Phosphor icons: resolve by name via a generated map (T-314)

Replace the 49 hand-maintained named consts with one generated
label→codepoint map (phosphor_glyphs.g.dart, 1512 glyphs from the glyph
table via tool/gen_phosphor_glyphs.dart). Feature code now references
glyphs by their exact kebab-case name — PhosphorIcons.byName('folder') —
with no raw codepoints; this also lets a Lua extension name an icon
without crossing the FFI boundary with a codepoint.

byName is total: an unknown name degrades to the `placeholder` box so the
bug is visible (it's a real error), while phosphor_glyphs_test asserts
every byName('...') literal in lib/ resolves — recovering the typo check a
const gave. Migrated the 89 call sites. Adds EmptyIconPainter for an
intentional blank that still reserves the icon box; ClideFilterBox gains
showIcon to keep the slot aligned when blank.

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

lib/builtin/claude/src/claude_composer.dart

@@ -564,7 +564,7 @@ class _ClaudeComposerState extends State<ClaudeComposer> {
               onTap: () => _removeAttachment(a),
               child: MouseRegion(
                 cursor: SystemMouseCursors.click,
-                child: ClideIcon(PhosphorIcons.xMark, size: 12, color: theme.globalTextMuted),
+                child: ClideIcon(PhosphorIcons.byName('x'), size: 12, color: theme.globalTextMuted),
               ),
             ),
           ),
@@ -580,6 +580,6 @@ class _ClaudeComposerState extends State<ClaudeComposer> {
     if (a.isImage) {
       return ImageThumbnail(path: a.path, size: 44);
     }
-    return ClideIcon(PhosphorIcons.fileText, size: 18, color: theme.globalTextMuted);
+    return ClideIcon(PhosphorIcons.byName('file-text'), size: 18, color: theme.globalTextMuted);
   }
 }

lib/builtin/claude/src/claude_meta_sidebar.dart

@@ -902,14 +902,14 @@ class _AgentRosterRowState extends State<_AgentRosterRow> {
       children: [
         // Show / hide
         _IconButton(
-          painter: isVisible ? PhosphorIcons.eye : PhosphorIcons.eyeSlash,
+          painter: isVisible ? PhosphorIcons.byName('eye') : PhosphorIcons.byName('eye-slash'),
           tooltip: isVisible ? 'Hide pane' : 'Show pane',
           color: tokens.globalTextMuted,
           onTap: () => isVisible ? widget.orchestrator!.hide(managed.id) : widget.orchestrator!.show(managed.id),
         ),
         // Mute / unmute
         _IconButton(
-          painter: isMuted ? PhosphorIcons.eyeSlash : PhosphorIcons.eye,
+          painter: isMuted ? PhosphorIcons.byName('eye-slash') : PhosphorIcons.byName('eye'),
           // NOTE: We use eye/eyeSlash as stand-ins until a dedicated speaker
           // icon is added to PhosphorIcons (no speaker codepoint yet).
           // The semantic tooltip still says mute/unmute so AT users are clear.
@@ -919,21 +919,21 @@ class _AgentRosterRowState extends State<_AgentRosterRow> {
         ),
         // Inject message
         _IconButton(
-          painter: PhosphorIcons.chatCircle,
+          painter: PhosphorIcons.byName('chat-circle'),
           tooltip: 'Inject message',
           color: isInjecting ? tokens.globalFocus : tokens.globalTextMuted,
           onTap: () => widget.onToggleInject(widget.member.name),
         ),
         // Fork session (T-172): branch into a new pane without touching the original.
         _IconButton(
-          painter: PhosphorIcons.gitBranch,
+          painter: PhosphorIcons.byName('git-branch'),
           tooltip: 'Fork session',
           color: tokens.globalTextMuted,
           onTap: () => widget.onFork(widget.member.name),
         ),
         // Close session
         _IconButton(
-          painter: PhosphorIcons.xMark,
+          painter: PhosphorIcons.byName('x'),
           tooltip: 'Close session',
           color: tokens.globalTextMuted,
           onTap: () => widget.onClose(widget.member.name),
@@ -958,7 +958,7 @@ class _AgentRosterRowState extends State<_AgentRosterRow> {
           ),
           const SizedBox(width: 4),
           _IconButton(
-            painter: PhosphorIcons.xMark,
+            painter: PhosphorIcons.byName('x'),
             tooltip: 'Cancel',
             color: tokens.globalTextMuted,
             onTap: () => widget.onToggleInject(widget.member.name),
@@ -1186,7 +1186,7 @@ class _TaskRow extends StatelessWidget {
           // Reassign: cycle to the next roster member.
           if (broker != null && broker!.members.length > 1)
             _IconButton(
-              painter: PhosphorIcons.arrowClockwise,
+              painter: PhosphorIcons.byName('arrow-clockwise'),
               tooltip: 'Reassign task',
               color: tokens.globalTextMuted,
               onTap: () => _reassign(context),

