* fix: show float title when border is nil
Problem: the float title was only shown via the native `nvim_win_set_config`
path, which requires a border to render. The guard `config.float.border ~=
'none'` did not account for `nil`, which is the default — so users with no
explicit `border` config never saw the path title in the floating window.
Solution: require both `~= nil` and `~= 'none'` before using the native
title. In all other cases (border nil, 'none', or nvim < 0.9), fall back to
`util.add_title_to_win`, which renders a child floating window for the title.
Based on: stevearc/oil.nvim#683
* refactor: drop nvim-0.9 version checks in float title logic
Problem: when `prompt_save_on_select_new_entry` is enabled and the user
presses Escape on the "Save changes?" confirm dialog, `vim.fn.confirm`
returns 0, but the select continued as if the user had chosen "No".
Solution: add an explicit `choice == 0` branch that returns immediately,
aborting the select without saving or opening any files.
* fix: restore `buflisted` on jumplist buffer re-entry
Problem: Neovim's jumplist machinery re-enters canola buffers via an
internal `:edit`-equivalent path, which unconditionally sets
`buflisted = true`. The existing workaround in `open()` and
`open_float()` only covers canola-initiated navigation, leaving
`<C-o>` and `<C-i>` unhandled.
Solution: Apply the same `buf_options.buflisted` guard in the
`BufEnter` autocmd, directly after `set_win_options()`. This fires
on every buffer entry — including all jumplist paths — and mirrors
the pattern already used at the two `:edit` callsites.
* docs: mark upstream #302 as fixed in tracker
Problem: the codebase still used the upstream \`oil\` naming everywhere —
URL schemes, the \`:Oil\` command, highlight groups, user events, module
paths, filetypes, buffer/window variables, LuaCATS type annotations,
vimdoc help tags, syntax groups, and internal identifiers.
Solution: mechanical rename of every reference. URL schemes now use
\`canola://\` (plus \`canola-ssh://\`, \`canola-s3://\`, \`canola-sss://\`,
\`canola-trash://\`, \`canola-test://\`). The \`:Canola\` command replaces
\`:Oil\`. All highlight groups, user events, augroups, namespaces,
filetypes, require paths, type annotations, help tags, and identifiers
follow suit. The \`upstream\` remote to \`stevearc/oil.nvim\` has been
removed and the \`vim.g.oil\` deprecation shim dropped.
