fix: close orphan bars + force redraw on tabline-disappear

When bufferline removes the tabline row (buffer count drops back to 1
after stepping out of a secondary file), the recovery ran but the
screen showed DUPLICATE status bar rows stacked on top of each other.
Root cause: during the tabline-disappear → window-shift cascade, nvim
occasionally leaves a stale bar window while our recover path creates
a new one, and/or keeps stale pixels from the pre-shift layout.

Two defenses added to recover_chrome():

1. Walk all windows; close any with filetype=TurboDebugBar that we're
   NOT tracking in sbar_win/cbar_win. Any orphaned bar window from a
   partial layout transition gets nuked before we create new ones.

2. Call `redraw!` at the end of recovery to force a full screen
   refresh, clearing any leftover pixels from the previous layout.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lua/turbo-debug/mode.lua

@@ -1117,6 +1117,18 @@ function M.enter()
   local function recover_chrome()
     vim.schedule(function()
       if not active then return end
+      -- Close any orphaned TurboDebugBar windows we're not tracking.
+      -- When the tabline toggles, nvim can sometimes leave a stale bar
+      -- window while creating a new one — which produces the "duplicate
+      -- turbo-debug rows stacked on top of each other" artifact.
+      for _, w in ipairs(vim.api.nvim_list_wins()) do
+        if vim.api.nvim_win_is_valid(w) and w ~= sbar_win and w ~= cbar_win then
+          local b = vim.api.nvim_win_get_buf(w)
+          if vim.api.nvim_buf_is_valid(b) and vim.bo[b].filetype == "TurboDebugBar" then
+            pcall(vim.api.nvim_win_close, w, true)
+          end
+        end
+      end
       if not (sbar_win and vim.api.nvim_win_is_valid(sbar_win)) then
         sbar_win, sbar_buf = nil, nil
       end
@@ -1125,6 +1137,9 @@ function M.enter()
       end
       open_bars()      -- idempotent
       render_bars()
+      -- Force a full redraw so any leftover pixels from the previous
+      -- layout (before tabline disappeared) don't linger on screen.
+      pcall(vim.cmd, "redraw!")
     end)
   end
   vim.api.nvim_create_autocmd("VimResized", { group = group, callback = recover_chrome })