linear v2: Simple Mode (#7734)

A major, full rewrite of linear mode, now under the name "Simple Mode". 
- Fixes widget styling
- Adds a new simplified history
- Adds support for non-image outputs
- Supports right sidebar
- Allows and panning on the output image preview
- Provides support for drag and drop zones
- Moves workflow notes into a popover.
- Allows scrolling through outputs with Ctrl+scroll or arrow keys

The primary means of accessing Simple Mode is a toggle button on the
bottom right. This button is only shown if a feature flag is enabled, or
the user has already seen linear mode during the current session. Simple
Mode can also be accessed by
- Using the toggle linear mode keybind
- Loading a workflow that that was saved in Simple Mode workflow
- Loading a template url with appropriate parameter

<img width="1790" height="1387" alt="image"
src="https://github.com/user-attachments/assets/d86a4a41-dfbf-41e7-a6d9-146473005606"
/>

Known issues:
- Outputs on cloud are not filtered to those produced by the current
workflow.
  - Output filtering has been globally disabled for consistency
- Outputs will load more items on scroll, but does not unload
- Performance may be reduced on weak devices with very large histories.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7734-linear-v2-2d16d73d3650819b8a10f150ff12ea22)
by [Unito](https://www.unito.io)

src/stores/imagePreviewStore.ts

@@ -40,7 +40,7 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
   const { nodeIdToNodeLocatorId, nodeToNodeLocatorId } = useWorkflowStore()
   const { executionIdToNodeLocatorId } = useExecutionStore()
   const scheduledRevoke: Record<NodeLocatorId, { stop: () => void }> = {}
-  const latestOutput = ref<string[]>([])
+  const latestPreview = ref<string[]>([])
 
   function scheduleRevoke(locator: NodeLocatorId, cb: () => void) {
     scheduledRevoke[locator]?.stop()
@@ -147,13 +147,6 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
       }
     }
 
-    //TODO:Preview params and deduplication
-    latestOutput.value =
-      (outputs as ExecutedWsMessage['output'])?.images?.map((image) => {
-        const imgUrlPart = new URLSearchParams(image)
-        const rand = app.getRandParam()
-        return api.apiURL(`/view?${imgUrlPart}${rand}`)
-      }) ?? []
     app.nodeOutputs[nodeLocatorId] = outputs
     nodeOutputs.value[nodeLocatorId] = outputs
   }
@@ -221,7 +214,7 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
       scheduledRevoke[nodeLocatorId].stop()
       delete scheduledRevoke[nodeLocatorId]
     }
-    latestOutput.value = previewImages
+    latestPreview.value = previewImages
     app.nodePreviewImages[nodeLocatorId] = previewImages
     nodePreviewImages.value[nodeLocatorId] = previewImages
   }
@@ -391,6 +384,6 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
     // State
     nodeOutputs,
     nodePreviewImages,
-    latestOutput
+    latestPreview
   }
 })