Fix timeline scene count: treat segments[0] as anchor, not a scene

Mirrors _v2_transition_scene_texts: the text before the first
transition is a character anchor prepended to every scene, not a scene
itself. Show it separately above the rail. scenes[] now matches what
the Scene Chain sampler actually generates.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

conditioning.py

@@ -573,20 +573,27 @@ def split_prompt_by_transitions(prompt, placement="start"):
 
 
 def parse_timeline_segments(prompt):
-    """Return {"scenes": [...], "transitions": [...]} for timeline preview.
+    """Return {"anchor": str, "scenes": [...], "transitions": [...]} for timeline preview.
 
-    Uses split_prompt_by_transitions — the same code path as Studio generation.
-    scenes: list of {"index": int, "text": str}
-    transitions: list of {"after_scene": int, "visual_effect": str|None}
+    Mirrors _v2_transition_scene_texts: segments[0] is the character anchor prepended
+    to every scene, segments[1:] are the actual generated scenes.
+    If no transitions found, the single segment is treated as scene 1 with no anchor.
     """
     segments = split_prompt_by_transitions(prompt, placement="silent")
-    scenes = [{"index": i, "text": text} for i, (text, _) in enumerate(segments)]
+    if len(segments) == 1:
+        return {
+            "anchor": "",
+            "scenes": [{"index": 0, "text": segments[0][0]}],
+            "transitions": [],
+        }
+    anchor = segments[0][0].strip()
+    scenes = [{"index": i, "text": text.strip()} for i, (text, _) in enumerate(segments[1:])]
     transitions = [
         {"after_scene": i - 1, "visual_effect": effect}
-        for i, (_, effect) in enumerate(segments)
+        for i, (_, effect) in enumerate(segments[1:])
         if i > 0
     ]
-    return {"scenes": scenes, "transitions": transitions}
+    return {"anchor": anchor, "scenes": scenes, "transitions": transitions}
 
 
 class FunPackVideoRefiner:

web/funpack_studio.js

@@ -1283,13 +1283,20 @@ function openPanel(node) {
     refreshBtn.addEventListener("click", () => { body.replaceChildren(); renderTimeline(); });
     body.append(refreshBtn);
 
-    const { scenes, transitions } = data;
+    const { anchor, scenes, transitions } = data;
     const trByScene = {};
     for (const t of transitions) trByScene[t.after_scene] = t;
 
     body.append(el("div", "funpack-studio-hint",
       scenes.length === 1 ? "1 scene — no transitions found." : `${scenes.length} scenes detected.`));
 
+    if (anchor) {
+      const anchorBox = el("div", "funpack-timeline-anchor");
+      anchorBox.append(el("div", "funpack-timeline-badge", "Anchor (all scenes)"));
+      anchorBox.append(el("div", "funpack-timeline-text", anchor));
+      body.append(anchorBox);
+    }
+
     const rail = el("div", "funpack-timeline-rail");
     for (const scene of scenes) {
       const box = el("div", "funpack-timeline-box");
@@ -1553,6 +1560,10 @@ function injectStyles() {
     }
     .funpack-studio-tab-link { color: #58a6d6; text-decoration: underline; cursor: pointer; }
     .funpack-studio-tab-link:hover { color: #8dcff5; }
+    .funpack-timeline-anchor {
+      border: 1px solid rgba(88,166,214,0.35); border-radius: 6px;
+      background: rgba(22,45,62,0.5); padding: 8px; margin-bottom: 6px;
+    }
     .funpack-timeline-rail {
       display: flex; flex-direction: row; align-items: flex-start;
       gap: 0; overflow-x: auto; padding-bottom: 6px;