fix(audit): Batch 2 生产代码 unwrap 替换 (20 处)

P0 修复:
- viking_commands.rs: URI 路径构建 unwrap → ok_or_else 错误传播
- clip.rs: 临时文件路径 unwrap → ok_or_else (防 Windows 中文路径 panic)

P1 修复:
- personality_detector.rs: Mutex lock unwrap → unwrap_or_else 防中毒传播
- pptx.rs: HashMap.get unwrap → expect (来自 keys() 迭代)

P2 修复:
- 4 处 SystemTime.unwrap → expect("system clock is valid")
- 4 处 dev_server URL.parse.unwrap → expect("hardcoded URL is valid")
- 9 处 nl_schedule Regex.unwrap → expect("static regex is valid")
- 5 处 data_masking Regex.unwrap → expect("static regex is valid")
- 2 处 pipeline/state Regex.unwrap → expect("static regex is valid")

全量测试通过: 719 passed, 0 failed

crates/zclaw-hands/src/hands/clip.rs

@@ -459,7 +459,7 @@ impl ClipHand {
         let args = vec![
             "-f", "concat",
             "-safe", "0",
-            "-i", temp_file.to_str().unwrap(),
+            "-i", temp_file.to_str().ok_or_else(|| zclaw_types::ZclawError::HandError("Temp file path is not valid UTF-8".to_string()))?,
             "-c", "copy",
             &config.output_path,
         ];