fix runtime exceptions surfaced when the editor opens

Now that the editor split actually opens (T-197), it exposed latent
issues, plus a coincidental Claude-session crash in the same log:

- T-203: the _EditorDragHandle's slider Semantics had value +
  onIncrease/onDecrease but no increased/decreasedValue, so Flutter
  asserted on every semantics flush — add them. And opening the split
  reparented the Claude pane (direct child → Column/Expanded), tearing
  down its SelectableRegion mid selection-update ('selectable not in
  this registrar' / 'inactive element'); a stable GlobalKey on the
  workspace primary makes Flutter move the element instead.
- T-202: rate_limit_event.resetsAt arrives as a unix-epoch number but
  was cast `as String?`, throwing in the stream-json line parser. Accept
  a num (epoch) or an ISO string.

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

.pql/changelog/ticket_history/2026-06.sql

@@ -11,3 +11,5 @@ INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by,
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-197', 'description', 'Opening a file in the editor (the reader''s edit pencil, a non-.md file-tree click, a decision''s edit) calls editor.open and the daemon opens the buffer, but the editor pane never appears in the workspace slot above the Claude pane. Root cause: EditorExtension contributes a workspace tab (editor.active, priority 80) but has no activate() that reveals/activates it. editor.opened is emitted on the DaemonBus, but the EditorController that handles it only exists once EditorView is mounted — and nothing ever activates the editor tab to mount it. Fix: add EditorExtension.activate() subscribing to the editor.opened / editor.active-changed DaemonEvents and calling panels.activateTab(Slots.workspace, ''editor.active''). EditorView.hydrate() already pulls the active buffer on mount, so reveal-then-hydrate avoids any publish/subscribe race.', 'Opening a file in the editor (the reader''s edit pencil, a non-.md file-tree click, a decision''s edit) calls editor.open and the daemon opens the buffer, but the editor pane never appears in the workspace slot above the Claude pane. Root cause: EditorExtension contributes a workspace tab (editor.active, priority 80) but has no activate() that reveals/activates it. editor.opened is emitted on the DaemonBus, but the EditorController that handles it only exists once EditorView is mounted — and nothing ever activates the editor tab to mount it. Fix: add EditorExtension.activate() subscribing to the editor.opened / editor.active-changed DaemonEvents and calling panels.activateTab(Slots.workspace, ''editor.active''). EditorView.hydrate() already pulls the active buffer on mount, so reveal-then-hydrate avoids any publish/subscribe race.
 
 Reopened fix (2026-06-01): the original fix called panels.activateTab(Slots.workspace, ''editor.active''), but _WorkspaceSlot renders its editor split off arrangement.editorOpen, NOT the active tab — so the editor never appeared. Real fix: EditorExtension.activate now calls arrangement.openEditor() on editor.opened / active-changed(non-null) and closeEditor() on active-changed(null). Test asserts arrangement.editorOpen.', NULL, '2026-06-01 16:36:38', '2026-06-01 16:36:38', '2026-06-01 16:36:38', NULL, '62283198922795b643960d5beab56dba', 1) ON CONFLICT(hash) DO NOTHING;
+INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-203', 'status', 'backlog', 'done', NULL, '2026-06-01 16:48:56', '2026-06-01 16:48:56', '2026-06-01 16:48:56', NULL, '2cd8d1f09a2cd432491f4ee1fecbadc0', 1) ON CONFLICT(hash) DO NOTHING;
+INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-202', 'status', 'backlog', 'done', NULL, '2026-06-01 16:48:56', '2026-06-01 16:48:56', '2026-06-01 16:48:56', NULL, '2e730a377952b4ec2dd11561a97fcd00', 1) ON CONFLICT(hash) DO NOTHING;

.pql/changelog/tickets/2026-06.sql

@@ -9,3 +9,5 @@ INSERT INTO tickets (id, type, parent_id, title, description, status, priority,
 INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-197', 'bug', NULL, 'Editor pane never reveals on editor.open (edit button, file-tree open)', 'Opening a file in the editor (the reader''s edit pencil, a non-.md file-tree click, a decision''s edit) calls editor.open and the daemon opens the buffer, but the editor pane never appears in the workspace slot above the Claude pane. Root cause: EditorExtension contributes a workspace tab (editor.active, priority 80) but has no activate() that reveals/activates it. editor.opened is emitted on the DaemonBus, but the EditorController that handles it only exists once EditorView is mounted — and nothing ever activates the editor tab to mount it. Fix: add EditorExtension.activate() subscribing to the editor.opened / editor.active-changed DaemonEvents and calling panels.activateTab(Slots.workspace, ''editor.active''). EditorView.hydrate() already pulls the active buffer on mount, so reveal-then-hydrate avoids any publish/subscribe race.
 
