fix: increase max_tokens to 1500, stricter grammar rules

src/services/deepseek.ts

@@ -88,7 +88,7 @@ export async function sendMessageStream(
     body: JSON.stringify({
       messages,
       temperature,
-      max_tokens: 1000,
+      max_tokens: 1500,
     }),
     signal,
   });
@@ -199,7 +199,8 @@ LANGUAGE: ${story.language}
 GENRE: ${story.genre.join(", ")}
 SETTING: ${settingInfo}
 
-IMPORTANT: Respond ONLY in language: ${story.language}. Use proper grammar and spelling.
+IMPORTANT: Respond ONLY in language: ${story.language}. 
+CRITICAL: Use PERFECT grammar and spelling. Double-check every word for typos. No misspellings allowed.
 
 === PLAYER CHARACTER ===
 Name: ${player?.name || "Hero"}
@@ -255,6 +256,7 @@ RIGHT: **"Я ему не доверяю,"** пробормотала она.
 Descriptions and narration — plain text without any asterisks.
 ${oocRules}
 Respond in language: ${story.language}
+CRITICAL: Use PERFECT grammar and spelling. Double-check every word before writing. No typos or misspellings allowed!
 
 === PLAYER CHARACTER ===
 Name: ${player?.name || "Hero"}
@@ -312,7 +314,7 @@ export function buildDynamicContext(
 • Do NOT ask "What do you do?" — end with atmosphere, not questions
 • Format dialogue: **"text"** (double asterisks = bold)
 • React to player's words explicitly
-• Use proper grammar and spelling in the story language
+• CRITICAL: Use PERFECT grammar and spelling. Double-check every word. No typos or misspellings!
 • Characters can only be where they logically should be based on their last known location`
       : "";