fix: prevent panic-prone edge cases

Summary:
- Use Reverse for job timestamp sorting to avoid negation overflow edge cases.
- Make secret redaction UTF-8 safe while preserving the previous short-secret threshold.
- Update remaining setup and doctor guidance to use the supported deepseek dispatcher name.

Test plan:
- cargo test -p deepseek-config list_values_redacts --locked
- cargo test -p deepseek-core --locked
- cargo test -p deepseek-tui doctor_endpoint_tests --locked
- cargo fmt --all -- --check
- git diff --check

Supersedes #957.

crates/config/src/lib.rs

@@ -1247,10 +1247,20 @@ fn serialize_http_headers(headers: &BTreeMap<String, String>) -> Option<String>
 }
 
 fn redact_secret(secret: &str) -> String {
-    if secret.len() <= 16 {
+    let chars: Vec<char> = secret.chars().collect();
+    if chars.len() <= 16 {
         return "********".to_string();
     }
-    format!("{}***{}", &secret[..4], &secret[secret.len() - 4..])
+    let prefix: String = chars.iter().take(4).collect();
+    let suffix: String = chars
+        .iter()
+        .rev()
+        .take(4)
+        .collect::<Vec<_>>()
+        .into_iter()
+        .rev()
+        .collect();
+    format!("{prefix}***{suffix}")
 }
 
 #[derive(Debug, Clone, Default)]
@@ -1729,6 +1739,21 @@ mod tests {
         assert_eq!(values.get("api_key").map(String::as_str), Some("********"));
     }
 
+    #[test]
+    fn list_values_redacts_unicode_api_key_without_byte_slicing() {
+        let config = ConfigToml {
+            api_key: Some("密钥密钥密钥密钥123456789".to_string()),
+            ..ConfigToml::default()
+        };
+
+        let values = config.list_values();
+
+        assert_eq!(
+            values.get("api_key").map(String::as_str),
+            Some("密钥密钥***6789")
+        );
+    }
+
     #[cfg(unix)]
     #[test]
     fn save_clamps_existing_config_permissions() {

crates/core/src/lib.rs

@@ -292,7 +292,7 @@ impl JobManager {
 
     pub fn list(&self) -> Vec<JobRecord> {
         let mut out = self.jobs.values().cloned().collect::<Vec<_>>();
-        out.sort_by_key(|job| -job.updated_at);
+        out.sort_by_key(|job| std::cmp::Reverse(job.updated_at));
         out
     }
 
@@ -319,7 +319,7 @@ impl JobManager {
     pub fn load_from_store(&mut self, store: &StateStore) -> Result<()> {
         let persisted = store.list_jobs(Some(500))?;
         for job in persisted {
-            let fallback_status = job_state_status_to_runtime(job.status.clone());
+            let fallback_status = job_state_status_to_runtime(job.status);
             let parsed = Self::parse_persisted_detail(job.detail.as_deref());
             let (status, detail, retry, history) = if let Some(detail_state) = parsed {
                 (

crates/tui/src/main.rs

@@ -1451,7 +1451,7 @@ fn run_setup_status(config: &Config, workspace: &Path) -> Result<()> {
     println!("  {} {}", "·".dimmed(), dotenv_status_line(workspace));
 
     println!();
-    println!("Run `deepseek-tui doctor --json` for a machine-readable check.");
+    println!("Run `deepseek doctor --json` for a machine-readable check.");
     Ok(())
 }
 
@@ -1979,7 +1979,7 @@ async fn run_doctor(config: &Config, workspace: &Path, config_path_override: Opt
             "·".dimmed(),
             crate::utils::display_path(&tools_dir)
         );
-        println!("    Run `deepseek-tui setup --tools` to scaffold a starter dir.");
+        println!("    Run `deepseek setup --tools` to scaffold a starter dir.");
     }
 
     // Plugins directory
@@ -2000,7 +2000,7 @@ async fn run_doctor(config: &Config, workspace: &Path, config_path_override: Opt
             "·".dimmed(),
             crate::utils::display_path(&plugins_dir)
         );
-        println!("    Run `deepseek-tui setup --plugins` to scaffold a starter dir.");
+        println!("    Run `deepseek setup --plugins` to scaffold a starter dir.");
     }
 
     // Storage surfaces (#422 / #440 / #500)
@@ -2291,7 +2291,7 @@ fn run_doctor_json(
         },
         "api_connectivity": {
             "checked": false,
-            "note": "Skipped in --json mode; run `deepseek-tui doctor` for a live check.",
+            "note": "Skipped in --json mode; run `deepseek doctor` for a live check.",
         },
         "capability": provider_capability_report(config),
     });