Fluentslider rapid-fire bug fix (openfrontio#2778)

## Description:

Describe the PR.

Modified FluentSlider(my code) to split number input handle to visual
update(NumberInput) and dispatch value(NumberComplete)

updated the event flow to match them, will fix rapid-fire updates that
seemed to glitch bots out.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

jackochess

Author: VectorSophie

src/client/LocalServer.ts

@@ -132,7 +132,10 @@ export class LocalServer {
       if (!this.lobbyConfig.gameRecord) {
         if (clientMsg.turnNumber % 100 === 0) {
           // In singleplayer, only store hash every 100 turns to reduce size of game record.
-          this.turns[clientMsg.turnNumber].hash = clientMsg.hash;
+          const turn = this.turns[clientMsg.turnNumber];
+          if (turn) {
+            turn.hash = clientMsg.hash;
+          }
         }
         return;
       }

src/client/components/FluentSlider.ts

@@ -84,7 +84,7 @@ export class FluentSlider extends LitElement {
     this.dispatchValueChange();
   }
 
-  private handleNumberChange(e: Event) {
+  private handleNumberInput(e: Event) {
     const target = e.target as HTMLInputElement;
     let val = target.valueAsNumber;
     if (isNaN(val)) {
@@ -93,11 +93,19 @@ export class FluentSlider extends LitElement {
     if (val < this.min) val = this.min;
     if (val > this.max) val = this.max;
     this.value = val;
+    // Don't dispatch value change on every input - only on blur/enter
+  }
+
+  private handleNumberComplete() {
+    // Dispatch the value change when editing is complete
     this.dispatchValueChange();
   }
 
   private handleNumberKeyDown(e: KeyboardEvent) {
-    if (e.key === "Enter") this.isEditing = false;
+    if (e.key === "Enter") {
+      this.isEditing = false;
+      this.handleNumberComplete();
+    }
   }
 
   private enableEditing() {
@@ -125,8 +133,11 @@ export class FluentSlider extends LitElement {
                 .min=${this.min}
                 .max=${this.max}
                 .valueAsNumber=${this.value}
-                @input=${this.handleNumberChange}
-                @blur=${() => (this.isEditing = false)}
+                @input=${this.handleNumberInput}
+                @blur=${() => {
+                  this.isEditing = false;
+                  this.handleNumberComplete();
+                }}
                 @keydown=${this.handleNumberKeyDown}
               />`
             : html`<span