Add Live Ozan Radio — DeepSeek DJ, Lyria 3, and player chat.

Personal AI station that generates tracks from taste seeds or Spotify; safe to share — secrets and cache are gitignored.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/ozan_radio/chat_store.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from time import time
+
+
+@dataclass
+class ChatTurn:
+    role: str
+    content: str
+    ts: float = field(default_factory=time)
+
+
+class ChatStore:
+    """In-memory chat history for the DJ panel."""
+
+    def __init__(self, max_turns: int = 40) -> None:
+        self._turns: list[ChatTurn] = []
+        self._max = max_turns
+        self.pending_vibe: str = ""
+
+    def add(self, role: str, content: str) -> None:
+        self._turns.append(ChatTurn(role=role, content=content))
+        if len(self._turns) > self._max:
+            self._turns = self._turns[-self._max :]
+
+    def history(self) -> list[dict]:
+        return [{"role": t.role, "content": t.content} for t in self._turns]
+
+    def public_log(self) -> list[dict]:
+        return [
+            {"role": t.role, "content": t.content, "ts": t.ts}
+            for t in self._turns
+            if t.role in ("user", "dj")
+        ]
+
+    def take_vibe_hint(self) -> str:
+        hint = self.pending_vibe.strip()
+        self.pending_vibe = ""
+        return hint