revert(proxy): drop the 1-hour cache TTL option and TTL-bucketed write accounting

The forced 1-hour cache_control TTL (schema v14) was a mistake. Injected
breakpoints return to Anthropic's standard 5-minute TTL, caller-owned
markers are preserved verbatim instead of having their TTLs rewritten,
and the 5m/1h cache-write buckets are removed from usage parsing and
pricing (back to the single aggregate cache-creation rate). The cache
TTL selector is removed from the rectifier settings panel along with its
i18n keys in all four locales.

SCHEMA_VERSION returns to 13: the unreleased cache_creation_1h_tokens
column and the v13->v14 migration are removed. The feature never shipped
in a release and the introducing commit was never pushed, so no
databases were stamped v14 outside this machine (local DB verified at
user_version 13).

src-tauri/src/proxy/usage/calculator.rs

@@ -94,20 +94,9 @@ impl CostCalculator {
             Decimal::from(usage.output_tokens) * pricing.output_cost_per_million / million;
         let cache_read_cost =
             Decimal::from(usage.cache_read_tokens) * pricing.cache_read_cost_per_million / million;
-        let (cache_creation_unspecified, cache_creation_5m, cache_creation_1h) =
-            usage.normalized_cache_creation_buckets();
-        let cache_creation_5m_price = pricing.cache_creation_cost_per_million;
-        // The stored cache-creation price is the existing 5-minute rate. Anthropic
-        // prices 5m writes at 1.25x input and 1h writes at 2x input, therefore the
-        // corresponding 1h price is 8/5 of the configured 5m price. Unknown providers
-        // without TTL details retain the configured legacy rate.
-        let cache_creation_1h_price =
-            cache_creation_5m_price * Decimal::from(8u32) / Decimal::from(5u32);
-        let cache_creation_cost = (Decimal::from(cache_creation_unspecified)
-            + Decimal::from(cache_creation_5m))
-            * cache_creation_5m_price
-            / million
-            + Decimal::from(cache_creation_1h) * cache_creation_1h_price / million;
+        let cache_creation_cost = Decimal::from(usage.cache_creation_tokens)
+            * pricing.cache_creation_cost_per_million
+            / million;
 
         // 总成本 = 各项基础成本之和 × 倍率
         let base_total = input_cost + output_cost + cache_read_cost + cache_creation_cost;
@@ -170,8 +159,6 @@ mod tests {
             output_tokens: 500,
             cache_read_tokens: 200,
             cache_creation_tokens: 100,
-            cache_creation_5m_tokens: 0,
-            cache_creation_1h_tokens: 0,
             model: None,
             message_id: None,
         };
@@ -204,8 +191,6 @@ mod tests {
             output_tokens: 500,
             cache_read_tokens: 200,
             cache_creation_tokens: 100,
-            cache_creation_5m_tokens: 0,
-            cache_creation_1h_tokens: 0,
             model: None,
             message_id: None,
         };
@@ -226,25 +211,6 @@ mod tests {
         assert_eq!(cost.total_cost, Decimal::from_str("0.010035").unwrap());
     }
 
-    #[test]
-    fn test_one_hour_cache_creation_uses_premium_rate() {
-        let usage = TokenUsage {
-            cache_creation_tokens: 1_000_000,
-            cache_creation_5m_tokens: 250_000,
-            cache_creation_1h_tokens: 750_000,
-            ..TokenUsage::default()
-        };
-        let pricing = ModelPricing::from_strings("3", "15", "0.3", "3.75").unwrap();
-
-        let cost = CostCalculator::calculate(&usage, &pricing, Decimal::ONE);
-
-        // 250k × $3.75/M + 750k × $6/M = $5.4375.
-        assert_eq!(
-            cost.cache_creation_cost,
-            Decimal::from_str("5.4375").unwrap()
-        );
-    }
-
     #[test]
     fn test_cost_multiplier() {
         let usage = TokenUsage {
@@ -252,8 +218,6 @@ mod tests {
             output_tokens: 0,
             cache_read_tokens: 0,
             cache_creation_tokens: 0,
-            cache_creation_5m_tokens: 0,
-            cache_creation_1h_tokens: 0,
             model: None,
             message_id: None,
         };
@@ -276,8 +240,6 @@ mod tests {
             output_tokens: 500,
             cache_read_tokens: 0,
             cache_creation_tokens: 0,
-            cache_creation_5m_tokens: 0,
-            cache_creation_1h_tokens: 0,
             model: None,
             message_id: None,
         };
@@ -295,8 +257,6 @@ mod tests {
             output_tokens: 1,
             cache_read_tokens: 1,
             cache_creation_tokens: 1,
-            cache_creation_5m_tokens: 0,
-            cache_creation_1h_tokens: 0,
             model: None,
             message_id: None,
         };