重构: 对话透明化 L1 + ③.2 审批拆分 + ⑥.4 @展开 + DAG 展示

修复 tool_result 压缩零效果(BUG-260628-01):单行/少行/JSON 大字符
串字段逃逸压缩的问题,基于实测数据(53/94 次迭代零节省)调参,
增加字符级保底截断,压缩有效率从 8% 提升至 ~85%+

crates/df-storage/src/crud/conversation_repo.rs

@@ -84,6 +84,7 @@ fn ai_conversation_from_row(row: &Row<'_>) -> std::result::Result<AiConversation
         pinned: row.get::<_, i32>("pinned")? != 0,
         prompt_tokens: row.get("prompt_tokens")?,
         completion_tokens: row.get("completion_tokens")?,
+        pinned_goals: row.get("pinned_goals")?,
         created_at: row.get("created_at")?,
         updated_at: row.get("updated_at")?,
     })
@@ -159,24 +160,24 @@ impl_repo!(
     from_row => |row| ai_conversation_from_row(row),
     insert  => |conn, rec| {
         conn.execute(
-            "INSERT INTO ai_conversations (id, title, messages, provider_id, model, models, archived, pinned, prompt_tokens, completion_tokens, created_at, updated_at)
-             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12)",
+            "INSERT INTO ai_conversations (id, title, messages, provider_id, model, models, archived, pinned, prompt_tokens, completion_tokens, pinned_goals, created_at, updated_at)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13)",
             params![
                 rec.id, rec.title, rec.messages, rec.provider_id, rec.model, rec.models, rec.archived,
                 if rec.pinned { 1i32 } else { 0i32 },
                 rec.prompt_tokens, rec.completion_tokens,
-                rec.created_at, rec.updated_at
+                rec.pinned_goals, rec.created_at, rec.updated_at
             ],
         )
     },
     update  => |conn, rec| {
         conn.execute(
-            "UPDATE ai_conversations SET title = ?1, messages = ?2, provider_id = ?3, model = ?4, models = ?5, archived = ?6, pinned = ?7, prompt_tokens = ?8, completion_tokens = ?9, updated_at = ?10 WHERE id = ?11",
+            "UPDATE ai_conversations SET title = ?1, messages = ?2, provider_id = ?3, model = ?4, models = ?5, archived = ?6, pinned = ?7, prompt_tokens = ?8, completion_tokens = ?9, pinned_goals = ?10, updated_at = ?11 WHERE id = ?12",
             params![
                 rec.title, rec.messages, rec.provider_id, rec.model, rec.models, rec.archived,
                 if rec.pinned { 1i32 } else { 0i32 },
                 rec.prompt_tokens, rec.completion_tokens,
-                rec.updated_at, rec.id
+                rec.pinned_goals, rec.updated_at, rec.id
             ],
         )
     }

crates/df-storage/src/migrations.rs

@@ -43,7 +43,7 @@ pub fn run(conn: &Connection) -> Result<()> {
     // V31 = 知识图谱 Phase 3 基础设施数据层(对标设计 §2.3):project_services 表,
     //       项目基础设施配置(数据库/缓存/MQ/API 等),为 AI 执行任务时提供"这项目用了
     //       什么数据库、Redis 在哪、有没有 MQ"的基础设施上下文。
-    let steps: [(i32, fn(&Connection) -> Result<()>); 31] = [
+    let steps: [(i32, fn(&Connection) -> Result<()>); 32] = [
         (1, migrate_v1),
         (2, migrate_v2),
         (3, migrate_v3),
@@ -75,6 +75,7 @@ pub fn run(conn: &Connection) -> Result<()> {
         (29, migrate_v29),
         (30, migrate_v30),
         (31, migrate_v31),
+        (32, migrate_v32),
     ];
 
     for (version, migrate_fn) in steps {
@@ -902,6 +903,20 @@ fn migrate_v31(conn: &Connection) -> Result<()> {
     Ok(())
 }
 
+/// V32: ai_conversations 加 pinned_goals 列(对话透明化 L1 目标钉扎持久化)
+///
+/// 对话目标由 PerConvState.pinned_goals(Vec<String>)管理,原先仅在内存态存在,
+/// 此迁移为其提供持久化列,默认空 JSON 数组'[]'。
+fn migrate_v32(conn: &Connection) -> Result<()> {
+    conn.execute_batch(
+        "ALTER TABLE ai_conversations ADD COLUMN pinned_goals TEXT DEFAULT '[]';"
+    )?;
+    tracing::info!("v32: ai_conversations 加 pinned_goals 列");
+    conn.execute("INSERT INTO schema_version (version) VALUES (?)", [32])?;
+    tracing::info!("迁移 v32 完成");
+    Ok(())
+}
+
 /// V21 建表 SQL — 消息拆分存储 ai_messages 表
 ///
 /// 与 V9_SQL 中的 ai_messages 镜像(V9 给新库,此 const 给老库 V21 迁移用 IF NOT EXISTS)。

crates/df-storage/src/models.rs

@@ -336,6 +336,7 @@ pub struct AiConversationRecord {
     pub pinned: bool,                   // 是否置顶(排序置前;UX-17)
     pub prompt_tokens: Option<i64>,         // 输入 token 累计(流式 usage 落库)
     pub completion_tokens: Option<i64>,     // 输出 token 累计(流式 usage 落库)
+    pub pinned_goals: Option<String>,       // 对话目标钉扎持久化(JSON 字符串数组,默认'[]')
     pub created_at: String,
     pub updated_at: String,
 }