simplify per-game table: tracked player only, no rating diff column

Reworked the per-game row layout to be relative to the tracked player
instead of white/black: the tracked player's name+accuracy+rating are
always shown first, the opponent's rating+accuracy (no name) always
second, regardless of which color each side played in a given game -
this keeps columns aligned across rows even as the tracked player
switches sides. Dropped the rating-change-per-game column added
earlier; it pushed the line past mobile width limits.

LichessClientTG_bot/formatters.py

@@ -47,22 +47,14 @@ class StatsFormatter:
         tracked_won = (result == "1-0" and tracked_is_white) or (result == "0-1" and not tracked_is_white)
         return "🟢" if tracked_won else "🔴"
 
-    @staticmethod
-    def _format_rating_diff_paren(diff: Optional[int]) -> str:
-        """Format the tracked user's rating change for this game, e.g. '(+5)' / '(-7)' / '(0)'"""
-        diff = diff or 0
-        if diff > 0:
-            return f"(+{diff})"
-        elif diff < 0:
-            return f"({diff})"
-        else:
-            return "(0)"
-
     @staticmethod
     def _format_game_rows_block(rows: list) -> str:
         """
         Format a list of individual game rows as a column-aligned, monospace table:
-        outcome | rating_diff | accuracy1 | White | rating1 | result | Black | rating2 | accuracy2
+        outcome | accuracy(tracked) | name(tracked) | rating(tracked) | result | rating(opponent) | accuracy(opponent)
+
+        Only the tracked player is named — the opponent is shown by rating/accuracy
+        only, keeping the line short enough for mobile screens.
 
         Column widths are computed from the actual data so every column lines up
         character-for-character. Caller is expected to wrap the result in a
@@ -76,29 +68,36 @@ class StatsFormatter:
         prepared = []
         for row in rows:
             circle = StatsFormatter._format_row_outcome_circle(row)
-            diff_str = StatsFormatter._format_rating_diff_paren(row.get('tracked_rating_diff'))
-            white = (row.get('white_name') or '?')[:NAME_WIDTH]
-            black = (row.get('black_name') or '?')[:NAME_WIDTH]
-            wr = row.get('white_rating')
-            br = row.get('black_rating')
-            wr_str = str(wr) if wr is not None else "-"
-            br_str = str(br) if br is not None else "-"
-            wa = StatsFormatter._format_accuracy(row.get('white_accuracy'))
-            ba = StatsFormatter._format_accuracy(row.get('black_accuracy'))
+            if row.get('tracked_is_white') is False:
+                tracked_name = row.get('black_name') or '?'
+                tracked_rating = row.get('black_rating')
+                tracked_accuracy = row.get('black_accuracy')
+                opp_rating = row.get('white_rating')
+                opp_accuracy = row.get('white_accuracy')
+            else:
+                tracked_name = row.get('white_name') or '?'
+                tracked_rating = row.get('white_rating')
+                tracked_accuracy = row.get('white_accuracy')
+                opp_rating = row.get('black_rating')
+                opp_accuracy = row.get('black_accuracy')
+            tracked_name = tracked_name[:NAME_WIDTH]
+            tr_str = str(tracked_rating) if tracked_rating is not None else "-"
+            or_str = str(opp_rating) if opp_rating is not None else "-"
+            ta = StatsFormatter._format_accuracy(tracked_accuracy)
+            oa = StatsFormatter._format_accuracy(opp_accuracy)
             result = StatsFormatter._format_result(row.get('result', ''))
-            prepared.append((circle, diff_str, wa, white, wr_str, result, black, br_str, ba))
+            prepared.append((circle, ta, tracked_name, tr_str, result, or_str, oa))
 
-        diff_width = max(len(p[1]) for p in prepared)
-        acc_width = max(max(len(p[2]), len(p[8])) for p in prepared)
+        acc_width = max(max(len(p[1]), len(p[6])) for p in prepared)
         name_width = NAME_WIDTH
-        rating_width = max(max(len(p[4]), len(p[7])) for p in prepared)
-        result_width = max(len(p[5]) for p in prepared)
+        rating_width = max(max(len(p[3]), len(p[5])) for p in prepared)
+        result_width = max(len(p[4]) for p in prepared)
 
         lines = []
-        for circle, diff_str, wa, white, wr_str, result, black, br_str, ba in prepared:
+        for circle, ta, tracked_name, tr_str, result, or_str, oa in prepared:
             lines.append(
-                f"{circle} {diff_str:>{diff_width}} {wa:>{acc_width}} {white:<{name_width}} {wr_str:>{rating_width}} "
-                f"{result:^{result_width}} {black:<{name_width}} {br_str:>{rating_width}} {ba:>{acc_width}}"
+                f"{circle} {ta:>{acc_width}} {tracked_name:<{name_width}} {tr_str:>{rating_width}} "
+                f"{result:^{result_width}} {or_str:>{rating_width}} {oa:>{acc_width}}"
             )
         return "\n".join(lines)