Fix guided mode: full-screen TextField and hide Save FAB

Rework guided-mode layout so the text field fills the full available
screen height. The previous approach nested _buildStepPage (a Column
with its own Expanded) inside NoteEditor's outer Expanded — a
nested-Column/Expanded chain that collapses silently in release builds.

Fix: return _buildStepPage directly from build() when in guided mode,
making the TextField a first-level Expanded child of the same Column
as _buildRaw uses. This is the same depth at which expands:true works.

Also hide the Save FAB (_chromeVisible gate in CaptureScreen) while
guided mode is active so it cannot overlap the Next/Done button.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017Cb7oE5Xsc8zSBHHtT6qwa

lib/ui/capture_screen.dart

@@ -420,11 +420,13 @@ class _CaptureScreenState extends State<CaptureScreen>
           ],
         ),
       ),
-      floatingActionButton: FloatingActionButton.extended(
+      floatingActionButton: _chromeVisible
+          ? FloatingActionButton.extended(
               onPressed: _saveAndReset,
               icon: const Icon(Icons.check),
               label: const Text('Save'),
-      ),
+            )
+          : null,
     );
   }
 

lib/ui/note_editor.dart

@@ -338,23 +338,15 @@ class _NoteEditorState extends State<NoteEditor> {
     final theme = Theme.of(context);
     if (_enteringGuided) return _buildGuidedEntryWizard(theme);
 
-    // Guided (the bare stepper) hides the template/mode chrome entirely —
+    // Guided hides the template/mode chrome entirely. Return the flat step
-    // that's the point of "Guided": just the stepper, no top-bar noise. A
+    // page directly so the TextField sits in THIS column's Expanded — same
-    // single back arrow is the only way out, restoring the full chrome.
+    // depth as _buildRaw, avoiding the nested-Column/Expanded layout issue
-    final bareGuided = _mode == NoteEditorMode.guided;
+    // that silently collapses the inner flex space in release builds.
+    if (_mode == NoteEditorMode.guided) return _buildStepPage(theme);
+
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        if (bareGuided)
-          Align(
-            alignment: Alignment.centerLeft,
-            child: IconButton(
-              icon: const Icon(Icons.arrow_back),
-              tooltip: 'Exit guided',
-              onPressed: _exitGuided,
-            ),
-          )
-        else ...[
         DropdownButtonFormField<String>(
           initialValue: _template.id,
           isDense: true,
@@ -403,7 +395,6 @@ class _NoteEditorState extends State<NoteEditor> {
             onSelectionChanged: (s) => _setMode(s.first),
           ),
         ),
-        ],
         const SizedBox(height: 12),
         Expanded(child: _buildBody(theme)),
       ],
@@ -520,7 +511,8 @@ class _NoteEditorState extends State<NoteEditor> {
       case NoteEditorMode.raw:
         return _buildRaw(theme);
       case NoteEditorMode.guided:
-        return _buildStepPage(theme);
+        // build() short-circuits to _buildStepPage before reaching here.
+        return _buildRaw(theme);
     }
   }
 
@@ -541,6 +533,10 @@ class _NoteEditorState extends State<NoteEditor> {
     );
   }
 
+  /// Full-screen per-step view returned directly from [build] so the
+  /// [TextField] is a first-level [Expanded] child of THIS column — the same
+  /// depth as [_buildRaw].  Nesting it inside a second Column broke the
+  /// flutter constraint chain in release builds (inner Expanded got 0 height).
   Widget _buildStepPage(ThemeData theme) {
     _ensureControllers(_template);
     final sections = _template.sections;
@@ -552,9 +548,18 @@ class _NoteEditorState extends State<NoteEditor> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        // Progress bar + step counter
+        // Back arrow — only exit from guided mode.
+        Align(
+          alignment: Alignment.centerLeft,
+          child: IconButton(
+            icon: const Icon(Icons.arrow_back),
+            tooltip: 'Exit guided',
+            onPressed: _exitGuided,
+          ),
+        ),
+        // Progress bar + step counter.
         Padding(
-          padding: const EdgeInsets.fromLTRB(16, 8, 16, 4),
+          padding: const EdgeInsets.fromLTRB(16, 0, 16, 4),
           child: Row(
             children: [
               Text('${idx + 1} / $total', style: theme.textTheme.labelMedium),
@@ -565,14 +570,12 @@ class _NoteEditorState extends State<NoteEditor> {
             ],
           ),
         ),
-        // Section label + helper + text field
+        // Section label + helper text.
-        Expanded(
+        Padding(
-          child: SingleChildScrollView(
+          padding: const EdgeInsets.fromLTRB(16, 8, 16, 0),
-            padding: const EdgeInsets.symmetric(horizontal: 16),
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
-                const SizedBox(height: 8),
               Text(
                 section.isTitle ? 'title' : section.label,
                 style: theme.textTheme.titleMedium,
@@ -585,12 +588,21 @@ class _NoteEditorState extends State<NoteEditor> {
                 ),
               ),
               const SizedBox(height: 12),
-                TextField(
+            ],
+          ),
+        ),
+        // TextField fills all remaining space — directly in this Column's
+        // Expanded, same as _buildRaw, so expands:true works correctly.
+        Expanded(
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(16, 0, 16, 0),
+            child: TextField(
               controller: controller,
               autofocus: widget.autofocus && idx == 0,
-                  maxLines: section.inline ? 1 : null,
+              expands: true,
-                  minLines: section.inline ? 1 : 6,
+              maxLines: null,
               keyboardType: TextInputType.multiline,
+              textAlignVertical: TextAlignVertical.top,
               decoration: InputDecoration(
                 hintText: section.hint,
                 border: const OutlineInputBorder(),
@@ -601,11 +613,9 @@ class _NoteEditorState extends State<NoteEditor> {
                 _emit();
               },
             ),
-              ],
           ),
         ),
-        ),
+        // Navigation buttons — sibling of Expanded so keyboard pushes them up.
-        // Navigation buttons — below Expanded so they stay above the keyboard
         Padding(
           padding: const EdgeInsets.all(16),
           child: Row(