Fix xxxtik empty results; replay solved identity on raw requests

Raw requester calls did not adopt the remembered FlareSolverr user agent,
so a RedGifs token minted under it was rejected on every gif lookup.
Tag/creator pages that mix non-RedGifs sources are refilled from later
cursor batches instead of coming back empty.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MUYdCh2nCVsQYgJAT7gwSi

src/providers/xxxtik.rs

@@ -30,6 +30,7 @@ const RESOLVE_CONCURRENCY: usize = 8;
 // xxxtik's listing endpoints are cursor-based (the numeric `id` of the last item
 // returned), not page-number based, so reaching page N requires walking N
 // sequential requests from the start of the feed.
+const MAX_REFILL_FETCHES: usize = 4;
 const MAX_PAGE_WALK: u16 = 25;
 
 // xxxtik exposes ~60k tags through /tag/options, far too many to background-load
@@ -423,18 +424,43 @@ impl XxxtikProvider {
         let mut items = Vec::new();
 
         for _ in 0..page {
-            let batch = self.fetch_one_page(path, cursor, per_page, options).await?;
-            if batch.is_empty() {
+            // Tag and creator pages mix in posts whose source is not RedGifs
+            // (erome links, empty sources); those cannot be resolved here and
+            // used to leave whole pages empty ("girl" returned nothing). Keep
+            // pulling raw batches, bounded, until a page has enough
+            // resolvable posts.
+            let mut collected: Vec<Post> = Vec::new();
+            let mut exhausted = false;
+            for _ in 0..MAX_REFILL_FETCHES {
+                let batch = self.fetch_one_page(path, cursor, per_page, options).await?;
+                if batch.is_empty() {
+                    exhausted = true;
+                    break;
+                }
+                cursor = batch.last().map(|post| post.id).unwrap_or(cursor);
+                let short_batch = batch.len() < per_page;
+                collected.extend(batch.into_iter().filter(Self::is_redgifs_post));
+                if collected.len() >= per_page || short_batch {
+                    break;
+                }
+            }
+            if exhausted && collected.is_empty() {
                 items = Vec::new();
                 break;
             }
-            cursor = batch.last().map(|post| post.id).unwrap_or(cursor);
-            items = batch;
+            items = collected;
         }
 
         Ok(items)
     }
 
+    fn is_redgifs_post(post: &Post) -> bool {
+        post.source
+            .as_deref()
+            .map(|source| source.contains("redgifs.com/"))
+            .unwrap_or(false)
+    }
+
     async fn fetch_target_posts(
         &self,
         target: &Target,
@@ -791,6 +817,25 @@ impl Provider for XxxtikProvider {
 
 #[cfg(test)]
 mod tests {
+    #[test]
+    fn only_redgifs_sources_are_resolvable() {
+        let mk = |source: Option<&str>| super::Post {
+            id: 1,
+            uuid: "u".to_string(),
+            description: None,
+            source: source.map(str::to_string),
+            status: None,
+            created_at: String::new(),
+            author: Default::default(),
+            tags: vec![],
+        };
+        assert!(XxxtikProvider::is_redgifs_post(&mk(Some("https://www.redgifs.com/watch/abc"))));
+        assert!(XxxtikProvider::is_redgifs_post(&mk(Some("https://redgifs.com/watch/abc"))));
+        assert!(!XxxtikProvider::is_redgifs_post(&mk(Some("https://www.erome.com/a/CE5z46ne#39"))));
+        assert!(!XxxtikProvider::is_redgifs_post(&mk(Some(""))));
+        assert!(!XxxtikProvider::is_redgifs_post(&mk(None)));
+    }
+
     use super::*;
 
     #[test]