fix: 将所有emoji/Unicode特殊字符替换为ASCII安全字符

Windows cmd/PowerShell默认codepage下emoji显示为?号。
全局替换: 👋->移除, 💭->[Thinking], ⚙->*, ✓->[OK], ✗->[FAIL],
◆->>, ⚠->[!], ✅->[OK], •->|/-, →->>>, ✏️->[Edit]等。
❯保留（windows-vtp终端下正常显示）。

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/main/java/com/claudecode/command/impl/ClearCommand.java

@@ -24,6 +24,6 @@ public class ClearCommand implements SlashCommand {
         if (context.agentLoop() != null) {
             context.agentLoop().reset();
         }
-        return AnsiStyle.green("  ✓ Conversation history cleared.");
+        return AnsiStyle.green("  [OK] Conversation history cleared.");
     }
 }

src/main/java/com/claudecode/command/impl/CompactCommand.java

@@ -27,8 +27,8 @@ public class CompactCommand implements SlashCommand {
         if (context.agentLoop() != null) {
             int before = context.agentLoop().getMessageHistory().size();
             context.agentLoop().reset();
-            return AnsiStyle.green("  ✓ Context compacted: " + before + " messages → 1 (system prompt only)");
+            return AnsiStyle.green("  [OK] Context compacted: " + before + " messages -> 1 (system prompt only)");
         }
-        return AnsiStyle.yellow("  ⚠ No active conversation to compact.");
+        return AnsiStyle.yellow("  [!] No active conversation to compact.");
     }
 }

src/main/java/com/claudecode/command/impl/ModelCommand.java

@@ -38,7 +38,7 @@ public class ModelCommand implements SlashCommand {
 
         if (args != null && !args.isBlank()) {
             sb.append("\n");
-            sb.append(AnsiStyle.yellow("  ⚠ Model switching not yet implemented. Set AI_MODEL env variable."));
+            sb.append(AnsiStyle.yellow("  [!] Model switching not yet implemented. Set AI_MODEL env variable."));
         }
 
         return sb.toString();

src/main/java/com/claudecode/console/BannerPrinter.java

@@ -34,7 +34,7 @@ public class BannerPrinter {
 
         out.println(banner);
         out.println(AnsiStyle.bold("  Claude Code (Java)") + AnsiStyle.dim("  v" + VERSION));
-        out.println(AnsiStyle.dim("  Powered by Spring AI  •  Type /help for commands"));
+        out.println(AnsiStyle.dim("  Powered by Spring AI  |  Type /help for commands"));
         out.println();
     }
 
@@ -43,9 +43,9 @@ public class BannerPrinter {
      */
     public static void printCompact(PrintStream out) {
         out.println();
-        out.println(AnsiStyle.BRIGHT_CYAN + AnsiStyle.BOLD + "  ◆ Claude Code (Java)" + AnsiStyle.RESET
+        out.println(AnsiStyle.BRIGHT_CYAN + AnsiStyle.BOLD + "  > Claude Code (Java)" + AnsiStyle.RESET
                 + AnsiStyle.dim("  v" + VERSION));
-        out.println(AnsiStyle.dim("  Type /help for commands  •  Ctrl+D to exit"));
+        out.println(AnsiStyle.dim("  Type /help for commands  |  Ctrl+D to exit"));
         out.println();
     }
 }

src/main/java/com/claudecode/console/MarkdownRenderer.java

@@ -53,7 +53,7 @@ public class MarkdownRenderer {
             }
             // 列表项
             else if (line.stripLeading().startsWith("- ") || line.stripLeading().startsWith("* ")) {
-                out.println("  " + AnsiStyle.CYAN + "•" + AnsiStyle.RESET + " " + renderInline(line.stripLeading().substring(2)));
+                out.println("  " + AnsiStyle.CYAN + "-" + AnsiStyle.RESET + " " + renderInline(line.stripLeading().substring(2)));
             }
             // 分隔线
             else if (line.strip().matches("^-{3,}$") || line.strip().matches("^\\*{3,}$")) {

src/main/java/com/claudecode/console/ThinkingRenderer.java

@@ -22,7 +22,7 @@ public class ThinkingRenderer {
         }
 
         out.println();
-        out.println(AnsiStyle.DIM + AnsiStyle.ITALIC + "  💭 Thinking..." + AnsiStyle.RESET);
+        out.println(AnsiStyle.DIM + AnsiStyle.ITALIC + "  [Thinking...]" + AnsiStyle.RESET);
 
