feat: improve wrapped-line editing and completion cancellation

Use word-boundary wrapping and count-aware displayed-line movement in ordinary buffers. Escape cancels Blink completion before falling back. Preserve the existing ergonomics check; it was not rerun during Git cleanup.

modules/capabilities/neovim/lua-config/lua/plugins/completion.lua

@@ -15,6 +15,7 @@ require("lz.n").load({
     after = function()
       require("blink.cmp").setup({
         keymap = {
+          ["<Esc>"] = { "cancel", "fallback" },
           ["<C-j>"] = { "select_next", "fallback" },
           ["<C-k>"] = { "select_prev", "fallback" },
           ["<Tab>"] = { "select_and_accept", "fallback" },