fix(ui): polish native rounded float

README.md

@@ -190,8 +190,9 @@ its terminal session.
 ## Float Window Hosts
 
 The built-in `native` host is the default. It uses Neovim's window API directly, has no optional UI
-dependency, and provides the agent-aware title, border highlights, and responsive sizing described
-by the shared float settings.
+dependency, and has a rounded border with a centered, agent-aware title. Its surface and border use
+the editor's base `Normal` highlight rather than the raised `NormalFloat` background. Responsive
+sizing is shared by both float hosts.
 
 Set `float.host = "snacks"` to use
 [`Snacks.win`](https://github.com/folke/snacks.nvim/blob/main/docs/win.md) for floating views:

doc/agent-term.txt

@@ -96,6 +96,9 @@ Float keys:
   `height`  Proportion (0, 1] of editor height or row count; default: 0.8
   `border`  Neovim floating-window border; default: "rounded"
 
+The native float has a rounded border and centered agent-aware title by
+default. Its surface and border use the editor's base `Normal` highlight.
+
 The Snacks host is optional and applies only to floats; panels always remain
 native. If `host = "snacks"` cannot load snacks.nvim, Agent Term warns and
 caches the native fallback for the current Neovim run while the configured

lua/agent_term/ui/float/native.lua

@@ -12,9 +12,9 @@ local winhighlight = table.concat({
 }, ",")
 
 local function apply_default_highlights()
-	vim.api.nvim_set_hl(0, "AgentTermFloat", { default = true, link = "NormalFloat" })
-	vim.api.nvim_set_hl(0, "AgentTermFloatBorder", { default = true, link = "FloatBorder" })
-	vim.api.nvim_set_hl(0, "AgentTermFloatTitle", { default = true, link = "FloatTitle" })
+	vim.api.nvim_set_hl(0, "AgentTermFloat", { default = true, link = "Normal" })
+	vim.api.nvim_set_hl(0, "AgentTermFloatBorder", { default = true, link = "Normal" })
+	vim.api.nvim_set_hl(0, "AgentTermFloatTitle", { default = true, link = "Title" })
 end
 
 apply_default_highlights()

tests/spec/config_spec.lua

@@ -50,6 +50,7 @@ describe("Given multi-agent configuration", function()
 		assert.are.equal("codex", config.active_agent)
 		assert.is_false(opts.agents.codex.context.hook.enabled)
 		assert.are.equal("native", opts.float.host)
+		assert.are.equal("rounded", opts.float.border)
 		assert.is_false(opts.keymaps)
 	end)
 

tests/spec/ui_spec.lua

@@ -75,27 +75,29 @@ describe("Given Agent Term UI views", function()
 		assert.are.equal(gemini, state.session("gemini").float_win)
 	end)
 
-	it("When opening the native float Then its title and highlights identify the agent", function()
+	it("When opening the native float Then its rounded frame and title identify the agent", function()
 		local bufnr = track_buf(vim.api.nvim_create_buf(false, true))
 		local win = float.open(bufnr, "codex")
 		local win_config = vim.api.nvim_win_get_config(win)
 		local window_highlights = vim.api.nvim_get_option_value("winhighlight", { win = win })
 
+		assert.are.equal("rounded", config.options.float.border)
+		assert.are.same({ "╭", "─", "╮", "│", "╯", "─", "╰", "│" }, win_config.border)
 		assert.are.same({ { " Agent Term · codex ", "AgentTermFloatTitle" } }, win_config.title)
 		assert.are.equal("center", win_config.title_pos)
 		assert.matches("Normal:AgentTermFloat", window_highlights, 1, true)
 		assert.matches("FloatBorder:AgentTermFloatBorder", window_highlights, 1, true)
 		assert.matches("FloatTitle:AgentTermFloatTitle", window_highlights, 1, true)
 		assert.are.equal(
-			"NormalFloat",
+			"Normal",
 			vim.api.nvim_get_hl(0, { name = "AgentTermFloat", link = true }).link
 		)
 		assert.are.equal(
-			"FloatBorder",
+			"Normal",
 			vim.api.nvim_get_hl(0, { name = "AgentTermFloatBorder", link = true }).link
 		)
 		assert.are.equal(
-			"FloatTitle",
+			"Title",
 			vim.api.nvim_get_hl(0, { name = "AgentTermFloatTitle", link = true }).link
 		)
 	end)