Even further app fixes (#9617)

- Allow dragging zoom pane with middle click
- Prevent selection of canvasOnly widgets
- These widgets would not display in app mode, so allow selection would
only cause confusion.
- Support displaying the error dialogue in app mode
- Add a somewhat involved mobile app mode error indication system
<img width="300" alt="image"
src="https://github.com/user-attachments/assets/d8793bbd-fff5-4b2a-a316-6ff154bae2c4"
/> <img width="300" alt="image"
src="https://github.com/user-attachments/assets/cb88b0f6-f7e5-409e-ae43-f1348f946b19"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9617-Even-further-app-fixes-31d6d73d365081c891dfdfe3477cfd61)
by [Unito](https://www.unito.io)

src/components/error/ErrorOverlay.vue

@@ -50,7 +50,9 @@
             {{ t('g.dismiss') }}
           </Button>
           <Button variant="secondary" size="lg" @click="seeErrors">
-            {{ t('errorOverlay.seeErrors') }}
+            {{
+              appMode ? t('linearMode.error.goto') : t('errorOverlay.seeErrors')
+            }}
           </Button>
         </div>
       </div>
@@ -69,6 +71,8 @@ import { useRightSidePanelStore } from '@/stores/workspace/rightSidePanelStore'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useErrorGroups } from '@/components/rightSidePanel/errors/useErrorGroups'
 
+defineProps<{ appMode?: boolean }>()
+
 const { t } = useI18n()
 const executionErrorStore = useExecutionErrorStore()
 const rightSidePanelStore = useRightSidePanelStore()
@@ -94,6 +98,7 @@ function dismiss() {
 }
 
 function seeErrors() {
+  canvasStore.linearMode = false
   if (canvasStore.canvas) {
     canvasStore.canvas.deselectAll()
     canvasStore.updateSelectedItems()