feat(M5): command history/library + completion + session logs

- main/commands.ts: JSON-backed history (500 cap, dedupe), command library
  CRUD, per-session plain-text output logs (start/stop/index/open dir)
- pty data path feeds the session logger via injected hooks
- TerminalView: input line capture -> history recording, prefix completion
  popup (history + library, Tab/Arrows/Esc), session log toggle buttons
- Sidebar: 命令 section — history (click to run, clear) and library
  (add/delete, click to run into active session)
- tests: commands-store self-test ALL PASSED; full suite green

src/main/pty.ts

@@ -13,6 +13,38 @@ import { registerSftpClientProvider, closeSftp } from './sftp'
 // M3 polling engine without importing src/main/sysinfo.ts separately.
 export { startPolling, stopPolling } from './sysinfo'
 
+/**
+ * M5 command-store / log-service hooks (injected once by ipc.ts). Mirrors the
+ * sysinfo injection pattern so pty.ts routes PTY data into the session log
+ * without importing the store directly. `log` runs on every onData chunk (the
+ * logger itself decides whether a session is actively logging), `stop` runs on
+ * session close / kill to finalize the log file.
+ */
+type DataLogger = (id: string, data: string) => void
+let dataLogger: DataLogger | undefined
+let logStopper: (id: string) => void | undefined
+
+export function registerLogHooks(log: DataLogger, stop: (id: string) => void): void {
+  dataLogger = log
+  logStopper = stop
+}
+
+function safeLog(id: string, data: string): void {
+  try {
+    dataLogger?.(id, data)
+  } catch {
+    // never crash the event loop
+  }
+}
+
+function safeStopLog(id: string): void {
+  try {
+    logStopper?.(id)
+  } catch {
+    // never crash the event loop
+  }
+}
+
 /**
  * Session routing table. A session is either a local pty or an established ssh
  * shell; the generic PTY_* (data plane) channels address both. PTY_DATA /
@@ -115,6 +147,7 @@ export function createPty(opts: PtyCreateOptions = {}): PtyCreateResult {
   pty.onData((data) => {
     try {
       appendReplay(id, data)
+      safeLog(id, data)
       broadcast(Ipc.PTY_DATA, { id, data })
     } catch {
       // never crash the event loop
@@ -124,6 +157,7 @@ export function createPty(opts: PtyCreateOptions = {}): PtyCreateResult {
   pty.onExit(({ exitCode }) => {
     try {
       sessions.delete(id)
+      safeStopLog(id)
       broadcast(Ipc.PTY_EXIT, { id, exitCode })
     } catch {
       // never crash the event loop
@@ -173,6 +207,7 @@ export async function openSession(opts: SessionOpenOptions): Promise<{ id: strin
     try {
       const text = data.toString('utf8')
       appendReplay(handle.id, text)
+      safeLog(handle.id, text)
       deps.broadcast(Ipc.PTY_DATA, { id: handle.id, data: text })
     } catch {
       // never crash the event loop
@@ -183,6 +218,7 @@ export async function openSession(opts: SessionOpenOptions): Promise<{ id: strin
     try {
       stopPolling(handle.id)
       closeSftp(handle.id)
+      safeStopLog(handle.id)
       sessions.delete(handle.id)
       deps.broadcast(Ipc.PTY_EXIT, { id: handle.id, exitCode: 0 })
     } catch {
@@ -220,6 +256,7 @@ export function killPty(id: string): void {
   stopPolling(id)
   closeSftp(id)
   closeSftp(id)
+  safeStopLog(id)
   replayBuffers.delete(id)
   const session = sessions.get(id)
   if (!session) return
@@ -248,6 +285,7 @@ export function killAllPtys(): void {
   for (const id of sessions.keys()) {
     stopPolling(id)
     closeSftp(id)
+    safeStopLog(id)
     const session = sessions.get(id)
     if (!session) continue
     if (session.kind === 'ssh') {