feat: persist conversations, isolate sessions, and fix request-pipeline reliability

src/__tests__/accounts.test.ts

@@ -8,7 +8,14 @@ mock.module('../plugin/storage/sqlite.js', () => ({
     getAccounts: () => [],
     upsertAccount: () => Promise.resolve(),
     deleteAccount: () => Promise.resolve(),
-    batchUpsertAccounts: () => Promise.resolve()
+    batchUpsertAccounts: () => Promise.resolve(),
+    // mock.module() registers globally for the whole bun test run, not just
+    // this file, so this stub must cover every kiroDb method any other test
+    // file's code path might hit — otherwise a different test file silently
+    // fails depending on run order (see #tool-compatibility.test.ts).
+    getConversationId: () => undefined,
+    setConversationId: () => {},
+    deleteConversationId: () => {}
   }
 }))
 mock.module('../plugin/sync/kiro-cli.js', () => ({

src/__tests__/bearer-retry.test.ts

@@ -60,6 +60,10 @@ function createHarness() {
   const accountManager: any = {
     getAccounts: () => [account],
     getAccountCount: () => 1,
+    markUnhealthy: (acc: any, reason: string) => {
+      acc.isHealthy = false
+      acc.unhealthyReason = reason
+    },
     toAuthDetails: (selected: any) => ({
       access: selected.accessToken,
       refresh: selected.refreshToken,