fix(editor): wire preset save-as-name typing on the web host

Follow-up to the tool-switch gating: web's input_active() now treats the
variables preset save-as-name input as keyboard owner, but apply_text/backspace/
send/escape had no branch for it, so typed keys went nowhere (codex stop-review).
Wire the keyboard path on the shared property_input_draft buffer the
ThemePresetMenu widget paints — type/backspace (end-caret), Enter saves via
save_theme_preset, Escape cancels — mirroring native. 3 tests.

Note: the preset menu's inner press dispatch (click to focus the name input /
Save Current / Load / Import) is still unwired on web — a separate pre-existing
feature gap; this commit makes the name input functional once focused.

crates/op-host-web/src/widget_host/keyboard.rs

@@ -72,6 +72,22 @@ impl WidgetHost {
             self.mark_dirty();
             return true;
         }
+        // #20: the variables preset dropdown's save-as-name input. Types into
+        // the shared `property_input_draft` the ThemePresetMenu widget paints
+        // (native parity, `keyboard.rs::apply_text`). Web keeps the caret at the
+        // end of the draft (no mid-string editing wired for this field).
+        if self.editor_state.editor_ui.preset_name_input_active() && !c.is_control() {
+            let ui = &mut self.editor_state.ui;
+            if ui.property_draft_select_all {
+                ui.property_input_draft.clear();
+                ui.property_draft_select_all = false;
+            }
+            ui.property_input_draft.push(c);
+            ui.property_caret_pos = ui.property_input_draft.len();
+            ui.property_caret_anchor_ms = self.now_ms;
+            self.mark_dirty();
+            return true;
+        }
         // Variables-panel row/cell drafts — per-kind char gates
         // mirror the native host (numeric / free text / hex).
         if let Some(focus) = self.editor_state.editor_ui.variable_row_focus {
@@ -241,6 +257,26 @@ impl WidgetHost {
             }
             return false;
         }
+        // #20: preset save-as-name input — pop the last char (or clear a
+        // select-all draft), native parity.
+        if self.editor_state.editor_ui.preset_name_input_active() {
+            let ui = &mut self.editor_state.ui;
+            if ui.property_draft_select_all {
+                ui.property_input_draft.clear();
+                ui.property_caret_pos = 0;
+                ui.property_draft_select_all = false;
+                ui.property_caret_anchor_ms = self.now_ms;
+                self.mark_dirty();
+                return true;
+            }
+            if ui.property_input_draft.pop().is_some() {
+                ui.property_caret_pos = ui.property_input_draft.len();
+                ui.property_caret_anchor_ms = self.now_ms;
+                self.mark_dirty();
+                return true;
+            }
+            return false;
+        }
         if self
             .editor_state
             .editor_ui
@@ -389,6 +425,11 @@ impl WidgetHost {
             }
             return true;
         }
+        // #20: Enter in the preset save-as-name input saves the preset
+        // (native parity, `variable-theme-manager.tsx:298`).
+        if self.commit_variables_preset_name_if_any() {
+            return true;
+        }
         // Enter in the variables search box just blurs it (the
         // filter is already live).
         if self.variables_search_active() {
@@ -604,6 +645,11 @@ impl WidgetHost {
             self.mark_dirty();
             return true;
         }
+        // #20: Escape closes just the preset save-as-name input; the preset
+        // dropdown stays open (native parity, `variable-theme-manager.tsx:299`).
+        if self.escape_variables_preset_name() {
+            return true;
+        }
         // Modal overlays close one per press (mirrors native order:
         // export dialog → figma import → file menu).
         if self.editor_state.editor_ui.export_dialog_open {

crates/op-host-web/src/widget_host/keyboard_edit_ops.rs

@@ -55,6 +55,40 @@ impl WidgetHost {
         true
     }
 
+    /// Enter in the preset save-as-name input — saves the current theme as a
+    /// named preset, clears the draft, and defocuses (the dropdown stays open).
+    /// Native parity (`variables_preset_press.rs::commit_variables_preset_name_if_any`).
+    /// Blank names keep the input open. Returns whether the input was active.
+    pub(in crate::widget_host) fn commit_variables_preset_name_if_any(&mut self) -> bool {
+        if !self.editor_state.editor_ui.preset_name_input_active() {
+            return false;
+        }
+        let name = self.editor_state.ui.property_input_draft.clone();
+        if name.trim().is_empty() {
+            return true;
+        }
+        let now_ms = self.now_ms;
+        let _ = self.editor_state.save_theme_preset(&name, now_ms);
+        self.editor_state.editor_ui.variables_preset_name_focus = false;
+        self.editor_state.ui.property_input_draft.clear();
+        self.editor_state.ui.property_caret_pos = 0;
+        self.mark_dirty();
+        true
+    }
+
+    /// Escape in the preset save-as-name input — closes just the input, leaving
+    /// the preset dropdown open. Native parity.
+    pub(in crate::widget_host) fn escape_variables_preset_name(&mut self) -> bool {
+        if !self.editor_state.editor_ui.preset_name_input_active() {
+            return false;
+        }
+        self.editor_state.editor_ui.variables_preset_name_focus = false;
+        self.editor_state.ui.property_input_draft.clear();
+        self.editor_state.ui.property_caret_pos = 0;
+        self.mark_dirty();
+        true
+    }
+
     /// Cmd/Ctrl+D — duplicate the selected node as a sibling
     /// offset by ~10 doc px. Selection follows the clone.
     pub fn apply_duplicate(&mut self) -> bool {

crates/op-host-web/src/widget_host/keyboard_tests.rs

@@ -501,3 +501,41 @@ fn tool_shortcut_does_not_steal_keys_from_preset_name_input() {
     assert!(!host.apply_tool_shortcut("r"));
     assert_eq!(host.editor_state.tool, Tool::Select);
 }
+
+#[test]
+fn preset_name_input_receives_typed_keys_backspace_and_commit() {
+    let mut host = WidgetHost::new();
+    host.editor_state.editor_ui.variables_preset_menu_open = true;
+    host.editor_state.editor_ui.variables_preset_name_focus = true;
+    host.editor_state.ui.property_input_draft.clear();
+    assert!(host.editor_state.editor_ui.preset_name_input_active());
+
+    // Typed keys land in the shared draft the preset menu widget paints.
+    assert!(host.apply_text('M'));
+    assert!(host.apply_text('i'));
+    assert!(host.apply_text('d'));
+    assert_eq!(host.editor_state.ui.property_input_draft, "Mid");
+
+    // Backspace pops the last char.
+    assert!(host.apply_backspace());
+    assert_eq!(host.editor_state.ui.property_input_draft, "Mi");
+
+    // Enter commits the preset and defocuses the name input.
+    assert!(host.apply_send());
+    assert!(!host.editor_state.editor_ui.variables_preset_name_focus);
+    assert!(host.editor_state.ui.property_input_draft.is_empty());
+}
+
+#[test]
+fn preset_name_input_escape_cancels_without_saving() {
+    let mut host = WidgetHost::new();
+    host.editor_state.editor_ui.variables_preset_menu_open = true;
+    host.editor_state.editor_ui.variables_preset_name_focus = true;
+    host.editor_state.ui.property_input_draft = "Draft".to_string();
+
+    // Escape closes just the name input; the dropdown stays open.
+    assert!(host.apply_escape());
+    assert!(!host.editor_state.editor_ui.variables_preset_name_focus);
+    assert!(host.editor_state.editor_ui.variables_preset_menu_open);
+    assert!(host.editor_state.ui.property_input_draft.is_empty());
+}