fix: cut the middle of a capped hub result instead of repeating its tail

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/src/lib/components/copilot/chat/shared.test.ts

@@ -1433,7 +1433,10 @@ describe('createSearchHubScriptsTool', () => {
 			toolCallbacks: { setToolStatus: vi.fn() }
 		} as any)
 
-		expect(JSON.parse(raw).results.map((r: any) => r.integration)).toContain('salesforce')
+		const integrations = JSON.parse(raw).results.map((r: any) => r.integration)
+		expect(integrations).toContain('salesforce')
+		// reserving room for the tail must not re-emit it when nothing was cut
+		expect(new Set(integrations).size).toBe(integrations.length)
 	})
 
 	// Ranking buries an integration the query names when other integrations' scripts

frontend/src/lib/components/copilot/chat/shared.ts

@@ -1519,14 +1519,13 @@ export const createSearchHubScriptsTool = (withContent: boolean = false) => ({
 		}
 
 		// Each result costs a content fetch, so cap the fan-out when content is wanted.
-		// Keep the tail: hits appended for a named integration sit there, and dropping
-		// them would undo the reason they were fetched.
-		const matches = withContent
-			? [
-					...scripts.slice(0, MAX_FETCHED_HUB_SCRIPTS - mentionedHits),
-					...scripts.slice(scripts.length - mentionedHits)
-				]
-			: scripts
+		// Cut from the middle: hits appended for a named integration sit at the tail,
+		// and dropping those would undo the reason they were fetched.
+		let matches = scripts
+		if (withContent && scripts.length > MAX_FETCHED_HUB_SCRIPTS) {
+			const mentioned = scripts.slice(scripts.length - mentionedHits)
+			matches = [...scripts.slice(0, MAX_FETCHED_HUB_SCRIPTS - mentioned.length), ...mentioned]
+		}
 		toolCallbacks.setToolStatus(toolId, {
 			content: `Found ${matches.length} hub script${matches.length === 1 ? '' : 's'} for ${subject}`
 		})