docs/user-guide.md

@@ -105,11 +105,12 @@ stored mapping.
 ## Import and export Host Entries
 
 Press `Ctrl+X` to export the current in-memory Host Entries. Choose hosts, JSON, or
-CSV and enter a destination path. The workflow validates the destination and
+CSV and enter a destination path, or choose a directory with **Browse…** and
+edit the suggested filename. The workflow validates the destination and
 requires explicit confirmation before an existing file is overwritten.
 
 Press `Ctrl+O` in Privileged Mode to import a hosts, JSON, or CSV file. Choose the
-format explicitly, then select the source path. A successful import replaces
+format explicitly, then select the source path with **Browse…** or by typing it. A successful import replaces
 the current Host Entries and saves the Hosts File; parse and save errors remain
 visible in the message rail and leave the current file unchanged.
 

src/hosts/tui/import_export_modal.py

@@ -7,7 +7,15 @@ from textual.app import ComposeResult
 from textual.binding import Binding
 from textual.containers import Horizontal, Vertical
 from textual.screen import ModalScreen
-from textual.widgets import Button, Input, Label, RadioButton, RadioSet, Static
+from textual.widgets import (
+    Button,
+    DirectoryTree,
+    Input,
+    Label,
+    RadioButton,
+    RadioSet,
+    Static,
+)
 
 from ..core.import_export import ExportFormat, ImportFormat, ImportResult
 
@@ -34,7 +42,7 @@ class _FormatModal(ModalScreen):
 
     BINDINGS = [Binding("escape", "cancel", "Cancel")]
     CSS = """
-    _FormatModal { align: center middle; }
+    ExportModal, ImportModal { align: center middle; }
     #format-container {
         width: 72; height: auto; max-height: 90%; background: $surface;
         border: thick $primary; padding: 1 2;
@@ -82,7 +90,9 @@ class ExportModal(_FormatModal):
                 classes="format-copy",
             )
             yield Label("Export file path")
-            yield Input(placeholder="/path/to/entries.hosts", id="path-input")
+            with Horizontal():
+                yield Input(placeholder="/path/to/entries.hosts", id="path-input")
+                yield Button("Browse…", id="browse-button")
             with RadioSet(id="format-select"):
                 for index, format in enumerate(self._formats):
                     yield RadioButton(
@@ -106,6 +116,8 @@ class ExportModal(_FormatModal):
             self.action_cancel()
         elif event.button.id == "continue-button":
             self.action_continue()
+        elif event.button.id == "browse-button":
+            self.action_browse()
         elif event.button.id == "confirm-button" and self._request is not None:
             self.dismiss(self._request)
 
@@ -130,6 +142,22 @@ class ExportModal(_FormatModal):
             return
         self.dismiss(request)
 
+    def action_browse(self) -> None:
+        """Choose an export directory without requiring a typed path."""
+        value = self.query_one("#path-input", Input).value.strip()
+        start = Path(value).expanduser() if value else Path.cwd()
+        if not start.is_dir():
+            start = start.parent
+
+        def selected(directory: Path | None) -> None:
+            if directory is not None:
+                format = self._selected_format(ExportFormat)
+                self.query_one("#path-input", Input).value = str(
+                    directory / f"hosts-export{_format_suffix(format)}"
+                )
+
+        self.app.push_screen(FileBrowserModal(start, choose_directory=True), selected)
+
 
