fix: respect disabled evolver mcp idle exit

Author: autogame-17

plugins/evolver/.mcp.json

@@ -2,15 +2,18 @@
   "mcpServers": {
     "evolver-proxy": {
       "command": "/opt/homebrew/opt/node@22/bin/node",
-      "args": ["./mcp/evolver-proxy.mjs"],
+      "args": [
+        "./mcp/evolver-proxy.mjs"
+      ],
       "cwd": ".",
       "env": {
         "EVOMAP_PROXY_PORT": "19820",
         "EVOMAP_MCP_PROXY_TIMEOUT_MS": "45000",
         "EVOMAP_MCP_PROXY_HEALTH_TIMEOUT_MS": "2000",
         "NO_PROXY": "127.0.0.1,localhost",
         "no_proxy": "127.0.0.1,localhost",
-        "A2A_HUB_URL": "https://evomap.ai"
+        "A2A_HUB_URL": "https://evomap.ai",
+        "EVOMAP_MCP_IDLE_EXIT_MS": "0"
       }
     }
   }

plugins/evolver/mcp/evolver-proxy.mjs

@@ -25,14 +25,21 @@ const PROXY_FETCH_TIMEOUT_MS = Number(process.env.EVOMAP_MCP_PROXY_TIMEOUT_MS) |
 const PROXY_HEALTH_TIMEOUT_MS = Number(process.env.EVOMAP_MCP_PROXY_HEALTH_TIMEOUT_MS) || 2_000;
 const PROXY_AUTOSTART = String(process.env.EVOMAP_MCP_PROXY_AUTOSTART || '1') !== '0';
 const PROXY_START_TIMEOUT_MS = Number(process.env.EVOMAP_MCP_PROXY_START_TIMEOUT_MS) || 15_000;
-const MCP_IDLE_EXIT_MS = Number(process.env.EVOMAP_MCP_IDLE_EXIT_MS) || 5 * 60_000;
+const MCP_IDLE_EXIT_MS = parseNumberEnv('EVOMAP_MCP_IDLE_EXIT_MS', 5 * 60_000);
 const MAX_FRAME_BYTES = Number(process.env.EVOMAP_MCP_MAX_FRAME_BYTES) || 16 * 1024 * 1024;
 let proxyStartPromise = null;
 const CODEX_GUIDANCE_START = '<!-- evolver-codex-guidance:start -->';
 const CODEX_GUIDANCE_END = '<!-- evolver-codex-guidance:end -->';
 
 function log(...a) { process.stderr.write('[evolver-proxy-mcp] ' + a.join(' ') + '\n'); }
 
+function parseNumberEnv(name, fallback) {
+  const raw = process.env[name];
+  if (raw === undefined || raw === '') return fallback;
+  const value = Number(raw);
+  return Number.isFinite(value) ? value : fallback;
+}
+
 function codexGuidanceSection(language) {
   if (language === 'zh') {
     return `${CODEX_GUIDANCE_START}