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/fixtures/components/SidebarTab.ts

@@ -154,7 +154,7 @@ export class WorkflowsSidebarTab extends SidebarTab {
 
     // Wait for workflow service to finish renaming
     await this.page.waitForFunction(
-      () => !window.app?.extensionManager?.workflow?.isBusy,
+      () => !(window.app?.extensionManager as any)?.workflow?.isBusy,
       undefined,
       { timeout: 3000 }
     )

browser_tests/fixtures/components/Topbar.ts

@@ -85,7 +85,7 @@ export class Topbar {
 
     // Wait for workflow service to finish saving
     await this.page.waitForFunction(
-      () => !window.app!.extensionManager.workflow.isBusy,
+      () => !(window.app!.extensionManager as any).workflow.isBusy,
       undefined,
       { timeout: 3000 }
     )