Feature/v2/selected pageeditor rework (#4756)

# Description of Changes

<!--
Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: James Brunton <[email protected]>
Co-authored-by: Copilot <[email protected]>

frontend/src/core/components/AppProviders.tsx

@@ -15,6 +15,7 @@ import { SignatureProvider } from "@app/contexts/SignatureContext";
 import { OnboardingProvider } from "@app/contexts/OnboardingContext";
 import { TourOrchestrationProvider } from "@app/contexts/TourOrchestrationContext";
 import { AdminTourOrchestrationProvider } from "@app/contexts/AdminTourOrchestrationContext";
+import { PageEditorProvider } from "@app/contexts/PageEditorContext";
 import ErrorBoundary from "@app/components/shared/ErrorBoundary";
 import { useScarfTracking } from "@app/hooks/useScarfTracking";
 import { useAppInitialization } from "@app/hooks/useAppInitialization";
@@ -64,15 +65,17 @@ export function AppProviders({ children, appConfigRetryOptions, appConfigProvide
                         <HotkeyProvider>
                           <SidebarProvider>
                             <ViewerProvider>
-                              <SignatureProvider>
-                                <RightRailProvider>
-                                  <TourOrchestrationProvider>
-                                    <AdminTourOrchestrationProvider>
-                                      {children}
-                                    </AdminTourOrchestrationProvider>
-                                  </TourOrchestrationProvider>
-                                </RightRailProvider>
-                              </SignatureProvider>
+                              <PageEditorProvider>
+                                <SignatureProvider>
+                                  <RightRailProvider>
+                                    <TourOrchestrationProvider>
+                                      <AdminTourOrchestrationProvider>
+                                        {children}
+                                      </AdminTourOrchestrationProvider>
+                                    </TourOrchestrationProvider>
+                                  </RightRailProvider>
+                                </SignatureProvider>
+                              </PageEditorProvider>
                             </ViewerProvider>
                           </SidebarProvider>
                         </HotkeyProvider>