What's new

- Reordered Settings Page.
- Added "Click to Unblur" for posts.
- Added Persistent Notification
- Improved Grayscale Scheduling.
and more.

lib/services/navigation_guard.dart

@@ -0,0 +1,68 @@
+/// Determines whether a navigation request should be blocked.
+///
+/// Rules:
+/// - instagram.com/reels  (and /reels/) = BLOCKED — this is the mindless feed tab
+/// - instagram.com/reel/SHORTCODE/       = ALLOWED — a specific reel (e.g. from a DM)
+/// - /explore/ is allowed (explore content is blurred via CSS instead)
+/// - Only instagram.com domains are allowed (blocks external redirects)
+class NavigationGuard {
+  static const _allowedHosts = ['instagram.com', 'www.instagram.com'];
+
+  /// Regex matching the Reels FEED root — NOT individual reels.
+  /// The `(/|\?|$)` suffix ensures query params (e.g. ?fg=blocked) still match.
+  static final _reelsFeedRegex = RegExp(
+    r'instagram\.com/reels(/|\?|$)',
+    caseSensitive: false,
+  );
+
+  /// Regex matching a specific reel (e.g. /reel/ABC123/).
+  static final _specificReelRegex = RegExp(
+    r'instagram\.com/reel/[^/?#]+',
+    caseSensitive: false,
+  );
+
+  /// Returns a [BlockDecision] for the given [url].
+  static BlockDecision evaluate({required String url}) {
+    Uri uri;
+    try {
+      uri = Uri.parse(url);
+    } catch (_) {
+      return const BlockDecision(blocked: false, reason: null);
+    }
+
+    // Allow non-HTTP schemes (about:blank, data:, etc.)
+    if (!uri.scheme.startsWith('http')) {
+      return const BlockDecision(blocked: false, reason: null);
+    }
+
+    // Block non-Instagram domains (prevents phishing/external redirects)
+    final host = uri.host.toLowerCase();
+    if (!_allowedHosts.any((h) => host == h)) {
+      return BlockDecision(
+        blocked: true,
+        reason: 'External domain blocked: $host',
+      );
+    }
+
+    // Block ONLY the Reels feed tab root (/reels, /reels/)
+    // but allow specific reels (/reel/SHORTCODE/) opened from DMs
+    if (_reelsFeedRegex.hasMatch(url)) {
+      return const BlockDecision(
+        blocked: true,
+        reason:
+            'Reels feed is disabled — open a specific reel from DMs instead',
+      );
+    }
+
+    return const BlockDecision(blocked: false, reason: null);
+  }
+
+  /// True if the URL is a specific individual reel (from a DM share).
+  static bool isSpecificReel(String url) => _specificReelRegex.hasMatch(url);
+}
+
+class BlockDecision {
+  final bool blocked;
+  final String? reason;
+  const BlockDecision({required this.blocked, required this.reason});
+}