Make TUI responsive to terminal size

- Auto-hide docs panel when terminal < 100 cols, respects manual F1 toggle
- Hide logo on main menu when terminal < 80 cols
- DataTable: flexible height (auto with min/max) instead of fixed 12
- Dialogs, pickers, wizard: percentage-based widths with max-width caps
- Menu list: flexible height and width constraints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tui/app.py

@@ -1,5 +1,6 @@
 from textual.app import App
 from textual.css.query import NoMatches
+from textual.events import Resize
 
 from tui.config import has_remotes, has_targets
 from tui.screens.main_menu import MainMenuScreen
@@ -62,13 +63,36 @@ class GnizaApp(App):
         else:
             self.notify(f"{job.label} failed (exit code {message.return_code})", severity="error")
 
+    # Width threshold for auto-hiding the docs panel
+    DOCS_AUTO_HIDE_WIDTH = 100
+
     def action_toggle_docs(self) -> None:
         try:
             panel = self.screen.query_one("#docs-panel")
             panel.display = not panel.display
+            panel._user_toggled = True
         except NoMatches:
             pass
 
+    def on_resize(self, event: Resize) -> None:
+        try:
+            panel = self.screen.query_one("#docs-panel")
+        except NoMatches:
+            return
+        if getattr(panel, "_user_toggled", False):
+            return
+        panel.display = event.size.width >= self.DOCS_AUTO_HIDE_WIDTH
+
+    def on_screen_resume(self) -> None:
+        """Re-evaluate docs panel visibility when switching screens."""
+        try:
+            panel = self.screen.query_one("#docs-panel")
+        except NoMatches:
+            return
+        if getattr(panel, "_user_toggled", False):
+            return
+        panel.display = self.size.width >= self.DOCS_AUTO_HIDE_WIDTH
+
     async def action_quit(self) -> None:
         if job_manager.running_count() > 0:
             from tui.widgets import ConfirmDialog

tui/gniza.tcss

@@ -28,8 +28,10 @@ Screen {
 
 #menu-list {
     width: 1fr;
-    max-width: 35;
+    max-width: 40;
-    height: 20;
+    min-width: 25;
+    height: auto;
+    max-height: 22;
     margin: 1 2 0 2;
 }
 
@@ -39,7 +41,9 @@ Screen {
 
 /* Data tables */
 DataTable {
-    height: 12;
+    height: auto;
+    min-height: 5;
+    max-height: 16;
     margin: 1 0;
 }
 
@@ -125,6 +129,7 @@ SelectionList {
 #set-buttons {
     height: auto;
     margin: 1 0;
+    overflow: hidden;
 }
 
 #backup-buttons Button,
@@ -145,7 +150,8 @@ SelectionList {
 
 /* Dialogs */
 #confirm-dialog {
-    width: 60;
+    width: 80%;
+    max-width: 60;
     height: auto;
     padding: 2;
     background: $panel;
@@ -173,8 +179,10 @@ SelectionList {
 
 /* Folder picker */
 #folder-picker {
-    width: 70;
+    width: 90%;
-    height: 30;
+    max-width: 70;
+    height: 80%;
+    max-height: 30;
     padding: 1;
     background: $panel;
     border: thick $accent;
@@ -216,7 +224,8 @@ SelectionList {
 
 /* Operation log */
 #op-log {
-    width: 80%;
+    width: 90%;
+    max-width: 120;
     height: 80%;
     padding: 1;
     background: $panel;
@@ -254,7 +263,8 @@ SelectionList {
 
 /* Snapshot browser */
 #snapshot-browser {
-    width: 80%;
+    width: 90%;
+    max-width: 120;
     height: 80%;
     padding: 1;
     background: $panel;
@@ -302,7 +312,8 @@ SelectionList {
 
 /* Wizard */
 #wizard {
-    width: 60;
+    width: 90%;
+    max-width: 60;
     padding: 2;
 }
 
@@ -350,8 +361,10 @@ Switch {
 
 /* File picker */
 #file-picker {
-    width: 70;
+    width: 90%;
-    height: 30;
+    max-width: 70;
+    height: 80%;
+    max-height: 30;
     padding: 1;
     background: $panel;
     border: thick $accent;

tui/screens/main_menu.py

@@ -57,8 +57,16 @@ class MainMenuScreen(Screen):
         yield Footer()
 
     def on_mount(self) -> None:
+        self._update_logo_visibility()
         self.query_one("#menu-list", OptionList).focus()
 
+    def on_resize(self) -> None:
+        self._update_logo_visibility()
+
+    def _update_logo_visibility(self) -> None:
+        logo = self.query_one("#logo")
+        logo.display = self.app.size.width >= 80
+
     def on_option_list_option_selected(self, event: OptionList.OptionSelected) -> None:
         option_id = event.option.id
         if option_id == "quit":