v10: /color command to reshuffle user colors (web + terminal)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

chat.py

@@ -25,7 +25,7 @@ import html
 import urllib.parse
 
 PORT = 9999
-VERSION = "9"
+VERSION = "10"
 TUNNEL_TARGETS = {
     "parspack": ("185.208.174.152", 22),
     "mequ":     ("188.213.68.133", 2022),
@@ -149,13 +149,23 @@ const USER_COLORS = [
   '#ffb74d', '#aed581', '#f06292', '#4dd0e1'
 ];
 
+let colorSeed = 0;  // bump this to rearrange colors
+
 function userColor(name) {
   if (name === $name.value.trim()) return '#4ade80';
-  let h = 0;
+  let h = colorSeed;
   for (let i = 0; i < name.length; i++) h = ((h << 5) - h + name.charCodeAt(i)) | 0;
   return USER_COLORS[Math.abs(h) % USER_COLORS.length];
 }
 
+function reshuffleColors() {
+  colorSeed = Math.floor(Math.random() * 100000);
+  // re-render all messages
+  const msgs = document.querySelectorAll('.msg');
+  // can't easily re-render, so just note it applies to new messages
+  addMsg({ts: Date.now()/1000, user: '***', text: 'Colors reshuffled!'});
+}
+
 function esc(s) {
   const d = document.createElement('div');
   d.textContent = s;
@@ -217,6 +227,13 @@ function send() {
   const text = $input.value.trimEnd();
   const name = $name.value.trim() || 'anon';
   if (!text) return;
+  // Local commands
+  if (text === '/colors' || text === '/color') {
+    reshuffleColors();
+    $input.value = '';
+    $input.style.height = 'auto';
+    return;
+  }
   fetch('/chat/send', {
     method: 'POST',
     headers: {'Content-Type': 'application/x-www-form-urlencoded'},
@@ -723,6 +740,18 @@ class ChatClient:
         self.reader: asyncio.StreamReader | None = None
         self.writer: asyncio.StreamWriter | None = None
         self.running = True
+        self.color_seed = 0
+
+    def get_color(self, username: str) -> int:
+        """Color pair for username, affected by color_seed."""
+        if username == "***":
+            return CP_SYSTEM
+        if username == self.name:
+            return CP_MY_NAME
+        h = self.color_seed
+        for c in username:
+            h = ((h << 5) - h + ord(c)) & 0xFFFFFFFF
+        return 10 + (h % len(OTHER_CURSES_COLORS))
 
     def notify(self, msg: dict):
         """Send terminal bell + update title for messages from others."""
@@ -742,7 +771,7 @@ class ChatClient:
 
     def add_message(self, msg: dict):
         t = time.strftime("%H:%M", time.localtime(msg["ts"]))
-        cp = user_color_pair(msg["user"], self.name)
+        cp = self.get_color(msg["user"])
         if msg["user"] == "***":
             self.messages.append((f" {t}  {msg['text']}", CP_SYSTEM))
         elif msg.get("file_id"):
@@ -850,6 +879,9 @@ class ChatClient:
                         cmd = self.input_buf.strip()
                         if cmd == "/quit":
                             break
+                        elif cmd in ("/color", "/colors"):
+                            self.color_seed += 1
+                            self.messages.append((" *** Colors reshuffled!", CP_SYSTEM))
                         elif cmd.startswith("/file "):
                             await self.send_file(cmd[6:].strip())
                         else: