Display "Copilot instructions" badge for .github/instructions/ files

Files in .github/instructions/ that don't match *.instructions.md pattern
were falling through to the default "agents" type. Simplified the check to
classify all files in that directory as copilot type, and updated the badge
label from "Copilot" to "Copilot instructions".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Entire-Checkpoint: 4aff29dfc8d7

Author: cteyton

frontend/src/components/ContextTreeView.tsx

@@ -92,7 +92,7 @@ function getFileTypeBadge(
 			};
 		case "copilot":
 			return {
-				label: "Copilot",
+				label: "Copilot instructions",
 				className: "bg-slate-600/40 text-slate-300",
 			};
 		case "rules":

src/shared/file-system/context-files-summarizer.ts

@@ -61,11 +61,8 @@ export function getContextFileType(
 		return "copilot";
 	}
 
-	// New pattern: *.instructions.md in .github/instructions/ directory
-	if (
-		filename.endsWith(".instructions.md") &&
-		filePath.includes(".github/instructions/")
-	) {
+	// Files in .github/instructions/ directory (Copilot instructions)
+	if (filePath.includes(".github/instructions/")) {
 		return "copilot";
 	}