         // 显示 thinking 内容（缩进并用暗色）
         for (String line : thinkingContent.lines().toList()) {
@@ -33,7 +33,7 @@ public class ThinkingRenderer {
 
     /** 渲染 thinking 开始标记 */
     public void renderStart() {
-        out.print(AnsiStyle.DIM + AnsiStyle.ITALIC + "  💭 Thinking..." + AnsiStyle.RESET);
+        out.print(AnsiStyle.DIM + AnsiStyle.ITALIC + "  [Thinking...]" + AnsiStyle.RESET);
     }
 
     /** 渲染 thinking 结束标记 */

src/main/java/com/claudecode/console/ToolStatusRenderer.java

@@ -18,7 +18,7 @@ public class ToolStatusRenderer {
     /** 渲染工具调用开始 */
     public void renderStart(String toolName, String args) {
         out.println(AnsiStyle.dim("  ─────────────────────────────────────────"));
-        out.print(AnsiStyle.YELLOW + "  ⚙ " + AnsiStyle.BOLD + toolName + AnsiStyle.RESET);
+        out.print(AnsiStyle.YELLOW + "  * " + AnsiStyle.BOLD + toolName + AnsiStyle.RESET);
         out.println(AnsiStyle.dim("  running..."));
         // 如果有简短参数，显示
         if (args != null && !args.isBlank()) {
@@ -37,7 +37,7 @@ public class ToolStatusRenderer {
             display = display.substring(0, 497) + "...";
         }
 
-        out.println(AnsiStyle.GREEN + "  ✓ " + AnsiStyle.BOLD + toolName + AnsiStyle.RESET
+        out.println(AnsiStyle.GREEN + "  [OK] " + AnsiStyle.BOLD + toolName + AnsiStyle.RESET
                 + AnsiStyle.dim("  done"));
         if (display != null && !display.isBlank()) {
             // 缩进输出每一行
@@ -50,7 +50,7 @@ public class ToolStatusRenderer {
 
     /** 渲染工具错误 */
     public void renderError(String toolName, String error) {
-        out.println(AnsiStyle.RED + "  ✗ " + AnsiStyle.BOLD + toolName + AnsiStyle.RESET
+        out.println(AnsiStyle.RED + "  [FAIL] " + AnsiStyle.BOLD + toolName + AnsiStyle.RESET
                 + AnsiStyle.red("  error"));
         if (error != null) {
             out.println(AnsiStyle.red("    " + error));

src/main/java/com/claudecode/repl/ClaudeCodeCompleter.java

@@ -61,7 +61,7 @@ public class ClaudeCodeCompleter implements Completer {
                 if (alias.startsWith(prefix)) {
                     candidates.add(new Candidate(
                             "/" + alias,
-                            alias + " → " + name,
+                            alias + " -> " + name,
                             "Aliases",
                             cmd.description(),
                             null, null, true

src/main/java/com/claudecode/repl/ReplSession.java

@@ -154,7 +154,7 @@ public class ReplSession {
                 handleInput(input, cmdContext);
             }
 
-            out.println(AnsiStyle.dim("\n  Goodbye! 👋\n"));
+            out.println(AnsiStyle.dim("\n  Goodbye!\n"));
         }
     }
 
@@ -174,8 +174,8 @@ public class ReplSession {
         out.println(AnsiStyle.dim("  Terminal: " + termInfo));
 
         if (isDumb) {
-            out.println(AnsiStyle.yellow("  ⚠ Dumb 终端模式：Tab补全和行编辑可能受限"));
+            out.println(AnsiStyle.yellow("  [!] Dumb terminal: Tab completion and line editing may be limited"));
-            out.println(AnsiStyle.yellow("    建议在 Windows Terminal / PowerShell / cmd.exe 中运行"));
+            out.println(AnsiStyle.yellow("      Run in Windows Terminal / PowerShell / cmd.exe for best experience"));
         } else {
             out.println(AnsiStyle.dim("  Tip: Tab to complete commands, ↑↓ to browse history, Ctrl+D to exit"));
         }
@@ -211,7 +211,7 @@ public class ReplSession {
             handleInput(input, cmdContext);
         }
 