 class ImportModal(_FormatModal):
     """Collect an import file and format before replacing Host Entries."""
@@ -147,7 +175,9 @@ class ImportModal(_FormatModal):
                 classes="format-copy",
             )
             yield Label("Import file path")
-            yield Input(placeholder="/path/to/entries.hosts", id="path-input")
+            with Horizontal():
+                yield Input(placeholder="/path/to/entries.hosts", id="path-input")
+                yield Button("Browse…", id="browse-button")
             with RadioSet(id="format-select"):
                 for index, format in enumerate(self._formats):
                     yield RadioButton(
@@ -177,6 +207,95 @@ class ImportModal(_FormatModal):
                     )
                     return
                 self.dismiss(ImportRequest(path, format, result))
+        elif event.button.id == "browse-button":
+            self.action_browse()
+
+    def action_browse(self) -> None:
+        """Choose an import file from the terminal file browser."""
+        value = self.query_one("#path-input", Input).value.strip()
+        start = Path(value).expanduser() if value else Path.cwd()
+        if not start.is_dir():
+            start = start.parent
+
+        def selected(path: Path | None) -> None:
+            if path is not None:
+                self.query_one("#path-input", Input).value = str(path)
+
+        self.app.push_screen(FileBrowserModal(start, choose_directory=False), selected)
+
+
+class FileBrowserModal(ModalScreen[Path | None]):
+    """A keyboard-accessible directory tree for file and folder selection."""
+
+    BINDINGS = [Binding("escape", "cancel", "Cancel")]
+    CSS = """
+    FileBrowserModal { align: center middle; }
+    #file-browser-container {
+        width: 90; height: 90%; max-width: 90%; background: $surface;
+        border: thick $primary; padding: 1 2;
+    }
+    .browser-title { text-align: center; text-style: bold; color: $primary; }
+    .browser-copy { color: $text-muted; margin-top: 1; }
+    #file-browser-status { height: 1; color: $warning; margin-top: 1; }
+    #file-browser-tree { height: 1fr; margin-top: 1; border: round $primary; }
+    """
+
+    def __init__(self, start_path: Path, *, choose_directory: bool):
+        super().__init__()
+        self._start_path = start_path if start_path.is_dir() else Path.cwd()
+        self._choose_directory = choose_directory
+        self._selected_directory: Path | None = None
+
+    def compose(self) -> ComposeResult:
+        with Vertical(id="file-browser-container"):
+            yield Static(
+                "Choose export directory"
+                if self._choose_directory
+                else "Choose import file",
+                classes="browser-title",
+            )
+            yield Static(
+                "Use arrow keys to browse. Enter selects a file; expand folders with Right.",
+                classes="browser-copy",
+            )
+            yield Static(str(self._start_path), id="file-browser-status")
+            yield DirectoryTree(self._start_path, id="file-browser-tree")
+            with Horizontal(classes="button-row"):
+                yield Button("Cancel", id="cancel-button")
+                if self._choose_directory:
+                    yield Button(
+                        "Choose directory",
+                        id="choose-directory-button",
+                        variant="primary",
+                    )
+
+    def on_mount(self) -> None:
+        self.query_one("#file-browser-tree", DirectoryTree).focus()
+
+    def on_directory_tree_file_selected(
+        self, event: DirectoryTree.FileSelected
+    ) -> None:
+        if self._choose_directory:
+            self.query_one("#file-browser-status", Static).update(
+                "Choose a directory for the export destination."
+            )
+            return
+        self.dismiss(event.path)
+
+    def on_directory_tree_directory_selected(
+        self, event: DirectoryTree.DirectorySelected
+    ) -> None:
+        self._selected_directory = event.path
+        self.query_one("#file-browser-status", Static).update(str(event.path))
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        if event.button.id == "cancel-button":
+            self.action_cancel()
+        elif event.button.id == "choose-directory-button":
+            self.dismiss(self._selected_directory or self._start_path)
+
+    def action_cancel(self) -> None:
+        self.dismiss(None)
 
 
 def _format_label(format: ExportFormat | ImportFormat) -> str:
@@ -186,3 +305,12 @@ def _format_label(format: ExportFormat | ImportFormat) -> str:
         "json": "JSON (.json)",
         "csv": "CSV (.csv)",
     }[format.value]
+
+
+def _format_suffix(format: ExportFormat) -> str:
+    """Provide an editable default filename after choosing an export folder."""
+    return {
+        ExportFormat.HOSTS: ".hosts",
+        ExportFormat.JSON: ".json",
+        ExportFormat.CSV: ".csv",
+    }[format]

tests/test_import_export_workflow.py

@@ -13,7 +13,7 @@ from hosts.core.import_export import (
 )
 from hosts.core.models import HostEntry, HostsFile
 from hosts.tui.app import HostsManagerApp
-from hosts.tui.import_export_modal import ExportModal, ImportModal
+from hosts.tui.import_export_modal import ExportModal, FileBrowserModal, ImportModal
 
 
 @pytest.mark.asyncio
@@ -42,6 +42,52 @@ async def test_export_shortcut_opens_a_format_chooser_and_reports_validation():
         )
 
 
+@pytest.mark.asyncio
+async def test_export_modal_is_centered_in_the_terminal_viewport():
+    """The export form is centered rather than pinned to a terminal corner."""
+    app = HostsManagerApp()
+    app.load_hosts_file = Mock()
+
+    async with app.run_test(size=(120, 40)) as pilot:
+        await pilot.press("ctrl+x")
+        await pilot.pause()
+
+        container = app.screen.query_one("#format-container")
+        assert container.region.x == (app.size.width - container.region.width) // 2
+
+        assert container.region.y == (app.size.height - container.region.height) // 2
+
+
+@pytest.mark.asyncio
+async def test_export_browser_lets_the_user_choose_a_destination_directory():
+    """Browse opens a centered directory tree rather than requiring a typed path."""
+    app = HostsManagerApp()
+    app.load_hosts_file = Mock()
+
+    async with app.run_test(size=(120, 40)) as pilot:
+        await pilot.press("ctrl+x")
+        await pilot.pause()
+        await pilot.press("tab")
+        await pilot.press("enter")
+        await pilot.pause()
+        await pilot.pause()
+
+        assert isinstance(app.screen, FileBrowserModal)
+        assert app.screen.query_one("#file-browser-tree") is not None
+        container = app.screen.query_one("#file-browser-container")
+        assert container.region.x == (app.size.width - container.region.width) // 2
+
+        await pilot.press("tab")
+        await pilot.press("tab")
+        await pilot.press("enter")
+        await pilot.pause()
+        await pilot.pause()
+        assert isinstance(app.screen, ExportModal)
+        assert app.screen.query_one("#path-input", Input).value.endswith(
+            "hosts-export.hosts"
+        )
+
+
 @pytest.mark.asyncio
 async def test_export_requires_overwrite_confirmation_before_calling_service(tmp_path):
     """An existing output file is not replaced until the user confirms it."""