feedback5 WE1: 链愈师 heal jumps within the 3×3 around the last one healed (x-4), a full-HP ally included (follow-up 27)

PRTS 分支特性信息 链愈师: "跳跃范围为x-4…不会对已跳跃过的单位重复跳跃", "优先跳跃至范围内生命比例最低＞部署时间点最晚的我方单位。
可选择满生命我方单位为跳跃目标，但仍受禁疗制约" (range_table x-4 = the 3×3 around the unit).

- ai.js chainHealNext: an ally on the 3×3 of tiles around the last one healed, not yet in the chain, no device / hidden /
  孤立 / 禁疗 unit (the healer's healThrough summon excepted), the lowest HP ratio first — a full-HP ally too, the chain
  goes on from it — then the latest deployed. doHeal (莎草) and Mon3tr's chainFrom both use it (her fullProsts case is
  now general and gone). It used to be the most injured ally within 2.5 tiles. [ASSUMED] 禁疗 = not selected.

Golden: roster-004, roster-005, roster-023, roster-024, bond-sargonShip-low (莎草's chains: other jump targets, full-HP
links); diy-133, diy-134 (Mon3tr). Others unchanged (no match fields a chain healer).

Tests: test/sim/feedback5-chain-heal.test.js (new, 3); op_monstr, kits_t1t2, feedback2-surtr-stealth pass.
Docs: SIM.md §Professions (chainhealer row).

test/golden/bonds.json

@@ -1065,23 +1065,23 @@
       "rngDraws": 2,
       "errors": {"count":0,"kinds":[]},
       "players": {
-        "p1": {"killed":15,"total":17,"perfect":false,"leaks":2,"leaksUncounted":0,"coins":0,"dmg":70415,"bossDmg":0,"heal":16499,"deaths":0,"layerGains":{"sargonShip":5}}
+        "p1": {"killed":15,"total":17,"perfect":false,"leaks":2,"leaksUncounted":0,"coins":0,"dmg":70415,"bossDmg":0,"heal":16347,"deaths":0,"layerGains":{"sargonShip":5}}
       },
       "units": [
-        ["p1",1,"op","chess_char_2_08_a",1,null,2300.11,1,2,2,2745,6042,2156,34,1],
-        ["p1",2,"op","chess_char_1_12_a",1,null,1840,1,1,0,0,0,63,0,0],
-        ["p1",3,"op","chess_char_4_22_a",2,null,2022,1,3,3,30743,1182,694,23,1],
-        ["p1",4,"op","chess_char_2_06_a",0,null,1440,1,4,0,0,916,6860,31,15],
-        ["p1",5,"op","chess_char_4_21_a",1,null,1271,1,7,0,0,2019,3276,40,1],
-        ["p1",6,"op","chess_char_4_25_a",2,null,1221,1,5,0,0,2137,698,0,1],
-        ["p1",7,"op","chess_char_4_26_a",0,null,1368,1,8,0,0,3145,2223,13,0],
-        ["p1",8,"op","chess_char_3_01_a",2,null,1471.8,1,6,10,36927,1389,530,51,1]
+        ["p1",1,"op","chess_char_2_08_a",1,null,2300.11,1,2,2,2745,6110,2375,34,1],
+        ["p1",2,"op","chess_char_1_12_a",1,null,1840,1,1,0,0,0,111,0,0],
+        ["p1",3,"op","chess_char_4_22_a",2,null,2022,1,3,3,30743,1232,716,23,1],
+        ["p1",4,"op","chess_char_2_06_a",0,null,1440,1,4,0,0,797,6475,32,15],
+        ["p1",5,"op","chess_char_4_21_a",1,null,1271,1,7,0,0,1951,3665,43,1],
+        ["p1",6,"op","chess_char_4_25_a",2,null,1221,1,5,0,0,2053,696,0,1],
+        ["p1",7,"op","chess_char_4_26_a",0,null,1368,1,8,0,0,3044,1697,15,0],
+        ["p1",8,"op","chess_char_3_01_a",2,null,1471.8,1,6,10,36927,1490,613,51,1]
       ],
-      "enemies": {"enemy_1267_nhpbr":[11,10,0,4553,43172],"enemy_1267_nhpbr_2":[5,5,0,1783,24750],"enemy_1272_nhtank":[1,0,0,10494,2493]},
-      "hooks": [1,25,3300,234,234,523,523,2355,15,15,20,20,0,14437,0,5,17,0,1,15,1,0,0],
-      "events": {"atk":316,"deploy":8,"die":15,"dmg":483,"engage":3,"fx":112,"heal":156,"layer":1,"skill":40,"spawn":25,"status":235},
+      "enemies": {"enemy_1267_nhpbr":[11,10,0,4678,43172],"enemy_1267_nhpbr_2":[5,5,0,1676,24750],"enemy_1272_nhtank":[1,0,0,10323,2493]},
+      "hooks": [1,25,3300,240,240,523,523,2589,15,15,20,20,0,14437,0,5,17,0,1,15,1,0,0],
+      "events": {"atk":332,"deploy":8,"die":15,"dmg":481,"engage":3,"fx":112,"heal":155,"layer":1,"skill":40,"spawn":25,"status":247},
       "fx": {"buff":1,"counter":15,"garrison":1,"healField":1,"mote":38,"redistribute":15,"reweave":1,"slash":17,"spGift":1,"truesilver":1,"zone":21},
-      "snaps": "0bdd9351 b24b323e bd7fa0e6 4703d650 28cb05fc cf42c370 8691643e b07ee7e3 98f5edc6 aed38d5e c73b513b"
+      "snaps": "0bdd9351 b24b323e ab95517a c55fba39 176cd8a6 f77ba7e2 c1b9c3f4 2b4fa92b 246b1e91 0f8ceadd 18c1b994"
     },
     "bond-sargonShip-high": {
       "about": "萨尔贡 high: tier 2 layers 999; chess_char_1_12_b chess_char_2_08_b chess_char_3_06_b chess_char_4_23_b chess_char_4_22_b chess_char_2_06_b chess_char_3_13_b chess_char_4_25_b",