fix: close side buffers on last main quit

[sand4rt]

No description provided.

[Copilot]

Pull request overview

Adds/reshapes the test suite around zen.setup() behavior and updates LuaDoc typings for configuration to reflect optional inputs.

Changes:

• Replaced the single setup smoke test with three new tests targeting opening/closing/split scenarios.
• Updated lua/zen/init.lua LuaDoc to make config fields and setup() options optional.
• Removed tests/test_setup.lua.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
tests/test_splits.lua	Adds a new test intended to cover behavior when vertical splits are opened.
tests/test_opening.lua	Adds a new test intended to cover side buffers opening on startup.
tests/test_closing.lua	Adds a new test intended to cover side buffers closing on quit.
tests/test_setup.lua	Removes the prior setup smoke test.
lua/zen/init.lua	Adjusts LuaDoc types to mark config/options as optional.

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.

Comments suppressed due to low confidence (1)

lua/zen/init.lua:241

• setup() defines ConfigOptions (optional user input), but the function is still typed as taking Config and uses a shallow vim.tbl_extend('force', ...). If a user passes main = {} / right = {} / left = {} (or misses width/min_width), this overwrites defaults and will lead to runtime errors where opts.main.width/opts[position].min_width are assumed (e.g., math.floor((vim.o.columns - opts.main.width)/2)). Change the param type to ConfigOptions and use a deep-merge/defaulting strategy so required internal fields remain present after merging.

---@param options? Config
local function setup(options)
	-- Default splitting will cause your main splits to jump when opening an integration.
	-- To prevent this, set `splitkeep` to either `screen` or `topline`.
	vim.opt.splitkeep = "screen"

	---@type Config
	opts = vim.tbl_extend("force", opts, options or {})

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