chore: 提交所有工作进度 — SaaS 后端增强、Admin UI、桌面端集成

包含大量 SaaS 平台改进、Admin 管理后台更新、桌面端集成完善、
文档同步、测试文件重构等内容。为 QA 测试准备干净工作树。

crates/zclaw-kernel/src/config.rs

@@ -54,6 +54,11 @@ pub struct LlmConfig {
     /// Temperature
     #[serde(default = "default_temperature")]
     pub temperature: f32,
+
+    /// Context window size in tokens (default: 128000)
+    /// Used to calculate dynamic compaction threshold.
+    #[serde(default = "default_context_window")]
+    pub context_window: u32,
 }
 
 impl LlmConfig {
@@ -66,6 +71,7 @@ impl LlmConfig {
             api_protocol: ApiProtocol::OpenAI,
             max_tokens: default_max_tokens(),
             temperature: default_temperature(),
+            context_window: default_context_window(),
         }
     }
 
@@ -140,6 +146,10 @@ fn default_temperature() -> f32 {
     0.7
 }
 
+fn default_context_window() -> u32 {
+    128000
+}
+
 impl Default for KernelConfig {
     fn default() -> Self {
         Self {
@@ -151,6 +161,7 @@ impl Default for KernelConfig {
                 api_protocol: ApiProtocol::OpenAI,
                 max_tokens: default_max_tokens(),
                 temperature: default_temperature(),
+                context_window: default_context_window(),
             },
             skills_dir: default_skills_dir(),
         }
@@ -345,6 +356,17 @@ impl KernelConfig {
     pub fn temperature(&self) -> f32 {
         self.llm.temperature
     }
+
+    /// Get context window size in tokens
+    pub fn context_window(&self) -> u32 {
+        self.llm.context_window
+    }
+
+    /// Dynamic compaction threshold = context_window * 0.6
+    /// Leaves 40% headroom for system prompt + response tokens
+    pub fn compaction_threshold(&self) -> usize {
+        (self.llm.context_window as f64 * 0.6) as usize
+    }
 }
 
 // === Preset configurations for common providers ===