feedback5 WE2: larger-range triggers the data cannot carry — 谬因 S2's beam path, 薇薇安娜 S3's 3-2 from its second cast (#16)

The owner's ACTIVE_RANGE rule (a MANUAL skill whose running range strictly contains the
operator's own) for two skills whose running range is no data range (O1, O11 reports):
op-aphris.js adds the beam's path as a content trigger range; op-vvana.js switches S3 to
ACTIVE_RANGE on 3-2 once its first cast of a deployment ended (DEFAULT again on redeploy)
through a new additive SkillRuntime.setTrigger(rule, grid). The scan of the wave 2-3
reports and the 41 candidate skills is in the doc draft (others: target-centred, already
fixed, or owner questions). Golden: diy-045 (谬因 S2 fires for enemies beyond her 6 tiles)
and diy-078 (薇薇安娜 S3: skill timing in hooks / snapshots only) moved.

server/sim/skills.js

@@ -120,6 +120,19 @@ export class SkillRuntime {
     this.noSkill = !spec;         // unit without any skill spec
   }
 
+  /**
+   * Change the trigger rule and grid mid-battle — a kit whose skill's running range changes with its own use (薇薇安娜 S3:
+   * "首次技能结束后，本技能的技能范围永久扩大至3-2" — ACTIVE_RANGE on 3-2 from then, DEFAULT again at her next deployment).
+   * `grid`: a facing-RIGHT [dRow, dCol] grid (ACTIVE_RANGE / SKILL_RANGE / CUSTOM_RANGE), or null. (0.2.0 WE2, additive.)
+   * @param {string} rule @param {number[][]|null} [grid]
+   */
+  setTrigger(rule, grid = null) {
+    this.rule = String(rule ?? 'DEFAULT').toUpperCase();
+    this.triggerGrid = Array.isArray(grid) && grid.length ? grid : null;
+    this._trigKeys = null;
+    this._trigSet = null;
+  }
+
   /**
    * Extra DEFAULT-trigger range (海嗣 "攻击范围视为自身攻击范围的延伸", 流形): `fn(battle, unit)` returns a list whose
    * entries are ally units (their current `rangeKeys` count while they are on the field) or arrays of absolute tile