Fix remaining compilation errors

- Fix get_memories_by_priority f32 comparison
- Add Datelike import to game_formatter.rs
- Add Datelike import to companion.rs

All compilation errors should now be resolved.

src/companion.rs

@@ -1,7 +1,7 @@
 use crate::memory::Memory;
 use crate::game_formatter::{MemoryRarity, DiagnosisType};
 use serde::{Deserialize, Serialize};
-use chrono::{DateTime, Utc};
+use chrono::{DateTime, Utc, Datelike};
 
 /// コンパニオンキャラクター
 #[derive(Debug, Clone, Serialize, Deserialize)]

src/game_formatter.rs

@@ -1,5 +1,6 @@
 use crate::memory::Memory;
 use serde::{Deserialize, Serialize};
+use chrono::Datelike;
 
 /// メモリーのレア度
 #[derive(Debug, Clone, Serialize, Deserialize)]

src/memory.rs

@@ -238,7 +238,7 @@ impl MemoryManager {
     // 優先度順に記憶を取得
     pub fn get_memories_by_priority(&self) -> Vec<&Memory> {
         let mut memories: Vec<_> = self.memories.values().collect();
-        memories.sort_by(|a, b| b.priority_score.cmp(&a.priority_score));
+        memories.sort_by(|a, b| b.priority_score.partial_cmp(&a.priority_score).unwrap_or(std::cmp::Ordering::Equal));
         memories
     }