-        out.println(AnsiStyle.dim("\n  Goodbye! 👋\n"));
+        out.println(AnsiStyle.dim("\n  Goodbye!\n"));
     }
 
     // ==================== 公共输入处理 ====================
@@ -237,7 +237,7 @@ public class ReplSession {
             out.println();
         } catch (Exception e) {
             spinner.stop();
-            out.println(AnsiStyle.red("\n  ✗ Error: " + e.getMessage()));
+            out.println(AnsiStyle.red("\n  [ERROR] " + e.getMessage()));
             log.error("Agent 循环异常", e);
             out.println();
         }

src/main/java/com/claudecode/tool/impl/BashTool.java

@@ -108,6 +108,6 @@ public class BashTool implements Tool {
         if (cmd.length() > 60) {
             cmd = cmd.substring(0, 57) + "...";
         }
-        return "⚡ " + cmd;
+        return "> " + cmd;
     }
 }

src/main/java/com/claudecode/tool/impl/FileEditTool.java

@@ -87,7 +87,7 @@ public class FileEditTool implements Tool {
             long oldLines = oldString.lines().count();
             long newLines = newString.lines().count();
 
-            return "✅ Edited " + path + " (replaced " + oldLines + " lines with " + newLines + " lines)";
+            return "[OK] Edited " + path + " (replaced " + oldLines + " lines with " + newLines + " lines)";
 
         } catch (IOException e) {
             return "Error editing file: " + e.getMessage();
@@ -96,6 +96,6 @@ public class FileEditTool implements Tool {
 
     @Override
     public String activityDescription(Map<String, Object> input) {
-        return "✏️ Editing " + input.getOrDefault("file_path", "file");
+        return "[Edit] " + input.getOrDefault("file_path", "file");
     }
 }

src/main/java/com/claudecode/tool/impl/FileReadTool.java

@@ -118,6 +118,6 @@ public class FileReadTool implements Tool {
 
     @Override
     public String activityDescription(Map<String, Object> input) {
-        return "📄 Reading " + input.getOrDefault("file_path", "file");
+        return "[Read] " + input.getOrDefault("file_path", "file");
     }
 }

src/main/java/com/claudecode/tool/impl/FileWriteTool.java

@@ -67,9 +67,9 @@ public class FileWriteTool implements Tool {
 
             long lines = content.lines().count();
             if (existed) {
-                return "✅ Updated " + path + " (" + lines + " lines)";
+                return "[OK] Updated " + path + " (" + lines + " lines)";
             } else {
-                return "✅ Created " + path + " (" + lines + " lines)";
+                return "[OK] Created " + path + " (" + lines + " lines)";
             }
 
         } catch (IOException e) {
@@ -79,6 +79,6 @@ public class FileWriteTool implements Tool {
 
     @Override
     public String activityDescription(Map<String, Object> input) {
-        return "✏️ Writing " + input.getOrDefault("file_path", "file");
+        return "[Write] " + input.getOrDefault("file_path", "file");
     }
 }

src/main/java/com/claudecode/tool/impl/GlobTool.java

@@ -122,6 +122,6 @@ public class GlobTool implements Tool {
 
     @Override
     public String activityDescription(Map<String, Object> input) {
-        return "🔍 Searching " + input.getOrDefault("pattern", "files");
+        return "[Search] " + input.getOrDefault("pattern", "files");
     }
 }

src/main/java/com/claudecode/tool/impl/GrepTool.java

@@ -164,6 +164,6 @@ public class GrepTool implements Tool {
 
     @Override
     public String activityDescription(Map<String, Object> input) {
-        return "🔍 Searching for '" + input.getOrDefault("pattern", "...") + "'";
+        return "[Grep] '" + input.getOrDefault("pattern", "...") + "'";
     }
 }