refactor: 统一项目名称从OpenFang到ZCLAW

重构所有代码和文档中的项目名称，将OpenFang统一更新为ZCLAW。包括：
- 配置文件中的项目名称
- 代码注释和文档引用
- 环境变量和路径
- 类型定义和接口名称
- 测试用例和模拟数据

同时优化部分代码结构，移除未使用的模块，并更新相关依赖项。

crates/zclaw-runtime/src/loop_runner.rs

@@ -11,6 +11,7 @@ use crate::tool::{ToolRegistry, ToolContext, SkillExecutor};
 use crate::tool::builtin::PathValidator;
 use crate::loop_guard::LoopGuard;
 use crate::growth::GrowthIntegration;
+use crate::compaction;
 use zclaw_memory::MemoryStore;
 
 /// Agent loop runner
@@ -29,6 +30,8 @@ pub struct AgentLoop {
     path_validator: Option<PathValidator>,
     /// Growth system integration (optional)
     growth: Option<GrowthIntegration>,
+    /// Compaction threshold in tokens (0 = disabled)
+    compaction_threshold: usize,
 }
 
 impl AgentLoop {
@@ -51,6 +54,7 @@ impl AgentLoop {
             skill_executor: None,
             path_validator: None,
             growth: None,
+            compaction_threshold: 0,
         }
     }
 
@@ -101,6 +105,16 @@ impl AgentLoop {
         self.growth = Some(growth);
     }
 
+    /// Set compaction threshold in tokens (0 = disabled)
+    ///
+    /// When the estimated token count of conversation history exceeds this
+    /// threshold, older messages are summarized into a single system message
+    /// and only recent messages are sent to the LLM.
+    pub fn with_compaction_threshold(mut self, threshold: usize) -> Self {
+        self.compaction_threshold = threshold;
+        self
+    }
+
     /// Get growth integration reference
     pub fn growth(&self) -> Option<&GrowthIntegration> {
         self.growth.as_ref()
@@ -134,6 +148,11 @@ impl AgentLoop {
         // Get all messages for context
         let mut messages = self.memory.get_messages(&session_id).await?;
 
+        // Apply compaction if threshold is configured
+        if self.compaction_threshold > 0 {
+            messages = compaction::maybe_compact(messages, self.compaction_threshold);
+        }
+
         // Enhance system prompt with growth memories
         let enhanced_prompt = if let Some(ref growth) = self.growth {
             let base = self.system_prompt.as_deref().unwrap_or("");
@@ -260,7 +279,12 @@ impl AgentLoop {
         self.memory.append_message(&session_id, &user_message).await?;
 
         // Get all messages for context
-        let messages = self.memory.get_messages(&session_id).await?;
+        let mut messages = self.memory.get_messages(&session_id).await?;
+
+        // Apply compaction if threshold is configured
+        if self.compaction_threshold > 0 {
+            messages = compaction::maybe_compact(messages, self.compaction_threshold);
+        }
 
         // Enhance system prompt with growth memories
         let enhanced_prompt = if let Some(ref growth) = self.growth {