 Reopened fix (2026-06-01): the original fix called panels.activateTab(Slots.workspace, ''editor.active''), but _WorkspaceSlot renders its editor split off arrangement.editorOpen, NOT the active tab — so the editor never appeared. Real fix: EditorExtension.activate now calls arrangement.openEditor() on editor.opened / active-changed(non-null) and closeEditor() on active-changed(null). Test asserts arrangement.editorOpen.', 'done', 'high', NULL, NULL, NULL, '2026-06-01 08:58:19', '2026-06-01 16:36:38', NULL, '01039a9e83c3112ca93e33c228763b50', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
+INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-202', 'bug', NULL, 'rate_limit_event with numeric resetsAt crashes the Claude session', 'stream_json_session._statusFromEvent cast info[''resetsAt''] as String?, but claude sends resetsAt as a unix-epoch NUMBER → ''int is not a subtype of String?'' unhandled in _onLine, killing the session''s line parsing. Fix: accept num (epoch seconds → DateTime.fromMillisecondsSinceEpoch) or String (ISO). Surfaced in a live session log.', 'done', 'high', NULL, NULL, NULL, '2026-06-01 16:48:31', '2026-06-01 16:48:56', NULL, '589320cb1ad6a97a3d91c090ce4f2112', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
+INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-203', 'bug', 'T-197', 'Editor split throws semantics + SelectableRegion exceptions on open', 'Opening the editor split (now that T-197 works) flooded two exceptions. (1) The _EditorDragHandle Semantics had slider:true + value + onIncrease/onDecrease but no increasedValue/decreasedValue → ''SemanticsNode with action increase needs both value and increasedValue'' on every flush; added increasedValue/decreasedValue. (2) Reparenting the Claude pane (direct child → Column/Expanded) when the split opens disposed its ClideSelectionArea/SelectableRegion subtree mid selection-update microtask → ''selectable not in this registrar'' + ''renderObject of inactive element''; fixed with a stable GlobalKey on the workspace primary so Flutter moves the element instead of disposing it.', 'done', 'high', NULL, NULL, NULL, '2026-06-01 16:48:31', '2026-06-01 16:48:56', NULL, '77c284e1d35358783bda17955abba6b8', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);

CHANGELOG.md

@@ -54,6 +54,12 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ### Fixed
 
+- Opening the editor split no longer floods exceptions: the resize handle's
+  slider semantics now carry increased/decreased values, and the Claude pane
+  keeps a stable identity across the reparent so its text-selection region
+  isn't torn down mid-update. (T-203)
+- A `rate_limit_event` whose `resetsAt` is a numeric epoch no longer crashes the
+  Claude session — it was cast as a string. (T-202)
 - 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

lib/app.dart

@@ -923,6 +923,15 @@ class _SidebarSlot extends StatelessWidget {
   }
 }
 
+// Stable identity for the workspace's primary pane (Claude). Opening the
+// editor reparents it from a direct child into a Column/Expanded; without a
+// stable key Flutter disposes + rebuilds the subtree, and the Claude
+// conversation's SelectableRegion then runs a pending selection update
+// against now-inactive elements ("selectable not in this registrar" /
+// "renderObject of inactive element"). The GlobalKey makes Flutter MOVE the
+// element instead, preserving the selection subtree.
+final GlobalKey _kWorkspacePrimary = GlobalKey(debugLabel: 'workspace.primary');
+
 class _WorkspaceSlot extends StatelessWidget {
   const _WorkspaceSlot({required this.tabs, required this.active});
 
