe options/keymaps, drop dead code

- lspsaga: custom keys lived outside config(), so setup({}) ran empty and
  they never worked; moved into setup() and updated to the plugin's current
  option schema (finder_action_keys/definition_action_keys/move_in_saga
  are stale names in the installed version)
- catppuccin: fixed a stray `as = "catppuccin"` key left outside the plugin
  table; wrapped as { "catppuccin/nvim", name = "catppuccin" }
- options: consolidated the three competing sources (vimrc, init.lua,
  custom/options.lua) into custom/options.lua alone; hlsearch/wrap were
  silently landing opposite to what init.lua's own comments said, purely
  from require-order. custom/options.lua now loads first in the require
  chain since colorizer.lua and others need termguicolors set before their
  own setup() runs
- removed duplicate keymaps that were dead on arrival due to load order
  (<leader>rn, <leader>sf/sg/sh, jj, <leader>y, mapleader x3, manual
  C-h/j/k/l vs vim-tmux-navigator)
- removed dead code: smart_format, root_dir/fallback_root_dir, toggleterm's
  unused _LAZYGIT_TOGGLE/_NODE_TOGGLE/_PYTHON_TOGGLE globals, unused local
  cmp, stale commented blocks, lua/custom/startup.lua
- removed unused plugins: mini.icons, telescope-dap.nvim,
  startup-nvim/startup.nvim (malformed spec, never actually required),
  plus leftover ALE globals with no ALE plugin installed
- vim.loop.* -> vim.uv.*, vim.diagnostic.goto_prev/next ->
  vim.diagnostic.jump({count=...}) for 0.12.5
- guard vim.treesitter.start() at the top of init.lua: the system's
  bundled Lua highlight query is currently ahead of the available
  tree-sitter-lua grammar (a packaging skew, confirmed nvim-treesitter is
  fully up to date), which was throwing on every Lua buffer and taking
  omnifunc/foldexpr down with it; now falls back to regex highlighting
  with a single notify instead

Verified end-to-end against a real Neovim 0.12.5 headless instance with a
fresh plugin install: no load errors, lspsaga's custom keys now actually
apply, and the treesitter guard was confirmed against the real environment.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013jVh2Lhn386JAvjSFCHUhn

lua/custom/lspconfig.lua

@@ -7,24 +7,6 @@
 
 local keymap = vim.keymap -- for conciseness
 
--- smart format with null-ls if available
-local function smart_format()
-    vim.lsp.buf.format({
-        filter = function(client)
-            local ft = vim.bo.filetype
-            if ft == "rust" then
-                return client.name == "rust_analyzer"
-            end
-            -- Prefer null-ls for all non-Rust, otherwise allow anything
-            if vim.tbl_contains({ "null-ls", "lua_ls", "jsonls", "tsserver" }, client.name) then
-                return true
-            end
-            return false
-        end,
-        timeout_ms = 3000,
-    })
-end
-
 ---------- border >------------------------------
 do
     local orig_floating_preview = vim.lsp.util.open_floating_preview
@@ -55,11 +37,9 @@ local on_attach = function(_, bufnr)
     keymap.set("n", "g0", "<cmd>lua vim.lsp.buf.document_symbol()<CR>", opts)
     keymap.set("n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
     keymap.set("n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
-    -- keymap.set("n", "<leader>l", smart_format, opts)
     keymap.set("n", "<leader>l", function()
         vim.lsp.buf.format()
     end, { desc = "Format code function" })
-    keymap.set("n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
     keymap.set(
         "n",
         "<leader>cbf",
@@ -121,15 +101,6 @@ setup_server("rust_analyzer", {
 
 
 -- PHP LSPs
-local util = vim.lsp.util
-local root_dir = function(fname)
-    return util.root_pattern("composer.json", ".git")(fname)
-        or util.path.dirname(fname)
-end
-
-local fallback_root_dir = function(fname)
-    return util.root_pattern("composer.json", ".git")(fname) or util.path.dirname(fname)
-end
 
 -- start it manually :LspStart phpactor
 -- setup_server("phpactor", {
@@ -186,13 +157,12 @@ setup_server("intelephense", {
 -- phpcs / phpstan configs
 vim.g.nvim_phpcs_config_phpcs_path = 'phpcs'
 vim.g.nvim_phpcs_config_phpcbf_path = 'phpcbf'
-vim.g.ale_php_phpstan_executable = '~/.config/composer/vendor/bin/phpstan'
 
 local phpcs_config = "~/repos/configs/phpcs.xml"
 local phpcs_config_new = "~/repos/dotfiles/phpcs.xml"
-if vim.loop.fs_stat(phpcs_config_new) then
+if vim.uv.fs_stat(phpcs_config_new) then
     vim.g.nvim_phpcs_config_phpcs_standard = phpcs_config_new
-elseif vim.loop.fs_stat(phpcs_config) then
+elseif vim.uv.fs_stat(phpcs_config) then
     vim.g.nvim_phpcs_config_phpcs_standard = phpcs_config
 end