fix: browser_tests Phase 3 - type annotations and final fixes

- Add 'this: ExpectMatcherState' to ComfyPage.ts makeMatcher function
- Add type annotations to parameters (slot, comfyPage, w, inputs)
- Add 'as any' for ExtensionManager dynamic properties (workflow, focusMode, colorPalette, queueSettings)
- Fix keybindings import paths to use '/types' suffix
- Cast Subgraph types and CanvasPointerEvent in SubgraphHelper
- Fix test setting IDs with 'as any' in useSettingSearch, extensionAPI specs
- Fix AppReadiness, colorPalette, featureFlags type issues
- Replace removed ComfyPage properties with DefaultGraphPositions
- Remove unused _canvas parameter from ClipboardHelper
- Add non-null assertions for app, vaeInput, convertedInput

Reduces browser_tests typecheck errors from 72 to 0.

Amp-Thread-ID: https://ampcode.com/threads/T-019c17a3-2482-7115-8e42-ba0bbb0c9cda
Co-authored-by: Amp <amp@ampcode.com>

browser_tests/tests/vueNodes/interactions/links/linkInteraction.spec.ts

@@ -451,7 +451,7 @@ test.describe('Vue Node Link Interaction', { tag: '@screenshot' }, () => {
         if (!link) throw new Error('Link not found')
 
         // Convert the client/canvas pixel coordinates to graph space
-        const pos = app.canvas.ds.convertCanvasToOffset([
+        const pos = app!.canvas.ds.convertCanvasToOffset([
           clientPoint.x,
           clientPoint.y
         ])
@@ -539,7 +539,7 @@ test.describe('Vue Node Link Interaction', { tag: '@screenshot' }, () => {
         if (!link) throw new Error('Link not found')
 
         // Convert the client/canvas pixel coordinates to graph space
-        const pos = app.canvas.ds.convertCanvasToOffset([
+        const pos = app!.canvas.ds.convertCanvasToOffset([
           clientPoint.x,
           clientPoint.y
         ])