docs: fill a glossary gap the survey missed -- combat page monster level

combat-page.component.html's "Stufe {{ combat.monster.level }}" fighter
badge was found by the original content survey but never made it into
the design doc's Combat glossary section, so Task 5's brief never
carried it. Task 5's implementer correctly left the string untouched
rather than inventing a translation without direction -- exactly the
right call.

Adds the missing row now: "Level {{ combat.monster.level }}", the same
treatment as the identical monster-level display already specified for
encounter-card.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/superpowers/specs/2026-08-21-english-game-content-foundation-design.md

@@ -139,6 +139,7 @@ Loot table `name` (internal, not currently player-visible, translated anyway for
 - Buttons: Angriff → **Attack**; Schwerer Hieb → **Heavy Strike**; Schildstoß → **Shield Bash**; Verteidigen → **Defend**; Trank → **Potion**; (Flee is listed in the spec but not yet implemented in this codebase — no change needed, nothing to translate).
 - Round header: "Runde {{n}}" → **"Round {{n}}"**.
 - Outcome headings: "Sieg" → **"Victory"**; "Niederlage" → **"Defeat"**.
+- Monster level badge: "Stufe {{ combat.monster.level }}" → **"Level {{ combat.monster.level }}"** (missed by the original survey pass in this section; same treatment as the identical monster-level display in the Hunting section below — `monster.level` is a surviving monster stat, not the abolished character level).
 - Rewards panel: "Belohnungen" → **"Rewards"**; "Beute" → **"Loot"**; "Keine besondere Beute gefunden." → **"No notable loot found."**; "Silber" → **"Silver"**.
 - Post-combat buttons: "Weiter jagen" → **"Keep Hunting"**; "Zum Ort" → **"To Location"**; "Inventar öffnen" → **"Open Inventory"**.
 - Log panel: "Kampfprotokoll"/"Kampflog" → **"Combat Log"**.