New Vehicle "8,8 cm Flak 18 Sfl" , Hull upgrade remake and More!

Hey Commanders! Here comes the 0.9.86.8b update!
A new vehicle, a rework of the hull upgrade system, and a bunch of mechanic changes. Let's take a look!

🚀 New Vehicle Arrives!

• "8,8 cm Flak 18 Sfl"
  This vehicle’s turret comes with the passive skill "Kill Marks":
  This weapon gains bonuses when it scores kills. Each bonus can stack up to 4 times. ○ Every 10 vehicle kills: Reload Time -0.5 ○ Every 5 field gun kills: Damage +1 ○ Every 5 bunker kills: Penetration +1

🔧 Hull Upgrade System Rework

• Hull upgrades are now divided into White / Green / Blue / Purple / Orange rarities. Higher-tier upgrades are more likely to appear later in a run.

• Higher-tier upgrades are more "aggressive": stronger bonuses, but also more noticeable drawbacks.

• A new batch of high-tier hull upgrades has been added. As for what they are... go explore them yourself~~

⚡ Speed and Mobility Adjustments

• The previously vague "Mobility" stat has been unified into a more intuitive "Max Speed".
  Increasing Max Speed will also improve engine power.

• "Transmission Upgrade" -> Max Speed +5

• "Engine Upgrade" -> Max Speed +10, Rear Armor -2

• Sunday's skill adjustments: ○ "Victory Rush" -> When you destroy an enemy, Max Speed +10 for 3 seconds, up to 3 times. ○ "Eager" -> When battle starts, Max Speed +20 for 15 seconds.

🎯 Critical Hit and Stabilizer Updates

• New stat: "Critical Growth Speed Limit"
  Critical will continue to grow normally while moving within this speed limit (default 10 km/h).

• "Stabilizer" -> Critical Growth Speed Limit +30

• "Suspension Upgrade" -> ○ Critical Growth Speed Limit +20 ○ Vehicle Stability +30%

⚙️ Other Improvements

• After two years of hard work, the player commander... yes, you... has finally moved into a new office.

• Reworked tank firing and hit effects.

• Roadmap UI will now display the vehicle's armor and turret information.

• Removed the slider next to character illustrations. You can now drag them directly.

• Reward types are now non-repeating when selecting missions.

• Fixed an issue where crew skills did not affect auto turret range and reload speed.
  Buff values are now also displayed on the turret card.

💡 This is a Beta update. Please participate in testing by right-clicking on the game in Steam, selecting "Properties" → "Betas" → "Beta Participation". Once everything is stable, it will be released to the default branch.