feat(chat): add random public_id and fix users blocked route

- add chats.public_id random identifier with migration 0011
- expose public_id in chat API payloads
- use chat public_id in message search UI label
- fix users router order so /users/blocked no longer conflicts with /users/{user_id}

web/src/chat/types.ts

@@ -4,6 +4,7 @@ export type DeliveryStatus = "sending" | "sent" | "delivered" | "read";
 
 export interface Chat {
   id: number;
+  public_id: string;
   type: ChatType;
   title: string | null;
   display_title?: string | null;

web/src/pages/ChatsPage.tsx

@@ -138,7 +138,10 @@ export function ChatsPage() {
               <p className="px-2 py-1 text-xs text-slate-400">Nothing found</p>
             ) : null}
             <div className="tg-scrollbar max-h-[50vh] space-y-1 overflow-auto">
-              {searchResults.map((message) => (
+              {searchResults.map((message) => {
+                const chatMeta = chats.find((chat) => chat.id === message.chat_id);
+                const chatLabel = chatMeta?.public_id ?? String(message.chat_id);
+                return (
                 <button
                   className="block w-full rounded-lg bg-slate-800/80 px-3 py-2 text-left hover:bg-slate-700/80"
                   key={`search-msg-${message.id}`}
@@ -147,10 +150,11 @@ export function ChatsPage() {
                     setSearchOpen(false);
                   }}
                 >
-                  <p className="mb-1 text-[11px] text-slate-400">chat #{message.chat_id} · msg #{message.id}</p>
+                  <p className="mb-1 text-[11px] text-slate-400">chat {chatLabel} · msg #{message.id}</p>
                   <p className="line-clamp-2 text-sm text-slate-100">{message.text || "[media]"}</p>
                 </button>
-              ))}
+                );
+              })}
             </div>
           </div>
         </div>