refactor: extension

[judekim0507]

Summary by CodeRabbit

Release Notes

• New Features

  • Added Chrome Web Store button to Extensions menu for easier extension discovery and installation
  • Expanded extension capabilities for tabs including reload, URL loading, muting, and zoom control

• Improvements

  • Extensions feature is now fully enabled and no longer experimental
  • Enhanced Extensions settings interface with improved integration

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

This pull request removes the experimental extensions feature gate throughout the codebase, making extensions a standard feature available on macOS 15.5+. It also refactors WebView configuration management, improves extension lifecycle handling, adds new tab and window adapter methods, and introduces logging enhancements.

Changes

Cohort / File(s)	Summary
Feature Gate Removal App/NookCommands.swift, Nook/Components/Sidebar/TopBarView.swift, Nook/Components/Sidebar/URLBarView.swift, Nook/Models/Tab/Tab.swift, Settings/NookSettingsService.swift	Removes experimentalExtensions conditional checks throughout the codebase. Extensions now render based on macOS 15.5 availability and extension manager presence, independent of feature flags. Removes the experimentalExtensions property entirely from NookSettingsService.
Settings UI Refactoring Nook/Components/Settings/SettingsView.swift	Changes ExtensionsSettingsView to require an ExtensionManager parameter via @ObservedObject, removing optional unwrapping and conditional "unavailable" states. Eliminates DISABLED blocks and streamlines extension content rendering.
Extension Handling & Lifecycle Nook/Components/Extensions/ExtensionActionView.swift, Nook/Models/Tab/Tab.swift	Adds OS logging via Logger for extension actions. Refactors action invocation to always resolve tab adapter and call performAction unconditionally. Introduces background content wake flow, extends extension lifecycle notifications (TabActivated), adds extension state diagnostics, and cancellation handling via extensionAwaitCancellable.
Extension Bridge API Expansion Nook/Managers/ExtensionManager/ExtensionBridge.swift	Removes internal timing/state flags (isProcessingTabsRequest, lastActiveTabCall, lastTabsCall). Adds new public methods to ExtensionTabAdapter: reload(fromOrigin:for:completionHandler:), loadURL(_:for:completionHandler:), setMuted(_:for:completionHandler:), setZoomFactor(_:for:completionHandler:), zoomFactor(for:), shouldGrantPermissionsOnUserGesture(for:). Implements identity-based equality and hashing in ExtensionTabAdapter. Adds isPrivate(for:) and windowState(for:) to ExtensionWindowAdapter.
Configuration Management Simplification Nook/Managers/WebViewCoordinator/WebViewCoordinator.swift, Nook/Models/BrowserConfig/BrowserConfig.swift	Reworks WebView configuration to derive from existing webview configuration or shared cached configuration instead of building from scratch. Introduces per-webview fresh WKUserContentController to prevent handler conflicts. Removes legacy preference setups and centralizes configuration inheritance around copying the shared base configuration with per-tab isolation.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~22 minutes

Poem

🐰 Extensions hop free without gates today,
No experimental flags to hold them at bay!
Configuration flows cleaner, lifecycle more bright,
The bridge expands with methods—a web-worthy sight!
Nook's built stronger now, ready to play. 🌟

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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