Fix: Set both end km and traveled km in journey forms

Problem: Website was recalculating traveled km based on previous row's
end km, causing chain reaction of incorrect values (only 52% match rate).

Solution: Explicitly set f_cil_km (end km) in addition to f_ujeto
(traveled km) to prevent website from auto-calculating incorrect values.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/fillers/journeybook_filler.py

@@ -242,8 +242,11 @@ class JourneybookFiller:
                             logger.info(f"Filling refuel 2 km: f_km={refuel_2_km}")
         else:
             # Journey form - fill with data from DataFrame
-            # ONLY update f_ujeto (distance traveled)
-            # Let kj.colsys.cz calculate f_cil_km (end km) automatically
+            # Set BOTH f_cil_km (end km) and f_ujeto (distance traveled)
+            if "Koncový stav" in row_data and pd.notna(row_data["Koncový stav"]):
+                if "f_cil_km" in update["data"]:
+                    update["data"]["f_cil_km"] = str(int(row_data["Koncový stav"]))
+
             if "Ujeto [km]" in row_data and pd.notna(row_data["Ujeto [km]"]):
                 if "f_ujeto" in update["data"]:
                     update["data"]["f_ujeto"] = str(int(row_data["Ujeto [km]"]))