[PATCH RFC v2 23/25] review-tui: give the unseen badge a column of its own

The Msgs column packs the thread total and the unseen badge into adjacent
fields, so a two-digit total and a badge render as "15(3)" and read as a
single number.

Put a separator between them and widen the badge to four columns, so a
two-digit unseen count still fits, and move the header label over the
field it now describes.

Assisted-by: claude-opus-5
Signed-off-by: Christian Brauner (Amutable) <[email protected]>
---
 src/b4/review_tui/_tracking_app.py | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/b4/review_tui/_tracking_app.py b/src/b4/review_tui/_tracking_app.py
index 53466498..37377758 100644
--- a/src/b4/review_tui/_tracking_app.py
+++ b/src/b4/review_tui/_tracking_app.py
@@ -772,7 +772,13 @@ def _append_msgs(
     message_count: Optional[int],
     seen_message_count: Optional[int],
 ) -> None:
-    """Append the Msgs column (total + unseen badge) to *label*."""
+    """Append the Msgs column (total + unseen badge) to *label*.
+
+    Ten columns: two of lead-in, three for the total, a separator, four for
+    the badge.  The separator is what keeps a two-digit total and a badge
+    from reading as one number, and the badge is four wide so a two-digit
+    unseen count still fits inside the field.
+    """
     base, badge, base_accent = _msgs_fields(message_count, seen_message_count)
     base_style = ''
     badge_style = ''
@@ -783,7 +789,8 @@ def _append_msgs(
         if badge:
             badge_style = accent
     label.append(f'  {base.rjust(3)}', style=base_style)
-    label.append(f'{badge:<3s}', style=badge_style)
+    label.append(' ')
+    label.append(f'{badge:<4s}', style=badge_style)
 
 
 class TrackedSeriesItem(ListItem):
@@ -1432,7 +1439,7 @@ class TrackingApp(LoreNodeShutdownMixin, CheckRunnerMixin, App[Optional[str]]):
                 await self.mount(empty, before=self.query_one(Footer))
                 return
 
-            header_text = f'{"Submitter":<20s}{"A":>1s} {"A·R·T":>7s}  {"Msgs":>6s}  {"S":<4s}{"Subject"}'
+            header_text = f'{"Submitter":<20s}{"A":>1s} {"A·R·T":>7s}  {"Msgs":<8s}{"S":<6s}{"Subject"}'
             header = Static(header_text, id='tracking-header')
 
             list_items: List[ListItem] = [TrackedSeriesItem(s) for s in display_series]

-- 
2.53.0