fix: use Get-NetTCPConnection for locale-independent port lookup

The netstat-based parser matched the literal English "LISTENING"
state string, which is translated on non-English Windows (e.g.
"ABHÖREN", "ÉCOUTE", "ESCUTANDO"). On those systems the regex matched
zero lines, so killProcessOnPort silently did nothing -- fail-open,
not a regression, but ineffective for the exact users the fix targets.

Replace it with `Get-NetTCPConnection -State Listen -LocalPort <port>`,
which reads the same underlying WinNT API netstat's display layer
translates, so it's unaffected by OS display language. Verified
against a real listening port on this machine (matched the actual
owning PID).

Also fixed a stale duplicate of the "killProcessOnPort is a no-op on
Windows" comment left behind in server/index.js.

packages/web/server/index.js

@@ -1080,8 +1080,8 @@ const openCodeLifecycleRuntime = createOpenCodeLifecycleRuntime({
     return [...new Set(directories)];
   },
   // A managed restart can move OpenCode to a NEW port (the old one may stay
-  // occupied by an orphaned process, e.g. killProcessOnPort is a no-op on
-  // Windows). Rebind the message-stream upstream readers to the current port
+  // occupied if killProcessOnPort/waitForPortRelease didn't free it in time,
+  // on any platform). Rebind the message-stream upstream readers to the current port
   // so the UI keeps receiving events instead of staying pinned to the old
   // process (#2638). The runtime is created later by the startup pipeline;
   // by the time any restart runs, it is assigned.

packages/web/server/lib/opencode/lifecycle.js

@@ -55,15 +55,25 @@ export const createOpenCodeLifecycleRuntime = (deps) => {
 
   const killProcessOnPortWin32 = (port) => {
     try {
-      const result = spawnSync('netstat', ['-ano'], { encoding: 'utf8', timeout: 5000, windowsHide: true });
+      // Get-NetTCPConnection reads the same locale-independent WinNT API
+      // netstat's display layer translates (e.g. "LISTENING" renders as
+      // "ABHÖREN"/"ÉCOUTE"/"ESCUTANDO" on non-English Windows), so this
+      // works regardless of the OS display language.
+      const result = spawnSync(
+        'powershell',
+        [
+          '-NoProfile',
+          '-NonInteractive',
+          '-Command',
+          `Get-NetTCPConnection -State Listen -LocalPort ${Number.parseInt(port, 10)} -ErrorAction SilentlyContinue | Select-Object -ExpandProperty OwningProcess`,
+        ],
+        { encoding: 'utf8', timeout: 5000, windowsHide: true }
+      );
       const output = result.stdout || '';
       const myPid = process.pid;
-      const listeningPidPattern = /^\s*TCP\s+\S*:(\d+)\s+\S+\s+LISTENING\s+(\d+)\s*$/gim;
       const pids = new Set();
-      let match;
-      while ((match = listeningPidPattern.exec(output)) !== null) {
-        if (Number.parseInt(match[1], 10) !== port) continue;
-        const pid = Number.parseInt(match[2], 10);
+      for (const line of output.split(/\r?\n/)) {
+        const pid = Number.parseInt(line.trim(), 10);
         if (pid && pid !== myPid) pids.add(pid);
       }
       for (const pid of pids) {

packages/web/server/lib/opencode/lifecycle.test.js

@@ -627,21 +627,12 @@ describe('killProcessOnPort on Windows', () => {
     Object.defineProperty(process, 'platform', { value: platform, configurable: true });
   };
 
-  const netstatOutput = (port, pid) => [
-    '',
-    'Active Connections',
-    '',
-    '  Proto  Local Address          Foreign Address        State           PID',
-    `  TCP    0.0.0.0:${port}            0.0.0.0:0              LISTENING       ${pid}`,
-    '',
-  ].join('\r\n');
-
   it('force-kills the process listening on the target port via taskkill', () => {
     setPlatform('win32');
     const orphanPid = 54321;
     spawnSyncMock.mockImplementation((cmd) => {
-      if (cmd === 'netstat') {
-        return { stdout: netstatOutput(45678, orphanPid) };
+      if (cmd === 'powershell') {
+        return { stdout: `${orphanPid}\r\n` };
       }
       return { stdout: '' };
     });
@@ -649,7 +640,11 @@ describe('killProcessOnPort on Windows', () => {
     const runtime = createRuntime();
     runtime.killProcessOnPort(45678);
 
-    expect(spawnSyncMock).toHaveBeenCalledWith('netstat', ['-ano'], expect.objectContaining({ windowsHide: true }));
+    expect(spawnSyncMock).toHaveBeenCalledWith(
+      'powershell',
+      expect.arrayContaining([expect.stringContaining('-LocalPort 45678')]),
+      expect.objectContaining({ windowsHide: true })
+    );
     expect(spawnSyncMock).toHaveBeenCalledWith(
       'taskkill',
       ['/PID', String(orphanPid), '/F'],
@@ -660,8 +655,8 @@ describe('killProcessOnPort on Windows', () => {
   it('never force-kills its own process id', () => {
     setPlatform('win32');
     spawnSyncMock.mockImplementation((cmd) => {
-      if (cmd === 'netstat') {
-        return { stdout: netstatOutput(45678, process.pid) };
+      if (cmd === 'powershell') {
+        return { stdout: `${process.pid}\r\n` };
       }
       return { stdout: '' };
     });
@@ -675,8 +670,8 @@ describe('killProcessOnPort on Windows', () => {
   it('does nothing when no process is listening on the target port', () => {
     setPlatform('win32');
     spawnSyncMock.mockImplementation((cmd) => {
-      if (cmd === 'netstat') {
-        return { stdout: netstatOutput(9999, 54321) };
+      if (cmd === 'powershell') {
+        return { stdout: '' };
       }
       return { stdout: '' };
     });