fix: reset big fish initial creation progress

server-rs/crates/spacetime-module/src/big_fish/session.rs

@@ -1,6 +1,8 @@
 use crate::big_fish::tables::{big_fish_agent_message, big_fish_creation_session};
 use crate::*;
 
+const INITIAL_BIG_FISH_CREATION_PROGRESS_PERCENT: u32 = 0;
+
 #[spacetimedb::procedure]
 pub fn create_big_fish_session(
     ctx: &mut ProcedureContext,
@@ -182,7 +184,8 @@ pub(crate) fn create_big_fish_session_tx(
             owner_user_id: input.owner_user_id.clone(),
             seed_text: input.seed_text.trim().to_string(),
             current_turn: 0,
-            progress_percent: 20,
+            // 中文注释：欢迎语和初始锚点只建立工作台上下文，不能提前抬高创作进度。
+            progress_percent: INITIAL_BIG_FISH_CREATION_PROGRESS_PERCENT,
             stage: BigFishCreationStage::CollectingAnchors,
             anchor_pack_json: serialize_anchor_pack(&anchor_pack)
                 .map_err(|error| error.to_string())?,
@@ -707,6 +710,11 @@ mod tests {
         }
     }
 
+    #[test]
+    fn initial_big_fish_creation_progress_starts_from_zero() {
+        assert_eq!(INITIAL_BIG_FISH_CREATION_PROGRESS_PERCENT, 0);
+    }
+
     #[test]
     fn big_fish_direct_work_content_ignores_empty_created_session() {
         let empty_session =