refactor: move No LoRA feature from LoRA Pool to Lora Cycler widget

Move the 'empty/no LoRA' cycling functionality from the LoRA Pool node
to the Lora Cycler widget for cleaner architecture:

Frontend changes:
- Add include_no_lora field to CyclerConfig interface
- Add includeNoLora state and logic to useLoraCyclerState composable
- Add toggle UI in LoraCyclerSettingsView with special styling
- Show 'No LoRA' entry in LoraListModal when enabled
- Update LoraCyclerWidget to integrate new logic

Backend changes:
- lora_cycler.py reads include_no_lora from config
- Calculate effective_total_count (actual count + 1 when enabled)
- Return empty lora_stack when on No LoRA position
- Return actual LoRA count in total_count (not effective count)

Reverted files to pre-PR state:
- lora_loader.py, lora_pool.py, lora_randomizer.py, lora_stacker.py
- lora_routes.py, lora_service.py
- LoraPoolWidget.vue and related files

Related to PR #861

Co-authored-by: dogatech <dogatech@dogatech.home>

vue-widgets/src/composables/useLoraPoolApi.ts

@@ -62,7 +62,6 @@ export function useLoraPoolApi() {
     foldersExclude?: string[]
     noCreditRequired?: boolean
     allowSelling?: boolean
-    includeEmptyLora?: boolean
     page?: number
     pageSize?: number
   }
@@ -93,10 +92,6 @@ export function useLoraPoolApi() {
         urlParams.set('allow_selling_generated_content', String(params.allowSelling))
       }
 
-      if (params.includeEmptyLora !== undefined) {
-        urlParams.set('include_empty_lora', String(params.includeEmptyLora))
-      }
-
       const response = await fetch(`/api/lm/loras/list?${urlParams}`)
       const data = await response.json()