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/tests/composables/useLoraCyclerState.test.ts

@@ -84,7 +84,8 @@ describe('useLoraCyclerState', () => {
         current_lora_filename: '',
         repeat_count: 1,
         repeat_used: 0,
-        is_paused: false
+        is_paused: false,
+        include_no_lora: false
       })
 
       expect(state.currentIndex.value).toBe(5)

vue-widgets/tests/fixtures/mockConfigs.ts

@@ -24,6 +24,7 @@ export function createMockCyclerConfig(overrides: Partial<CyclerConfig> = {}): C
     repeat_count: 1,
     repeat_used: 0,
     is_paused: false,
+    include_no_lora: false,
     ...overrides
   }
 }
@@ -54,7 +55,8 @@ export function createMockPoolConfig(overrides: Partial<LoraPoolConfig> = {}): L
 export function createMockLoraList(count: number = 5): CyclerLoraItem[] {
   return Array.from({ length: count }, (_, i) => ({
     file_name: `lora${i + 1}.safetensors`,
-    model_name: `LoRA Model ${i + 1}`
+    model_name: `LoRA Model ${i + 1}`,
+    file_path: `/models/loras/lora${i + 1}.safetensors`
   }))
 }