fix(#2732): enhance notification for failed/crashed subagent tasks

- completedTaskSummaries now includes status and error info
- notifyParentSession: noReply=false for failed tasks so parent reacts
- Batch notification distinguishes successful vs failed/cancelled tasks
- notification-template updated to show task errors
- task-poller: session-gone tests (85 new lines)
- CI: add Bun shim to PATH for legacy plugin migration tests

src/hooks/legacy-plugin-toast/auto-migrate.test.ts

@@ -10,12 +10,10 @@ describe("autoMigrateLegacyPluginEntry", () => {
   beforeEach(() => {
     testConfigDir = join(tmpdir(), `omo-legacy-migrate-${Date.now()}-${Math.random().toString(36).slice(2)}`)
     mkdirSync(testConfigDir, { recursive: true })
-    process.env.OPENCODE_CONFIG_DIR = testConfigDir
   })
 
   afterEach(() => {
     rmSync(testConfigDir, { recursive: true, force: true })
-    delete process.env.OPENCODE_CONFIG_DIR
   })
 
   describe("#given opencode.json has a bare legacy plugin entry", () => {
@@ -27,7 +25,7 @@ describe("autoMigrateLegacyPluginEntry", () => {
       )
 
       // when
-      const result = autoMigrateLegacyPluginEntry()
+      const result = autoMigrateLegacyPluginEntry(testConfigDir)
 
       // then
       expect(result.migrated).toBe(true)
@@ -47,7 +45,7 @@ describe("autoMigrateLegacyPluginEntry", () => {
       )
 
       // when
-      const result = autoMigrateLegacyPluginEntry()
+      const result = autoMigrateLegacyPluginEntry(testConfigDir)
 
       // then
       expect(result.migrated).toBe(true)
@@ -67,7 +65,7 @@ describe("autoMigrateLegacyPluginEntry", () => {
       )
 
       // when
-      const result = autoMigrateLegacyPluginEntry()
+      const result = autoMigrateLegacyPluginEntry(testConfigDir)
 
       // then
       expect(result.migrated).toBe(true)
@@ -81,7 +79,7 @@ describe("autoMigrateLegacyPluginEntry", () => {
       // given - empty dir
 
       // when
-      const result = autoMigrateLegacyPluginEntry()
+      const result = autoMigrateLegacyPluginEntry(testConfigDir)
 
       // then
       expect(result.migrated).toBe(false)
@@ -98,7 +96,7 @@ describe("autoMigrateLegacyPluginEntry", () => {
       )
 
       // when
-      const result = autoMigrateLegacyPluginEntry()
+      const result = autoMigrateLegacyPluginEntry(testConfigDir)
 
       // then
       expect(result.migrated).toBe(true)
@@ -116,7 +114,7 @@ describe("autoMigrateLegacyPluginEntry", () => {
       writeFileSync(join(testConfigDir, "opencode.json"), original)
 
       // when
-      const result = autoMigrateLegacyPluginEntry()
+      const result = autoMigrateLegacyPluginEntry(testConfigDir)
 
       // then
       expect(result.migrated).toBe(false)

src/hooks/legacy-plugin-toast/auto-migrate.ts

@@ -1,4 +1,5 @@
 import { existsSync, readFileSync, writeFileSync } from "node:fs"
+import { join } from "node:path"
 
 import { parseJsoncSafe } from "../../shared/jsonc-parser"
 import { getOpenCodeConfigPaths } from "../../shared/opencode-config-dir"
@@ -31,15 +32,23 @@ function toLegacyCanonical(entry: string): string {
   return entry
 }
 
-function detectOpenCodeConfigPath(): string | null {
+function detectOpenCodeConfigPath(overrideConfigDir?: string): string | null {
+  if (overrideConfigDir) {
+    const jsoncPath = join(overrideConfigDir, "opencode.jsonc")
+    const jsonPath = join(overrideConfigDir, "opencode.json")
+    if (existsSync(jsoncPath)) return jsoncPath
+    if (existsSync(jsonPath)) return jsonPath
+    return null
+  }
+
   const paths = getOpenCodeConfigPaths({ binary: "opencode", version: null })
   if (existsSync(paths.configJsonc)) return paths.configJsonc
   if (existsSync(paths.configJson)) return paths.configJson
   return null
 }
 
-export function autoMigrateLegacyPluginEntry(): MigrationResult {
-  const configPath = detectOpenCodeConfigPath()
+export function autoMigrateLegacyPluginEntry(overrideConfigDir?: string): MigrationResult {
+  const configPath = detectOpenCodeConfigPath(overrideConfigDir)
   if (!configPath) return { migrated: false, from: null, to: null, configPath: null }
 
   try {