fix: improve combat-happy-path e2e test reliability and speed

- Add data-testid attributes to debug tab buttons (Fill Mana, +10K, +1K, discipline rows)
- Add runTicks(n) to debugBridge for fast-forwarding game ticks in E2E tests
- Fix Step 2: use data-testid selectors instead of fragile DOM traversal for discipline buttons
- Fix Step 4: replace 120s waitForTimeout with runTicks(6000) for deterministic combat
- Fix Step 5: replace 60s waitForTimeout with runTicks(3000)
- Fix Step 6: verify floor decrements after each Climb Down click using waitForFunction
- Fix Step 7: verify Exit Spire button visibility is gated on floor 1
- Remove leftover debug logging (btnInfo DOM inspection)

src/lib/game/stores/debugBridge.ts

@@ -22,5 +22,17 @@ if (typeof window !== 'undefined') {
     usePrestigeStore,
     useDisciplineStore,
     useUIStore,
+    /**
+     * Run n game ticks synchronously.
+     * Each tick advances the game by HOURS_PER_TICK hours.
+     * 50 ticks ≈ 1 in-game hour, 1200 ticks ≈ 1 in-game day.
+     * Use this in E2E tests instead of waitForTimeout to speed up time-dependent assertions.
+     */
+    runTicks: (n: number) => {
+      const store = useGameStore.getState();
+      for (let i = 0; i < n; i++) {
+        store.tick();
+      }
+    },
   };
 }