feat: UI visibility — sidebar toggle, enriched statusline, toggle feedback

- Netrw sidebar: ,e/,E toggles left-side tree (topleft + winfixwidth)
- vim . opens netrw sidebar (30 cols) + Startify dashboard
- Statusline: buffer count, PASTE/SPELL/MAX flags, LSP server, encoding
- Toggle echo: F2/F3/F4/F6/,ss/,z show new state
- README: fix empty table header in "What's in the box"

README.md

@@ -34,8 +34,8 @@ chopsticks gives you a production-ready Vim config in one command. Pure VimScrip
 
 ## What's in the box
 
-| | |
-|-|-|
+| Feature | Description |
+|---------|-------------|
 | **LSP** | completion, go-to-def, hover, rename, code actions — pure VimScript ([vim-lsp](https://github.com/prabirshrestha/vim-lsp)) |
 | **Lint + format** | [ALE](https://github.com/dense-analysis/ale) runs black, prettier, gofmt, rustfmt on save |
 | **Fuzzy find** | files, buffers, grep, tags, marks, commands — [FZF](https://github.com/junegunn/fzf.vim) |

modules/navigation.vim

@@ -12,25 +12,20 @@ let g:netrw_list_hide   .= ',\.pyc$,node_modules,\.git,__pycache__,\.DS_Store'
 
 function! s:ToggleSidebar(...) abort
     let l:dir = a:0 ? a:1 : getcwd()
-    if exists('t:netrw_sidebar_buf')
-        let l:win = bufwinnr(t:netrw_sidebar_buf)
-        if l:win != -1
+    if getbufvar(winbufnr(1), '&filetype') ==# 'netrw' && getwinvar(1, '&winfixwidth')
         let l:cur = winnr()
-            execute l:win . 'wincmd w'
+        1wincmd w
         close
-            if l:cur > l:win
+        if l:cur > 1
             execute (l:cur - 1) . 'wincmd w'
         endif
-            unlet t:netrw_sidebar_buf
         return
     endif
-        unlet t:netrw_sidebar_buf
-    endif
-    execute '1wincmd w'
-    execute 'Vexplore ' . fnameescape(l:dir)
-    vertical resize 30
-    let t:netrw_sidebar_buf = bufnr('%')
-    wincmd l
+    execute 'topleft vertical 30new'
+    execute 'Explore ' . fnameescape(l:dir)
+    setlocal winfixwidth
+    setlocal bufhidden=wipe
+    wincmd p
 endfunction
 
 nnoremap <silent> <leader>e :call <SID>ToggleSidebar()<CR>

modules/ui.vim

@@ -85,15 +85,16 @@ if exists('g:plugs["vim-startify"]')
         endif
         let l:dir = fnameescape(argv()[0])
         execute 'cd ' . l:dir
-        execute 'Vexplore ' . l:dir
-        vertical resize 30
-        let t:netrw_sidebar_buf = bufnr('%')
-        wincmd l
+        vertical rightbelow vnew
         if exists(':Startify') == 2
             Startify
         else
             enew
         endif
+        wincmd h
+        vertical resize 30
+        setlocal winfixwidth
+        wincmd l
     endfunction
 
     if !g:is_tty