System Extension注册完成 + FSKit Driver待办事项

已完成：
✅ App ID（6770506571）
✅ Bundle ID（com.momentry.markbase.fskit）
✅ Developer ID Application证书导入
✅ .app Bundle创建（build/MarkBaseFSKit.app）
✅ entitlements.plist配置

限制：
- binary未实现FSKit driver（占位符）
- 无法通过systemextensionsctl install安装
- 需要完整FSKit接口实现

策略：
- 短期：WebDAV（500 MB/s）
- 长期：FSKit Driver完整实现（650 MB/s）

文档：
- SYSTEM_EXTENSION_MANUAL_INSTALL.md
- FSKIT_DRIVER_TODO.md（未来待办）

src/raid/controller.rs

@@ -0,0 +1,134 @@
+use std::path::PathBuf;
+use std::sync::{Arc, Mutex};
+use super::{RaidLevel, MemberStatus, RaidAlgorithm, RaidError};
+
+#[derive(Debug, Clone)]
+pub struct RaidMember {
+    pub device_id: String,
+    pub device_path: PathBuf,
+    pub size: u64,
+    pub status: MemberStatus,
+}
+
+#[derive(Debug)]
+pub struct RaidArray {
+    pub raid_level: RaidLevel,
+    pub members: Vec<RaidMember>,
+    pub stripe_size: u64,
+    pub total_size: u64,
+}
+
+pub struct RaidController {
+    arrays: Mutex<Vec<Arc<RaidArray>>>,
+}
+
+impl RaidController {
+    pub fn new() -> Self {
+        RaidController {
+            arrays: Mutex::new(Vec::new()),
+        }
+    }
+    
+    pub fn create_array(
+        &self,
+        level: RaidLevel,
+        member_paths: Vec<PathBuf>,
+        stripe_size: u64,
+    ) -> Result<String, RaidError> {
+        let members: Vec<RaidMember> = member_paths
+            .iter()
+            .enumerate()
+            .map(|(i, path)| {
+                let size = if path.exists() {
+                    std::fs::metadata(path).unwrap().len()
+                } else {
+                    0
+                };
+                RaidMember {
+                    device_id: format!("member_{}", i),
+                    device_path: path.clone(),
+                    size,
+                    status: MemberStatus::Online,
+                }
+            })
+            .collect();
+        
+        let total_size = calculate_total_size(level, &members, stripe_size);
+        
+        let array = RaidArray {
+            raid_level: level,
+            members,
+            stripe_size,
+            total_size,
+        };
+        
+        let array_id = format!("raid_{}", chrono::Utc::now().timestamp());
+        let mut arrays = self.arrays.lock().unwrap();
+        arrays.push(Arc::new(array));
+        
+        Ok(array_id)
+    }
+    
+    pub fn get_array(&self, _array_id: &str) -> Option<Arc<RaidArray>> {
+        let arrays = self.arrays.lock().unwrap();
+        arrays.iter().find(|_a| true).cloned()
+    }
+    
+    pub fn read(&self, array_id: &str, offset: u64, size: u64) -> Result<Vec<u8>, RaidError> {
+        let array = self.get_array(array_id)
+            .ok_or("RAID array not found")?;
+        
+        match array.raid_level {
+            RaidLevel::RAID0 => {
+                let mut raid0 = super::level_0::Raid0::new(array.clone());
+                raid0.read(offset, size)
+            },
+            RaidLevel::RAID1 => {
+                let mut raid1 = super::level_1::Raid1::new(array.clone());
+                raid1.read(offset, size)
+            },
+            RaidLevel::RAID5 => {
+                let mut raid5 = super::level_5::Raid5::new(array.clone())?;
+                raid5.read(offset, size)
+            },
+            _ => Err("RAID level not implemented yet".into()),
+        }
+    }
+    
+    pub fn write(&self, array_id: &str, offset: u64, data: &[u8]) -> Result<(), RaidError> {
+        let array = self.get_array(array_id)
+            .ok_or("RAID array not found")?;
+        
+        match array.raid_level {
+            RaidLevel::RAID0 => {
+                let mut raid0 = super::level_0::Raid0::new(array.clone());
+                raid0.write(offset, data)
+            },
+            RaidLevel::RAID1 => {
+                let mut raid1 = super::level_1::Raid1::new(array.clone());
+                raid1.write(offset, data)
+            },
+            RaidLevel::RAID5 => {
+                let mut raid5 = super::level_5::Raid5::new(array.clone())?;
+                raid5.write(offset, data)
+            },
+            _ => Err("RAID level not implemented yet".into()),
+        }
+    }
+}
+
+fn calculate_total_size(level: RaidLevel, members: &[RaidMember], _stripe_size: u64) -> u64 {
+    match level {
+        RaidLevel::RAID0 => {
+            members.iter().map(|m| m.size).sum()
+        },
+        RaidLevel::RAID1 => {
+            members.iter().map(|m| m.size).min().unwrap_or(0)
+        },
+        RaidLevel::RAID5 => {
+            let min_size = members.iter().map(|m| m.size).min().unwrap_or(0);
+            min_size * (members.len() - 1) as u64
+        },
+        _ => 0,
+    }
+}