fix(sidebar): handle undefined sidebarProjectGroupingOverrides on stale settings

readClientSettings() loads client-settings.json as a raw JSON blob without
running the schema decoder, so users with pre-upgrade settings files have no
sidebarProjectGroupingOverrides key. Dereferencing it with bracket access
threw "Cannot read properties of undefined (reading '\${envId}:\${path}')"
and blocked the app from opening.

- resolveProjectGroupingMode: optional-chain the overrides record and fall
  back to DEFAULT_SIDEBAR_PROJECT_GROUPING_MODE when the mode itself is
  missing
- openProjectGroupingDialog: optional-chain the overrides lookup
- Grouping-rule Select "global default" label falls back to the default
  mode when settings.sidebarProjectGroupingMode is missing

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: tyulyukov

apps/web/src/components/Sidebar.tsx

@@ -39,6 +39,7 @@ import { CSS } from "@dnd-kit/utilities";
 import {
   type ContextMenuItem,
   DEFAULT_MODEL_BY_PROVIDER,
+  DEFAULT_SIDEBAR_PROJECT_GROUPING_MODE,
   type DesktopUpdateState,
   type EnvironmentId,
   ProjectId,
@@ -1266,7 +1267,7 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
       const overrideKey = deriveProjectGroupingOverrideKey(member);
       setProjectGroupingTarget(member);
       setProjectGroupingSelection(
-        projectGroupingSettings.sidebarProjectGroupingOverrides[overrideKey] ?? "inherit",
+        projectGroupingSettings.sidebarProjectGroupingOverrides?.[overrideKey] ?? "inherit",
       );
     },
     [projectGroupingSettings.sidebarProjectGroupingOverrides],
@@ -2089,7 +2090,7 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
                 <SelectTrigger className="w-full" aria-label="Project grouping rule">
                   <SelectValue>
                     {projectGroupingSelection === "inherit"
-                      ? `Use global default (${PROJECT_GROUPING_MODE_LABELS[projectGroupingSettings.sidebarProjectGroupingMode]})`
+                      ? `Use global default (${PROJECT_GROUPING_MODE_LABELS[projectGroupingSettings.sidebarProjectGroupingMode ?? DEFAULT_SIDEBAR_PROJECT_GROUPING_MODE]})`
                       : PROJECT_GROUPING_MODE_LABELS[projectGroupingSelection]}
                   </SelectValue>
                 </SelectTrigger>

apps/web/src/logicalProject.ts

@@ -1,5 +1,9 @@
 import { scopedProjectKey, scopeProjectRef } from "@marcode/client-runtime";
-import type { ScopedProjectRef, SidebarProjectGroupingMode } from "@marcode/contracts";
+import {
+  DEFAULT_SIDEBAR_PROJECT_GROUPING_MODE,
+  type ScopedProjectRef,
+  type SidebarProjectGroupingMode,
+} from "@marcode/contracts";
 import { normalizeProjectPathForComparison } from "./lib/projectPaths";
 import type { Project } from "./types";
 
@@ -70,8 +74,9 @@ export function resolveProjectGroupingMode(
   settings: ProjectGroupingSettings,
 ): SidebarProjectGroupingMode {
   return (
-    settings.sidebarProjectGroupingOverrides[deriveProjectGroupingOverrideKey(project)] ??
-    settings.sidebarProjectGroupingMode
+    settings.sidebarProjectGroupingOverrides?.[deriveProjectGroupingOverrideKey(project)] ??
+    settings.sidebarProjectGroupingMode ??
+    DEFAULT_SIDEBAR_PROJECT_GROUPING_MODE
   );
 }