fix(teams): resolve dividers from tab name + full title, not last notice row

Section titles are stacked single-cell rows: the "TipiLAN 2026 CS2" title
sits above notice rows ("If a team withdraws..."), and parse_team_sections
kept only the LAST one, so the notice clobbered the title and resolve_divider
saw no game/year keywords -> None -> teams never positioned.

- parse_team_sections now accumulates all single-cell rows above a header, so
  the game/year title survives alongside the notices.
- _refresh_teams_sync resolves the divider from "<tab name> <section title>",
  so the game is taken reliably from the CS2/LoL worksheet name while the year
  still comes from the title, keeping year-scoped TEAM_DIVIDER_*_2026 vars.
- regression test: title survives notice rows and still resolves.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XPRsW4tazVtYi2jNzVQkre

tests/test_team_sync.py

@@ -142,6 +142,22 @@ def test_resolve_divider_no_config_or_no_title_is_none():
     assert sheets.resolve_divider("", DIVIDERS) is None
 
 
+def test_title_survives_notice_rows_below_it():
+    # Real sheets stack the game/year title above single-cell notice rows; the
+    # title's keywords must survive so resolve_divider still matches (regression:
+    # notice rows used to overwrite the title, yielding a None divider).
+    rows = [
+        ["TipiLAN 2026 CS2 Registration Log"] + [""] * 4,
+        ["This log is updated automatically."] + [""] * 4,
+        ["If a team from the Top 32 withdraws, ..."] + [""] * 4,
+        ["No", "Team Name", "Lineup (nickname, citizenship)", "", ""],
+        ["1", "GENESIS", "kapa (EST)", "", ""],
+    ]
+    section = sheets.parse_team_sections(rows)[0]
+    assert "CS2" in section.title and "2026" in section.title
+    assert sheets.resolve_divider(section.title, DIVIDERS) == 1498736834656604251
+
+
 # --- plan_team_positions (pure role-ordering maths) ------------------------
 
 def test_plan_moves_teams_directly_under_their_divider():