fix(tui): /history shows the TUI's own transcript, scrollable

Reported during TUI v2 blitz retest: `/history` in the TUI only shows
prompts from non-TUI Hermes runs and can't scroll the window.  Root
cause is the slash-worker subprocess: it's a detached HermesCLI that
never sees the TUI's turns, so its `conversation_history` starts empty
and `show_history` surfaces whatever was persisted from earlier CLI
sessions — not what the user just did inside the TUI.

Intercept `/history` as a local slash command so it dumps
`ctx.local.getHistoryItems()` — the TUI's own transcript — routed
through the pager (which scrolls after #13591).  Accepts an optional
preview-length argument (default 400 chars per message).

Adds createSlashHandler coverage.

ui-tui/src/__tests__/createSlashHandler.test.ts

@@ -211,6 +211,42 @@ describe('createSlashHandler', () => {
     expect(ctx.transcript.send).toHaveBeenCalledWith(skillMessage)
   })
 
+  it('/history pages the current TUI transcript (user + assistant)', () => {
+    const ctx = buildCtx({
+      local: {
+        ...buildLocal(),
+        getHistoryItems: vi.fn(() => [
+          { role: 'user', text: 'hello' },
+          { role: 'system', text: 'ignore me' },
+          { role: 'assistant', text: 'hi there' },
+          { role: 'user', text: 'test' }
+        ])
+      }
+    })
+
+    createSlashHandler(ctx)('/history')
+    expect(ctx.transcript.page).toHaveBeenCalledTimes(1)
+
+    const [body, title] = ctx.transcript.page.mock.calls[0]!
+
+    expect(title).toBe('History')
+    expect(body).toContain('[You #1]')
+    expect(body).toContain('hello')
+    expect(body).toContain('[Hermes #2]')
+    expect(body).toContain('hi there')
+    expect(body).toContain('[You #3]')
+    expect(body).not.toContain('ignore me')
+    expect(ctx.gateway.gw.request).not.toHaveBeenCalled()
+  })
+
+  it('/history reports empty state without paging', () => {
+    const ctx = buildCtx()
+
+    createSlashHandler(ctx)('/history')
+    expect(ctx.transcript.page).not.toHaveBeenCalled()
+    expect(ctx.transcript.sys).toHaveBeenCalledWith('no conversation yet')
+  })
+
   it('handles send-type dispatch for /plan command', async () => {
     const planMessage = 'Plan skill content loaded'
 

ui-tui/src/app/slash/commands/core.ts

@@ -275,6 +275,34 @@ export const coreCommands: SlashCommand[] = [
     }
   },
 
+  {
+    help: 'view current transcript (user + assistant messages)',
+    name: 'history',
+    run: (arg, ctx) => {
+      // The CLI-side `/history` runs in a detached slash-worker subprocess
+      // that never sees the TUI's turns — it only surfaces whatever was
+      // persisted before this process started.  Render the TUI's own
+      // transcript so `/history` actually reflects what the user just did.
+      const items = ctx.local.getHistoryItems().filter(m => m.role === 'user' || m.role === 'assistant')
+
+      if (!items.length) {
+        return ctx.transcript.sys('no conversation yet')
+      }
+
+      const preview = Math.max(80, parseInt(arg, 10) || 400)
+
+      const lines = items.map((m, i) => {
+        const tag = m.role === 'user' ? `You #${i + 1}` : `Hermes #${i + 1}`
+        const body = m.text.trim() || (m.tools?.length ? `(${m.tools.length} tool calls)` : '(empty)')
+        const clipped = body.length > preview ? `${body.slice(0, preview).trimEnd()}…` : body
+
+        return `[${tag}]\n${clipped}`
+      })
+
+      ctx.transcript.page(lines.join('\n\n'), 'History')
+    }
+  },
+
   {
     aliases: ['sb'],
     help: 'toggle status bar',