fix(telegram): exclude row-label column from bullet items in table rendering

When a GFM table has a row-label column (first column with no header),
_render_table_block_for_telegram incorrectly included the row-label cell
in the bullet zip alongside the data cells, producing a spurious bullet
like '• 維度: 核心賣點' before the real data rows.

Detect the row-label column by comparing the first data row cell count
against the header count (has_row_label_col = len(first_data_row) ==
len(headers) + 1). When present, use cells[0] as the heading and
zip headers against cells[1:] only, correctly excluding the row-label
from the bullet list.

Fixes #22604

gateway/platforms/telegram.py

@@ -180,18 +180,32 @@ def _render_table_block_for_telegram(table_block: list[str]) -> str:
     if len(headers) < 2:
         return "\n".join(table_block)
 
+    # Detect row-label column: present when data rows have one more cell
+    # than the header row (the row-label column carries no header).
+    first_data_row = _split_markdown_table_row(table_block[2]) if len(table_block) > 2 else []
+    has_row_label_col = len(first_data_row) == len(headers) + 1
+
     rendered_rows: list[str] = []
     for index, row in enumerate(table_block[2:], start=1):
         cells = _split_markdown_table_row(row)
-        if len(cells) < len(headers):
-            cells.extend([""] * (len(headers) - len(cells)))
-        elif len(cells) > len(headers):
-            cells = cells[: len(headers)]
-
+        if has_row_label_col:
+            # First cell is the row-label (heading); remaining cells align with headers.
+            heading = cells[0] if cells and cells[0] else f"Row {index}"
+            data_cells = cells[1:]
+        else:
+            # No row-label column: use first non-empty cell as heading.
             heading = next((cell for cell in cells if cell), f"Row {index}")
+            data_cells = cells
+
+        # Pad or trim data_cells to match headers length.
+        if len(data_cells) < len(headers):
+            data_cells.extend([""] * (len(headers) - len(data_cells)))
+        elif len(data_cells) > len(headers):
+            data_cells = data_cells[: len(headers)]
+
         rendered_rows.append(f"**{heading}**")
         rendered_rows.extend(
-            f"• {header}: {value}" for header, value in zip(headers, cells)
+            f"• {header}: {value}" for header, value in zip(headers, data_cells)
         )
 
     return "\n\n".join(rendered_rows)