feat: show scheduled prompts in session rows

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/hqt/tui/widgets/session_list.py

@@ -1,3 +1,6 @@
+from datetime import datetime
+from math import ceil
+
 from rich.markup import escape
 from textual.app import ComposeResult
 from textual.message import Message
@@ -28,12 +31,23 @@ _STATUS_COLORS: dict[str, str] = {
 }
 
 
+def format_scheduled_prompt(due_at: datetime, now: datetime | None = None) -> str:
+    if now is None:
+        now = datetime.now()
+    seconds = max(0, (due_at - now).total_seconds())
+    if seconds < 3600:
+        return f"@ {max(1, ceil(seconds / 60))}m"
+    return f"@ {due_at.strftime('%H:%M')}"
+
+
 def format_session_text(
     nickname: str,
     harness_name: str,
     status_text: str,
     symbol: str,
     worktree_branch: str | None = None,
+    scheduled_prompt=None,
+    now: datetime | None = None,
 ) -> str:
     color = _STATUS_COLORS.get(status_text, "#c6d0f5")  # default: Text
     name = nickname
@@ -47,7 +61,10 @@ def format_session_text(
         else:
             name = f"{nickname} ⎇ {worktree_branch}"
     label = escape(f"{name} [{harness_name}]")
-    return f"[{color}]{symbol}[/] {label} {status_text}"
+    schedule = ""
+    if scheduled_prompt is not None:
+        schedule = f"  {format_scheduled_prompt(scheduled_prompt.due_at, now=now)}"
+    return f"[{color}]{symbol}[/] {label} {status_text}{schedule}"
 
 
 class SessionList(Widget, can_focus=False):
@@ -71,6 +88,7 @@ class SessionList(Widget, can_focus=False):
                 status_text,
                 symbol,
                 getattr(s, "worktree_branch", None),
+                scheduled_prompt=getattr(info, "scheduled_prompt", None),
             )
             new_items.append((f"sess-{s.id}", text, s.id))
 

tests/test_tui.py

@@ -1032,6 +1032,51 @@ def test_format_session_text_status_colors():
     )  # Overlay0
 
 
+def _make_scheduled_prompt(due_at):
+    prompt = MagicMock()
+    prompt.due_at = due_at
+    prompt.status = "pending"
+    return prompt
+
+
+def test_format_session_text_shows_scheduled_prompt_countdown():
+    from datetime import datetime, timedelta
+    from hqt.tui.widgets.session_list import format_session_text
+
+    now = datetime(2026, 6, 11, 14, 0, 0)
+    scheduled = _make_scheduled_prompt(now + timedelta(minutes=12, seconds=1))
+
+    text = format_session_text(
+        "mywork",
+        "claude",
+        "idle",
+        "●",
+        scheduled_prompt=scheduled,
+        now=now,
+    )
+
+    assert "@ 13m" in text
+
+
+def test_format_session_text_shows_scheduled_prompt_clock_time():
+    from datetime import datetime, timedelta
+    from hqt.tui.widgets.session_list import format_session_text
+
+    now = datetime(2026, 6, 11, 14, 0, 0)
+    scheduled = _make_scheduled_prompt(now + timedelta(hours=2, minutes=30))
+
+    text = format_session_text(
+        "mywork",
+        "claude",
+        "idle",
+        "●",
+        scheduled_prompt=scheduled,
+        now=now,
+    )
+
+    assert "@ 16:30" in text
+
+
 @pytest.mark.asyncio
 async def test_session_list_renders_harness_name_brackets():
     """Regression: '[claude]' must be visible, not swallowed as a markup tag."""