@@ -944,9 +953,10 @@ class _WorkspaceSlot extends StatelessWidget {
 
         final claude = tabs.where((t) => t.id == _claudeTabId).firstOrNull;
         final primary = claude ?? active;
+        final primaryPane = KeyedSubtree(key: _kWorkspacePrimary, child: primary.build(ctx));
 
         if (!editorOpen || editorTab == null) {
-          return Container(color: tokens.panelBackground, child: primary.build(ctx));
+          return Container(color: tokens.panelBackground, child: primaryPane);
         }
 
         final ratio = kernel.arrangement.editorRatio;
@@ -960,7 +970,7 @@ class _WorkspaceSlot extends StatelessWidget {
                 children: [
                   SizedBox(height: editorHeight, child: editorTab.build(ctx)),
                   _EditorDragHandle(arrangement: kernel.arrangement, totalHeight: totalHeight),
-                  Expanded(child: primary.build(ctx)),
+                  Expanded(child: primaryPane),
                 ],
               );
             },
@@ -998,11 +1008,17 @@ class _EditorDragHandleState extends State<_EditorDragHandle> {
     final tokens = ClideTheme.of(context).surface;
     final lineColor = (_hovered || _focused) ? tokens.panelActiveBorder : tokens.panelBorder;
 
+    final ratio = widget.arrangement.editorRatio;
+    String pct(double r) => '${(r.clamp(0.15, 0.70) * 100).round()}%';
     return Semantics(
       container: true,
       slider: true,
       label: 'Editor split',
-      value: '${(widget.arrangement.editorRatio * 100).round()}%',
+      value: pct(ratio),
+      // increase/decrease actions require matching increased/decreased
+      // values, or Flutter asserts on every semantics flush.
+      increasedValue: pct(ratio + _stepFine),
+      decreasedValue: pct(ratio - _stepFine),
       onIncrease: () => _bump(_stepFine),
       onDecrease: () => _bump(-_stepFine),
       child: FocusableActionDetector(

lib/builtin/claude/src/stream_json_session.dart

@@ -597,17 +597,24 @@ class StreamJsonSession {
         final info = j['rate_limit_info'];
         if (info is Map) {
           final status = info['status'] as String?;
-          final resetsAt = info['resetsAt'] as String?;
+          // `resetsAt` may arrive as a unix-epoch number (seconds) or an
+          // ISO string depending on the claude build — accept both.
+          final resetsRaw = info['resetsAt'];
+          DateTime? resetsTime;
+          String? resetsText;
+          if (resetsRaw is num) {
+            resetsTime = DateTime.fromMillisecondsSinceEpoch((resetsRaw * 1000).round(), isUtc: true);
+          } else if (resetsRaw is String) {
+            resetsTime = DateTime.tryParse(resetsRaw);
+            resetsText = resetsRaw;
+          }
           if (status != null) {
             String label = 'rate limited';
-            if (resetsAt != null) {
+            if (resetsTime != null) {
-              // Show just the time portion if it's an ISO timestamp.
+              final t = resetsTime.toLocal();
-              final t = DateTime.tryParse(resetsAt);
+              label = 'rate limited — resets ${t.hour.toString().padLeft(2, '0')}:${t.minute.toString().padLeft(2, '0')}';
-              if (t != null) {
+            } else if (resetsText != null) {
-                label = 'rate limited — resets ${t.toLocal().hour.toString().padLeft(2, '0')}:${t.toLocal().minute.toString().padLeft(2, '0')}';
+              label = 'rate limited — resets $resetsText';
-              } else {
-                label = 'rate limited — resets $resetsAt';
-              }
             }
             return SessionStatus(rateLimitInfo: label);
           }

test/builtin/claude/stream_json_session_test.dart

@@ -271,6 +271,18 @@ void main() {
       expect(statuses.last.rateLimitInfo, contains('rate limited'));
       expect(statuses.last.rateLimitInfo, contains('resets'));
     });
+
+    test('rate_limit_event with a numeric (epoch) resetsAt does not crash', () async {
+      // Claude sends resetsAt as a unix-epoch number, not a string — the
+      // old `as String?` cast threw 'int is not a subtype of String?'.
+      proc.emit(jsonEncode({
+        'type': 'rate_limit_event',
+        'rate_limit_info': {'status': 'rate_limited', 'resetsAt': 1780000000},
+      }));
+      await Future<void>.delayed(Duration.zero);
+      expect(statuses.last.rateLimitInfo, contains('rate limited'));
+      expect(statuses.last.rateLimitInfo, contains('resets'));
+    });
   });
 
   group('token streaming via stream_event (T-168, shape verified by T-184)', () {