show filter-box placeholders + make the search icon optional

The Search tab's Find mode stacked four ClideFilterBoxes (search,
replace, include, exclude) that all looked identical: every box drew the
magnifying glass and the hint was only a semantics label, never visible
text — so they read as four blank search boxes. Render the hint as
placeholder text while empty, and make the leading icon optional (the
replace + glob fields pass icon: null). General win — every filter box
now shows its placeholder.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -54,6 +54,10 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ### Fixed
 
+- Filter/search inputs show their hint as visible placeholder text, and the
+  search-glass icon is now optional — so the Search tab's Find fields (search,
+  replace, include/exclude globs) are distinguishable instead of four identical
+  empty boxes. (T-201)
 - The sidebar icon rail no longer overflows when there are more tabs than fit:
   it centers the icons when they fit and scrolls horizontally otherwise. (T-200)
 - The editor pane now opens over the Claude pane when a file is opened — the

lib/builtin/search/src/search_panel_view.dart

@@ -137,7 +137,7 @@ class _SearchPanelViewState extends State<SearchPanelView> {
                   const SizedBox(height: 6),
                   Row(
                     children: [
-                      Expanded(child: ClideFilterBox(hint: 'Replace', debounce: Duration.zero, onChanged: c.setReplacement)),
+                      Expanded(child: ClideFilterBox(hint: 'Replace', icon: null, debounce: Duration.zero, onChanged: c.setReplacement)),
                       const SizedBox(width: 6),
                       _ReplaceAllButton(
                         enabled: c.replacement.isNotEmpty && c.matchCount > 0,
@@ -147,9 +147,9 @@ class _SearchPanelViewState extends State<SearchPanelView> {
                     ],
                   ),
                   const SizedBox(height: 6),
-                  ClideFilterBox(hint: 'files to include (e.g. *.dart)', debounce: Duration.zero, onChanged: (v) => c.include = v),
+                  ClideFilterBox(hint: 'files to include (e.g. *.dart)', icon: null, debounce: Duration.zero, onChanged: (v) => c.include = v),
                   const SizedBox(height: 4),
-                  ClideFilterBox(hint: 'files to exclude', debounce: Duration.zero, onChanged: (v) => c.exclude = v),
+                  ClideFilterBox(hint: 'files to exclude', icon: null, debounce: Duration.zero, onChanged: (v) => c.exclude = v),
                 ],
               ),
             ),

lib/widgets/src/clide_filter_box.dart

@@ -13,6 +13,7 @@ class ClideFilterBox extends StatefulWidget {
     this.hint = 'Filter…',
     this.debounce = const Duration(milliseconds: 200),
     this.onSubmitted,
+    this.icon = PhosphorIcons.magnifyingGlass,
   });
 
   final ValueChanged<String> onChanged;
@@ -20,6 +21,10 @@ class ClideFilterBox extends StatefulWidget {
   final Duration debounce;
   final ValueChanged<String>? onSubmitted;
 
+  /// Leading glyph. Defaults to the search glass; pass null for inputs
+  /// that aren't searches (e.g. a replace or glob field).
+  final ClideIconPainter? icon;
+
   @override
   State<ClideFilterBox> createState() => _ClideFilterBoxState();
 }
@@ -68,18 +73,36 @@ class _ClideFilterBoxState extends State<ClideFilterBox> {
           padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 5),
           child: Row(
             children: [
-              ClideIcon(PhosphorIcons.magnifyingGlass, size: 13, color: tokens.globalTextMuted),
-              const SizedBox(width: 6),
+              if (widget.icon != null) ...[
+                ClideIcon(widget.icon!, size: 13, color: tokens.globalTextMuted),
+                const SizedBox(width: 6),
+              ],
               Expanded(
-                child: EditableText(
-                  controller: _controller,
-                  focusNode: _focus,
-                  style: TextStyle(fontSize: clideFontCaption, color: tokens.globalForeground),
-                  cursorColor: tokens.globalFocus,
-                  backgroundCursorColor: tokens.globalTextMuted,
-                  maxLines: 1,
-                  onChanged: _onChanged,
-                  onSubmitted: widget.onSubmitted != null ? (v) => widget.onSubmitted!(v) : null,
+                child: Stack(
+                  alignment: Alignment.centerLeft,
+                  children: [
+                    // Placeholder shown while empty — the hint was only a
+                    // semantics label before, so empty boxes looked blank.
+                    if (!hasText)
+                      IgnorePointer(
+                        child: Text(
+                          widget.hint,
+                          maxLines: 1,
+                          overflow: TextOverflow.ellipsis,
+                          style: TextStyle(fontSize: clideFontCaption, color: tokens.globalTextMuted),
+                        ),
+                      ),
+                    EditableText(
+                      controller: _controller,
+                      focusNode: _focus,
+                      style: TextStyle(fontSize: clideFontCaption, color: tokens.globalForeground),
+                      cursorColor: tokens.globalFocus,
+                      backgroundCursorColor: tokens.globalTextMuted,
+                      maxLines: 1,
+                      onChanged: _onChanged,
+                      onSubmitted: widget.onSubmitted != null ? (v) => widget.onSubmitted!(v) : null,
+                    ),
+                  ],
                 ),
               ),
               if (hasText)

test/widgets/zero_coverage_widgets_test.dart

@@ -7,6 +7,7 @@ import 'package:clide/clide.dart';
 import 'package:clide/extension/extension.dart';
 import 'package:clide/widgets/src/clide_column_hat.dart';
 import 'package:clide/widgets/src/clide_filter_box.dart';
+import 'package:clide/widgets/src/clide_icon.dart';
 import 'package:clide/widgets/src/clide_icon_rail.dart';
 import 'package:clide/widgets/src/clide_palette.dart';
 import 'package:clide/widgets/src/clide_resize_border.dart';
@@ -291,6 +292,20 @@ void main() {
       await tester.pump();
       expect(submitted, 'submit-me');
     });
+
+    testWidgets('renders the hint as a placeholder (shown empty, hidden once typed); icon optional', (tester) async {
+      await tester.pumpWidget(harness(
+        f,
+        ClideFilterBox(onChanged: (_) {}, hint: 'Replace', icon: null),
+      ));
+      // Placeholder visible while empty; no leading search glyph (icon: null).
+      expect(find.text('Replace'), findsOneWidget);
+      expect(find.byType(ClideIcon), findsNothing);
+      // Typing hides the placeholder.
+      await tester.enterText(find.byType(EditableText), 'x');
+      await tester.pump();
+      expect(find.text('Replace'), findsNothing);
+    });
   });
 
   group('ColumnHat', () {