feat: add diagnostic log endpoint for revisions and implement download functionality

Introduced a new endpoint `GET /revisions/{revision_id}/diagnostic-log` to retrieve detailed diagnostic logs for specific revisions. Implemented the corresponding handler to generate and return the log in a structured format. Additionally, updated the frontend to include a download button for the diagnostic log, enhancing user accessibility to revision data.

web/src/lib/components/operations/OperationsRevisionsTab.svelte

@@ -13,6 +13,7 @@
 	import RefreshCw from '@lucide/svelte/icons/refresh-cw';
 	import Undo from '@lucide/svelte/icons/undo';
 	import Eye from '@lucide/svelte/icons/eye';
+	import Download from '@lucide/svelte/icons/download';
 
 	type Props = {
 		revisions: RevisionRow[];
@@ -20,10 +21,19 @@
 		onReload: () => void;
 		onOpenPreview: (rev: RevisionRow) => void;
 		onRollbackRequest: (rev: RevisionRow) => void;
+		onDownloadDiagnosticLog: (rev: RevisionRow) => void;
 		formatDate: (d?: string | null) => string;
 	};
 
-	let { revisions, revLoading, onReload, onOpenPreview, onRollbackRequest, formatDate }: Props = $props();
+	let {
+		revisions,
+		revLoading,
+		onReload,
+		onOpenPreview,
+		onRollbackRequest,
+		onDownloadDiagnosticLog,
+		formatDate
+	}: Props = $props();
 </script>
 
 <Card>
@@ -65,6 +75,14 @@
 								<Button variant="ghost" size="icon-sm" onclick={() => onRollbackRequest(rev)}>
 									<Undo class="size-3.5" />
 								</Button>
+								<Button
+									variant="ghost"
+									size="icon-sm"
+									title="Скачать диагностический лог"
+									onclick={() => onDownloadDiagnosticLog(rev)}
+								>
+									<Download class="size-3.5" />
+								</Button>
 							</div>
 						</TableCell>
 					</TableRow>

web/src/routes/operations/+page.svelte

@@ -2,6 +2,7 @@
 	import { onMount } from 'svelte';
 	import { SvelteMap, SvelteSet } from 'svelte/reactivity';
 	import {
+		apiFetch,
 		apiJSON,
 		apiMutate,
 		fetchModuleSourceCatalog,
@@ -172,6 +173,47 @@
 		}
 	}
 
+	function parseDiagnosticLogFilename(contentDisposition: string | null, rev: RevisionRow): string {
+		const fallback = `revision-${rev.id.slice(0, 8)}-diagnostic.log`;
+		if (!contentDisposition) return fallback;
+		const utf8Match = contentDisposition.match(/filename\*\s*=\s*UTF-8''([^;]+)/i);
+		if (utf8Match?.[1]) {
+			try {
+				return decodeURIComponent(utf8Match[1]);
+			} catch {
+				return utf8Match[1];
+			}
+		}
+		const quotedMatch = contentDisposition.match(/filename\s*=\s*"([^"]+)"/i);
+		if (quotedMatch?.[1]) return quotedMatch[1];
+		const plainMatch = contentDisposition.match(/filename\s*=\s*([^;]+)/i);
+		if (plainMatch?.[1]) return plainMatch[1].trim();
+		return fallback;
+	}
+
+	async function downloadRevisionDiagnosticLog(rev: RevisionRow) {
+		try {
+			const res = await apiFetch(`/v1/revisions/${rev.id}/diagnostic-log`, { method: 'GET' });
+			if (!res.ok) {
+				const message = (await res.text()) || `HTTP ${res.status}`;
+				throw new Error(`Не удалось скачать диагностический лог: ${message}`);
+			}
+			const blob = await res.blob();
+			const objectUrl = URL.createObjectURL(blob);
+			const filename = parseDiagnosticLogFilename(res.headers.get('Content-Disposition'), rev);
+			const link = document.createElement('a');
+			link.href = objectUrl;
+			link.download = filename;
+			link.style.display = 'none';
+			document.body.appendChild(link);
+			link.click();
+			link.remove();
+			URL.revokeObjectURL(objectUrl);
+		} catch (e) {
+			toast.error(e instanceof Error ? e.message : String(e));
+		}
+	}
+
 	async function loadJobs() {
 		jobsLoading = true;
 		try {
@@ -730,6 +772,7 @@
 				onReload={loadRevisions}
 				onOpenPreview={openPreview}
 				onRollbackRequest={(rev) => (rollbackTarget = rev)}
+				onDownloadDiagnosticLog={downloadRevisionDiagnosticLog}
 				{formatDate}
 			/>
 		</TabsContent>