feat(tag): 支持从多个配置文件读取版本并交互选择

将 `read_project_version` 重构为 `read_project_versions`，支持从 Cargo.toml、package.json、pyproject.toml 等多个配置文件同时读取版本。当检测到多个版本时，提供交互式选择界面让用户决定使用哪个版本。

src/commands/tag.rs

@@ -8,8 +8,8 @@ use std::path::PathBuf;
 use crate::config::{Language, manager::ConfigManager};
 use crate::generator::ContentGenerator;
 use crate::git::tag::{
-    TagBuilder, VersionBump, bump_version, get_latest_version, read_project_version,
-    suggest_version_bump,
+    ConfigVersion, TagBuilder, VersionBump, bump_version, get_latest_version,
+    read_project_versions, suggest_version_bump,
 };
 use crate::git::{GitRepo, find_repo};
 use crate::i18n::Messages;
@@ -343,14 +343,23 @@ impl TagCommand {
         let project_dir = std::env::current_dir()?;
 
         // 1. Try reading from project config files
-        if let Some(version) = read_project_version(&project_dir) {
-            let tag_name = format!("{}{}", prefix, version);
-            println!(
-                "{} {}",
-                messages.latest_version(),
-                tag_name.cyan()
-            );
-            return Ok(tag_name);
+        let config_versions = read_project_versions(&project_dir);
+
+        if !config_versions.is_empty() {
+            if config_versions.len() == 1 {
+                let cv = &config_versions[0];
+                let tag_name = format!("{}{}", prefix, cv.version);
+                println!(
+                    "{} ({}): {}",
+                    messages.found_version_in(),
+                    cv.source,
+                    tag_name.cyan()
+                );
+                return Ok(tag_name);
+            }
+
+            // Multiple config files: let user choose
+            return self.select_config_version(&config_versions, prefix, messages);
         }
 
         // 2. Fall back to commit analysis
@@ -385,6 +394,29 @@ impl TagCommand {
         Ok(tag_name)
     }
 
+    fn select_config_version(
+        &self,
+        config_versions: &[ConfigVersion],
+        prefix: &str,
+        messages: &Messages,
+    ) -> Result<String> {
+        println!("\n{}", messages.found_multiple_versions().bold());
+
+        let items: Vec<String> = config_versions
+            .iter()
+            .map(|cv| format!("{} → {}{}", cv.source, prefix, cv.version))
+            .collect();
+
+        let selection = Select::new()
+            .with_prompt(messages.select_version_to_use())
+            .items(&items)
+            .default(0)
+            .interact()?;
+
+        let cv = &config_versions[selection];
+        Ok(format!("{}{}", prefix, cv.version))
+    }
+
     fn input_message_interactive(&self, version: &str, messages: &Messages) -> Result<String> {
         let default_msg = format!("Release {}", version);