lib/builtin/claude/src/conversation_card.dart

@@ -288,7 +288,7 @@ class _ConversationCardState extends State<ConversationCard> {
         builder: (_, hovered, pressed) => Padding(
           padding: const EdgeInsets.only(right: 6),
           child: ClideIcon(
-            _collapsed ? PhosphorIcons.caretRight : PhosphorIcons.caretDown,
+            _collapsed ? PhosphorIcons.byName('caret-right') : PhosphorIcons.byName('caret-down'),
             size: 12,
             color: tokens.globalTextMuted,
           ),

lib/builtin/claude/src/conversation_view.dart

@@ -535,7 +535,7 @@ class _ConversationTurn extends StatelessWidget {
         child: Row(
           mainAxisSize: MainAxisSize.min,
           children: [
-            ClideIcon(PhosphorIcons.image, size: 16, color: tokens.globalTextMuted),
+            ClideIcon(PhosphorIcons.byName('image'), size: 16, color: tokens.globalTextMuted),
             const SizedBox(width: 8),
             Flexible(
               child: ClideText('could not load $path', fontSize: clideFontMeta, color: tokens.globalTextMuted, maxLines: 1),

lib/builtin/claude/src/extension.dart

@@ -296,7 +296,7 @@ class ClaudeExtension extends ClideExtension {
           id: 'claude.meta',
           slot: Slots.sidebar,
           title: 'Activity',
-          icon: PhosphorIcons.robot,
+          icon: PhosphorIcons.byName('robot'),
           priority: 60,
           build: (_) => const ClaudeMetaSidebar(),
         ),

lib/builtin/claude/src/image_thumbnail.dart

@@ -36,7 +36,7 @@ Widget _placeholder(BuildContext context, double size) {
     height: size,
     color: t.panelBackground,
     alignment: Alignment.center,
-    child: ClideIcon(PhosphorIcons.image, size: size * 0.45, color: t.globalTextMuted),
+    child: ClideIcon(PhosphorIcons.byName('image'), size: size * 0.45, color: t.globalTextMuted),
   );
 }
 

lib/builtin/claude/src/permission_mode_control.dart

@@ -19,13 +19,13 @@ import 'package:flutter/widgets.dart';
 ClideIconPainter permissionModeIcon(String mode) {
   switch (mode) {
     case 'acceptEdits':
-      return PhosphorIcons.pencilSimple;
+      return PhosphorIcons.byName('pencil-simple');
     case 'plan':
-      return PhosphorIcons.listChecks;
+      return PhosphorIcons.byName('list-checks');
     case 'bypassPermissions':
-      return PhosphorIcons.shieldWarning;
+      return PhosphorIcons.byName('shield-warning');
     default:
-      return PhosphorIcons.shieldCheck;
+      return PhosphorIcons.byName('shield-check');
   }
 }
 

lib/builtin/claude/src/team_chat_sidebar.dart

@@ -150,7 +150,7 @@ class _TeamChatSidebarState extends State<TeamChatSidebar> {
                 builder: (ctx, hovered, _) => Padding(
                   padding: const EdgeInsets.symmetric(horizontal: 2, vertical: 1),
                   child: ClideIcon(
-                    PhosphorIcons.arrowsOutSimple,
+                    PhosphorIcons.byName('arrows-out-simple'),
                     size: 10,
                     color: hovered ? tokens.globalForeground : tokens.globalTextMuted,
                   ),
@@ -383,7 +383,7 @@ class _TeamChatPaneState extends State<TeamChatPane> {
                           ),
                           child: _interrupt
                               ? Center(
-                                  child: ClideIcon(PhosphorIcons.check, size: 9, color: tokens.globalFocus),
+                                  child: ClideIcon(PhosphorIcons.byName('check'), size: 9, color: tokens.globalFocus),
                                 )
                               : null,
                         ),