feat(tui): add safe session resume flow

packages/session-persistence/session-persistence-jsonl/tests/fixtures/live-lease-child.ts

@@ -0,0 +1,16 @@
+/** Child process that holds one JSONL live-session lease until it is killed. */
+
+import { writeFile } from 'node:fs/promises'
+import { Context } from 'cordis'
+import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
+import SessionPersistenceJsonl from '@deepseek-ai/dsh-session-persistence-jsonl'
+
+const [root, marker] = process.argv.slice(2)
+if (root === undefined || marker === undefined) throw new Error('usage: live-lease-child.ts <root> <marker>')
+
+const ctx = new Context()
+await ctx.plugin(SessionStore)
+await ctx.plugin(SessionPersistenceJsonl, { root, compression: 'none' })
+await ctx.sessionPersistence.claimLive(SessionId('leased-session'))
+await writeFile(marker, 'held')
+await new Promise<never>(() => { setInterval(() => {}, 60_000) })

packages/session-persistence/session-persistence-jsonl/tests/fixtures/live-lease-race-child.ts

@@ -0,0 +1,33 @@
+/** Child process competing to reclaim one stale JSONL live-session lease. */
+
+import { access, writeFile } from 'node:fs/promises'
+import { Context } from 'cordis'
+import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
+import SessionPersistenceJsonl from '@deepseek-ai/dsh-session-persistence-jsonl'
+
+const [root, gate, marker, rawId] = process.argv.slice(2)
+if (root === undefined || gate === undefined || marker === undefined || rawId === undefined) {
+  throw new Error('usage: live-lease-race-child.ts <root> <gate> <marker> <session-id>')
+}
+
+for (;;) {
+  try {
+    await access(gate)
+    break
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code !== 'ENOENT') throw error
+    await new Promise(resolve => setTimeout(resolve, 5))
+  }
+}
+
+const ctx = new Context()
+await ctx.plugin(SessionStore)
+await ctx.plugin(SessionPersistenceJsonl, { root, compression: 'none' })
+try {
+  await ctx.sessionPersistence.claimLive(SessionId(rawId))
+  await writeFile(marker, 'claimed')
+  await new Promise<never>(() => { setInterval(() => {}, 60_000) })
+} catch (error) {
+  await writeFile(marker, `rejected:${error instanceof Error ? error.message : String(error)}`)
+  await ctx.fiber.dispose()
+}