Revert "Merge pull request #3657 from code-yeongyu/refactor/replace-zwsp-with-real-spaces"

This reverts commit f1a11f2c92, reversing
changes made to 62c19ce0ef.

src/shared/agent-display-names.ts

@@ -27,10 +27,10 @@ export const AGENT_DISPLAY_NAMES: Record<string, string> = {
 }
 
 const AGENT_LIST_SORT_PREFIXES: Record<string, string> = {
-  sisyphus: "    ",
-  hephaestus: "   ",
-  prometheus: "  ",
-  atlas: " ",
+  sisyphus: "\u200B",
+  hephaestus: "\u200B\u200B",
+  prometheus: "\u200B\u200B\u200B",
+  atlas: "\u200B\u200B\u200B\u200B",
 }
 
 const INVISIBLE_AGENT_CHARACTERS_REGEX = /[\u200B\u200C\u200D\uFEFF]/g
@@ -40,7 +40,7 @@ export function stripInvisibleAgentCharacters(agentName: string): string {
 }
 
 export function stripAgentListSortPrefix(agentName: string): string {
-  return stripInvisibleAgentCharacters(agentName).replace(/^\s+/, "")
+  return stripInvisibleAgentCharacters(agentName)
 }
 
 export function getAgentRuntimeName(configKey: string): string {
@@ -50,20 +50,31 @@ export function getAgentRuntimeName(configKey: string): string {
   return prefix ? `${prefix}${displayName}` : displayName
 }
 
+/**
+ * Get display name for an agent config key.
+ * Uses case-insensitive lookup for backward compatibility.
+ * Returns original key if not found.
+ */
 export function getAgentDisplayName(configKey: string): string {
+  // Try exact match first
   const exactMatch = AGENT_DISPLAY_NAMES[configKey]
   if (exactMatch !== undefined) return exactMatch
-
+  
+  // Fall back to case-insensitive search
   const lowerKey = configKey.toLowerCase()
   for (const [k, v] of Object.entries(AGENT_DISPLAY_NAMES)) {
     if (k.toLowerCase() === lowerKey) return v
   }
-
+  
+  // Unknown agent: return original key
   return configKey
 }
 
+/**
+ * Runtime-facing agent name used for OpenCode list ordering.
+ */
 export function getAgentListDisplayName(configKey: string): string {
-  return getAgentDisplayName(configKey)
+  return getAgentRuntimeName(configKey)
 }
 
 const REVERSE_DISPLAY_NAMES: Record<string, string> = Object.fromEntries(