Import Models module in Views.lua to fix 3.148 Lua errors

[ratchet27]

Summary

• v3.148 introduced models.isValidStackEffect() and started calling it from Views.lua:461 and :466, but Views.lua never imported the Models module. Every redraw of a widget with a stackEffect (or a stageInfo) throws attempt to index a nil value.
• Fix: add local models = addon.load("Models#M") next to the existing settings import. Manifest already loads src/Models.lua before src/Views.lua, so the lookup is safe.

Why this explains the reported symptoms

Reproduces the ESOUI v3.148 bug report:

• "Firekeeper Lua error at Views.lua:461" — stack path (stackCount > 0 and not stackEffectHasStageInfo and models.isValidStackEffect(...)).
• "Incinerate Lua error at Views.lua:466" — stage path (stageInfo and models.isValidStackEffect(...)).
• "Only the last-cast DK skill timer shows, other class timers lost" — the throw aborts Bar.l.onCoreUpdate's for slotNum = 3,8 do loop, so every slot after the offending one (plus the shifted/appended widget cleanup in steps 2-4) never updates on that tick.
• "Firekeeper sticks at red 0.0 until another DK skill is cast" — the "remain <= 0" cleanup block at Views.lua:513-525 runs after the crash point and never executes, and Core.l.refineActions skips removal while stackCount > 0, so the action plus stuck widget remain until a new action overwrites the slot.

ESO throttles repeat Lua errors to one dialog per session, which is why the error "only triggers once, then doesn't come back until /reloadui" even though it fires every 100 ms.

Test plan

• /reloadui with the patch applied; cast Firekeeper - no Lua error; widget counts down and clears normally.
• Cast a skill with stageInfo (e.g. Incinerate) - no Lua error at line 466.
• Multi-skill rotation (arcanist + DK backbar combo): all timers remain visible; no slot dropped after a Firekeeper cast.

Co-Authored-By: Claude Opus 4.7 noreply@anthropic.com