fix(team): surface unreadable bootstrap journal warnings

src/main/services/team/TeamBootstrapStateReader.ts

@@ -363,7 +363,11 @@ async function readBootstrapLockMetadata(teamName: string): Promise<BootstrapLoc
 }
 
 async function readBootstrapJournalWarnings(teamName: string): Promise<string[] | undefined> {
-  return (await inspectBootstrapJournal(teamName)).warnings;
+  const inspection = await inspectBootstrapJournal(teamName);
+  const warnings = [inspection.issue, ...(inspection.warnings ?? [])].filter(
+    (item): item is string => typeof item === 'string' && item.trim().length > 0
+  );
+  return warnings.length > 0 ? warnings : undefined;
 }
 
 async function inspectBootstrapJournal(teamName: string): Promise<BootstrapJournalInspection> {
@@ -436,6 +440,13 @@ async function inspectBootstrapJournal(teamName: string): Promise<BootstrapJourn
       })
       .filter((item): item is string => Boolean(item));
 
+    if (lines.length > 0 && messages.length === 0) {
+      return {
+        issue:
+          'Persisted deterministic bootstrap journal is unreadable because bootstrap-journal.jsonl is invalid, truncated, or inaccessible.',
+      };
+    }
+
     return {
       warnings:
         messages.length > 0

test/main/services/team/TeamBootstrapStateReader.test.ts

@@ -142,6 +142,41 @@ describe('TeamBootstrapStateReader', () => {
     nowSpy.mockRestore();
   });
 
+  it('surfaces unreadable bootstrap journal as a warning without breaking active recovery', async () => {
+    const killSpy = vi.spyOn(process, 'kill').mockImplementation(() => true as never);
+
+    hoisted.files.set('/mock/teams/demo/bootstrap-state.json', {
+      contents: JSON.stringify({
+        version: 1,
+        runId: 'run-123',
+        teamName: 'demo',
+        ownerPid: 4242,
+        startedAt: 1700000000000,
+        updatedAt: 1700000000500,
+        phase: 'spawning_members',
+        members: [{ name: 'alice', status: 'pending' }],
+      }),
+    });
+    hoisted.files.set('/mock/teams/demo/bootstrap-journal.jsonl', {
+      contents: '{invalid-json',
+    });
+
+    await expect(readBootstrapRuntimeState('demo')).resolves.toMatchObject({
+      teamName: 'demo',
+      isAlive: false,
+      runId: 'run-123',
+      progress: {
+        state: 'assembling',
+        message: 'Spawning teammate runtimes (1)',
+        warnings: [
+          'Persisted deterministic bootstrap journal is unreadable because bootstrap-journal.jsonl is invalid, truncated, or inaccessible.',
+        ],
+      },
+    });
+
+    killSpy.mockRestore();
+  });
+
   it('ignores terminal bootstrap-state for runtime recovery projection', async () => {
     hoisted.files.set('/mock/teams/demo/bootstrap-state.json', {
       contents: JSON.stringify({