fix: align web test fixtures with ServerProvider contract additions (#1)

- Remove obsolete props (hasMessages, scrollContainer, nowIso, etc.) from
  MessagesTimeline handoff test; use buildProps() spread like sibling tests.
- Add slashCommands/skills empty arrays to provider fixtures in
  SettingsPanels.browser.tsx and composerDraftStore.test.ts to satisfy
  the ServerProvider schema fields added via withDecodingDefault.

Author: Berkay2002

apps/web/src/components/chat/MessagesTimeline.test.tsx

@@ -164,11 +164,7 @@ describe("MessagesTimeline", () => {
     const { MessagesTimeline } = await import("./MessagesTimeline");
     const markup = renderToStaticMarkup(
       <MessagesTimeline
-        hasMessages
-        isWorking={false}
-        activeTurnInProgress={false}
-        activeTurnStartedAt={null}
-        scrollContainer={null}
+        {...buildProps()}
         timelineEntries={[
           {
             id: "entry-1",
@@ -187,24 +183,6 @@ describe("MessagesTimeline", () => {
             },
           },
         ]}
-        completionDividerBeforeEntryId={null}
-        completionSummary={null}
-        turnDiffSummaryByAssistantMessageId={new Map()}
-        nowIso="2026-03-17T19:12:30.000Z"
-        expandedWorkGroups={{}}
-        onToggleWorkGroup={() => {}}
-        changedFilesExpandedByTurnId={{}}
-        onSetChangedFilesExpanded={() => {}}
-        onOpenTurnDiff={() => {}}
-        revertTurnCountByUserMessageId={new Map()}
-        onRevertUserMessage={() => {}}
-        isRevertingCheckpoint={false}
-        onImageExpand={() => {}}
-        activeThreadEnvironmentId={ACTIVE_THREAD_ENVIRONMENT_ID}
-        markdownCwd={undefined}
-        resolvedTheme="light"
-        timestampFormat="locale"
-        workspaceRoot={undefined}
       />,
     );
 

apps/web/src/components/settings/SettingsPanels.browser.tsx

@@ -725,6 +725,8 @@ describe("GeneralSettingsPanel observability", () => {
           auth: { status: "authenticated", label: "ChatGPT Pro Subscription" },
           checkedAt: "2026-04-04T00:00:00.000Z",
           models: [],
+          slashCommands: [],
+          skills: [],
           usageLimits: {
             updatedAt: "2026-04-04T00:00:00.000Z",
             windows: [
@@ -779,6 +781,8 @@ describe("GeneralSettingsPanel observability", () => {
           auth: { status: "authenticated", label: "Claude Pro Subscription" },
           checkedAt: "2026-04-04T00:00:00.000Z",
           models: [],
+          slashCommands: [],
+          skills: [],
           usageLimits: {
             updatedAt: "2026-04-04T00:00:00.000Z",
             windows: [
@@ -819,6 +823,8 @@ describe("GeneralSettingsPanel observability", () => {
           auth: { status: "authenticated" },
           checkedAt: "2026-04-04T00:00:00.000Z",
           models: [],
+          slashCommands: [],
+          skills: [],
         },
       ],
     });

apps/web/src/composerDraftStore.test.ts

@@ -125,6 +125,8 @@ const TEST_PROVIDERS: ServerProvider[] = [
       { slug: "gpt-5.4", name: "GPT-5.4", isCustom: false, capabilities: null },
       { slug: "gpt-5.4-mini", name: "GPT-5.4 Mini", isCustom: false, capabilities: null },
     ],
+    slashCommands: [],
+    skills: [],
   },
   {
     provider: "claudeAgent",
@@ -134,6 +136,8 @@ const TEST_PROVIDERS: ServerProvider[] = [
     status: "ready",
     auth: { status: "authenticated" },
     checkedAt: "2026-04-10T00:00:00.000Z",
+    slashCommands: [],
+    skills: [],
     models: [
       {
         slug: "claude-opus-4-6",