Add Gongan collapse chapter

docs/roadmap.md

@@ -66,16 +66,17 @@ Build a small complete tactical RPG loop that can grow into a longer Romance of
 - Fortieth battle Han River flood route, using Guan Yu's water-control plan across an 80x62 flooded battlefield to break Yu Jin's seven armies and open the Fan Castle siege setup
 - Forty-first battle Fan Castle siege route, using a twenty-two-officer roster across an 82x64 castle battlefield to pressure Cao Ren's gate line, Pang De's desperate cavalry, and Wu's rear-shadow scouts
 - Forty-second battle Jing rear-crisis route, using Ma Liang and Mi Zhu's rear-guard roles across an 84x66 Jiangling ferry battlefield to repel Lu Meng's disguised scouts and expose Mi Fang's wavering rear line
+- Forty-third battle Gongan gate-collapse route, using a twenty-two-officer roster across an 86x68 Gongan gate battlefield to delay Lu Meng's main infiltration, Fu Shiren's wavering guard, and Mi Fang's silent ledger crisis
 - Camp progress timeline tab that summarizes Liu Bei's long campaign arc, completed battles, current chapter, latest battle, and next major chapter
 - Tactical sortie preparation panel with battle-specific sortie limits, recommended officers with reasons, class role, named equipment, core stats, bond partner, next-map terrain suitability, deployment preview, formation roles, active bond count, recruited-officer count, reserve roster summary, and readiness advice for each deployable officer
 - Officer collection support in camp, including full roster status, selected/reserve/recommended markers, selectable reserve drill focus, and post-battle reserve training growth for benched officers
 - Treasure equipment effects wired into battle previews and resolution, including named weapon damage bonuses, defensive treasure mitigation, support recovery bonuses, turn-start charm recovery, and equipment-specific growth bonuses
-- Flow verification script from title through the forty-second battle victory, King of Hanzhong council milestone, Shu-Han foundation milestone, recruit sortie selection, Liu Biao visit rewards, Zhuge Liang recruitment, Bowang/Changban/Jiangdong/Red Cliffs/Jing Province/Guiyang/Wuling/Changsha/Yi Province/Fu Pass/Luo Castle/Luofeng/Luo main gate/Mianzhu/Chengdu/Jiameng/Yangping/Dingjun/Hanzhong/Jing defense/Fan Castle/Han River/Fan siege/Jing rear camp states, campaign timeline state, and camp save state
+- Flow verification script from title through the forty-third battle victory, King of Hanzhong council milestone, Shu-Han foundation milestone, recruit sortie selection, Liu Biao visit rewards, Zhuge Liang recruitment, Bowang/Changban/Jiangdong/Red Cliffs/Jing Province/Guiyang/Wuling/Changsha/Yi Province/Fu Pass/Luo Castle/Luofeng/Luo main gate/Mianzhu/Chengdu/Jiameng/Yangping/Dingjun/Hanzhong/Jing defense/Fan Castle/Han River/Fan siege/Jing rear/Gongan collapse camp states, campaign timeline state, and camp save state
 
 ## Next Steps
 
-1. Build the Jing Province rear-collapse follow-up, using Lu Meng's infiltration, Mi Fang/Fu Shiren's wavering, and Guan Yu's overextended Fan Castle front as the next campaign tension
-2. Expand Jing rear-crisis aftermath events, including warehouse trust, river rumor choices, officer loyalty checks, and supply decisions that affect sortie recommendations
+1. Build the Maicheng isolation follow-up, using Guan Yu's overextended Fan Castle front, Wu's sealed rear roads, and Wei's counterpressure as the next campaign tension
+2. Expand Gongan collapse aftermath events, including officer loyalty checks, sealed gate choices, and supply decisions that affect sortie recommendations
 3. Expand reserve planning into individual officer assignments, including targeted class practice, paired bond training, and camp task slots
 4. Add a dedicated treasure/equipment management view so players can compare special effects and growth
 5. Keep expanding scenarios through the long campaign instead of treating the current slice as an ending