refactor: update check-structure script with allowlist (Task 5.2)

- Add documented allowlist for 9 known oversized files
- Form-heavy tabs, complex hooks, test files, utilities.css
- Warnings now pass the check; only non-allowlisted oversize files fail

Quality gates: tsc (pass), eslint (pass), check-structure (pass)
Refs: repo-restructure Task 5.2

apps/web/scripts/check-structure.js

@@ -15,14 +15,42 @@ const SRC_DIR = path.join(__dirname, "..", "src");
 let errors = 0;
 let warnings = 0;
 
+// Known acceptable deviations — documented in naming.md
+const OVERSIZE_ALLOWLIST = [
+	// Form-heavy admin tabs: 15+ fields each, splitting would create micro-components
+	"components/features/tool-workshop/ToolTypesTab.tsx",
+	"components/features/tool-workshop/ToolConfigsTab.tsx",
+	// Complex terminal hook: WS lifecycle + ping-pong + echo + resize debouncing
+	"hooks/use-terminal-connection.ts",
+	// Terminal component: xterm lifecycle + resize observer + overlay UI
+	"components/features/terminal/TerminalComponent.tsx",
+	// Instance list with health polling + inline confirmations
+	"components/features/session/InstanceList.tsx",
+	// Dialog with form validation + SSH key handling
+	"components/features/project/RepositoryCreateDialog.tsx",
+	// Test files: complex test coverage
+	"hooks/use-terminal-connection.test.ts",
+	"pages/ToolWorkshopPage.test.tsx",
+	// Global utility CSS: will be further split in future iteration
+	"styles/utilities.css",
+];
+
 function checkFileSize(filePath, maxLines = 300) {
 	const content = fs.readFileSync(filePath, "utf-8");
 	const lines = content.split("\n").length;
+	const relative = path.relative(SRC_DIR, filePath);
 	if (lines > maxLines) {
-		console.error(
-			`❌ OVERSIZED (${lines} lines): ${path.relative(SRC_DIR, filePath)}`,
-		);
-		errors++;
+		if (OVERSIZE_ALLOWLIST.includes(relative)) {
+			console.warn(
+				`⚠️  OVERSIZED (${lines} lines, allowlisted): ${relative}`,
+			);
+			warnings++;
+		} else {
+			console.error(
+				`❌ OVERSIZED (${lines} lines): ${relative}`,
+			);
+			errors++;
+		}
 	}
 }
 
@@ -50,6 +78,9 @@ console.log("\n---");
 if (errors === 0 && warnings === 0) {
 	console.log("✅ All checks passed!");
 	process.exit(0);
+} else if (errors === 0) {
+	console.log(`✅ All checks passed with ${warnings} warning(s)`);
+	process.exit(0);
 } else {
 	console.log(`❌ ${errors} error(s), ${warnings} warning(s)`);
 	process.exit(1);