refactor: simplify compress notification summary and rename header wrapper

- Rename `addCompressedBlockHeader` to `wrapCompressedSummary` to better reflect it wraps with both header and footer.

- Pass `injected.expandedSummary` directly to `sendCompressNotification` instead of the wrapped summary, avoiding unnecessary header manipulation for the notification display.

Author: Tarquinen

lib/tools/compress-utils.ts

@@ -509,7 +509,7 @@ export function allocateBlockId(summaries: CompressSummary[]): number {
     return max + 1
 }
 
-export function addCompressedBlockHeader(blockId: number, summary: string): string {
+export function wrapCompressedSummary(blockId: number, summary: string): string {
     const header = formatCompressedBlockHeader(blockId)
     const footer = formatCompressedBlockFooter(blockId)
     const body = summary.trim()

lib/tools/compress.ts

@@ -3,7 +3,7 @@ import type { ToolContext } from "./types"
 import { COMPRESS_TOOL_SPEC } from "../prompts"
 import { ensureSessionInitialized } from "../state"
 import {
-    addCompressedBlockHeader,
+    wrapCompressedSummary,
     allocateBlockId,
     applyCompressionState,
     buildSearchContext,
@@ -102,7 +102,7 @@ export function createCompressTool(ctx: ToolContext): ReturnType<typeof tool> {
             )
 
             const blockId = allocateBlockId(ctx.state.compressSummaries)
-            const storedSummary = addCompressedBlockHeader(blockId, injected.expandedSummary)
+            const storedSummary = wrapCompressedSummary(blockId, injected.expandedSummary)
             const summaryTokens = countSummaryTokens(storedSummary)
 
             const applied = applyCompressionState(
@@ -129,7 +129,7 @@ export function createCompressTool(ctx: ToolContext): ReturnType<typeof tool> {
                 range.toolIds,
                 applied.messageIds,
                 compressArgs.topic,
-                storedSummary,
+                injected.expandedSummary,
                 summaryTokens,
                 totalSessionTokens,
                 applied.compressedTokens,