revert part of #14811. it makes no sense to show the initial value, it just makes things inconsistent with deriveds. personally i find it more confusing anyway

Author: Rich-Harris

packages/svelte/src/internal/client/dev/tracing.js

@@ -20,7 +20,7 @@ export let tracing_expressions = null;
  * @param {TraceEntry} [entry]
  */
 function log_entry(signal, entry) {
-	const value = signal.trace_need_increase ? signal.trace_v : signal.v;
+	const value = signal.v;
 
 	if (value === UNINITIALIZED) {
 		return;

packages/svelte/src/internal/client/reactivity/sources.js

@@ -170,7 +170,6 @@ export function internal_set(source, value) {
 
 			if (active_effect !== null) {
 				source.trace_need_increase = true;
-				source.trace_v ??= old_value;
 			}
 		}
 

packages/svelte/src/internal/client/reactivity/types.d.ts

@@ -21,7 +21,6 @@ export interface Value<V = unknown> extends Signal {
 	created?: Error | null;
 	updated?: Error | null;
 	trace_need_increase?: boolean;
-	trace_v?: V;
 }
 
 export interface Reaction extends Signal {

packages/svelte/src/internal/client/runtime.js

@@ -454,7 +454,6 @@ export function update_effect(effect) {
 				if (dep.trace_need_increase) {
 					dep.wv = increment_write_version();
 					dep.trace_need_increase = undefined;
-					dep.trace_v = undefined;
 				}
 			}
 		}

packages/svelte/tests/runtime-runes/samples/inspect-trace-reassignment/_config.js

@@ -36,14 +36,14 @@ export default test({
 			{ log: true },
 			{ log: '$state', highlighted: true },
 			{ log: 'count', highlighted: false },
-			{ log: 1 },
+			{ log: 2 },
 			{ log: 'effect' },
 			{ log: '$state', highlighted: false },
 			{ log: 'checked', highlighted: false },
 			{ log: true },
 			{ log: '$state', highlighted: true },
 			{ log: 'count', highlighted: false },
-			{ log: 2 },
+			{ log: 3 },
 			{ log: 'effect' },
 			{ log: '$state', highlighted: false },
 			{ log: 'checked', highlighted: false },