feat(metadata): Enhance metadata generation for repository browsing

feat(utils): Add parseRepoPath function to extract repository name and revision from URL path

packages/web/src/app/[domain]/browse/[...path]/page.tsx

@@ -3,6 +3,36 @@ import { getBrowseParamsFromPathParam } from "../hooks/utils";
 import { CodePreviewPanel } from "./components/codePreviewPanel";
 import { Loader2 } from "lucide-react";
 import { TreePreviewPanel } from "./components/treePreviewPanel";
+import { Metadata } from "next";
+import { parseRepoPath } from "@/lib/utils";
+
+type Props = {
+  params: {
+    domain: string;
+    path: string[];
+  };
+};
+
+export async function generateMetadata({ params }: Props): Promise<Metadata> {
+  let title = 'Browse'; // Current Default
+
+  try {
+    const parsedInfo = parseRepoPath(params.path);
+
+    if (parsedInfo) {
+      const { fullRepoName, revision } = parsedInfo;
+      title = `${fullRepoName}${revision ? ` @ ${revision}` : ''}`;
+    }
+  } catch (error) {
+    // Log the error for debugging, but don't crash the page render.
+    console.error("Failed to generate metadata title from path:", params.path, error);
+  }
+
+  return {
+    title, // e.g., "sourcebot-dev/sourcebot @ HEAD"
+  };
+}
+
 
 interface BrowsePageProps {
     params: Promise<{

packages/web/src/app/layout.tsx

@@ -11,9 +11,15 @@ import { PlanProvider } from "@/features/entitlements/planProvider";
 import { getEntitlements } from "@sourcebot/shared";
 
 export const metadata: Metadata = {
-    title: "Sourcebot",
-    description: "Sourcebot is a self-hosted code understanding tool. Ask questions about your codebase and get rich Markdown answers with inline citations.",
-    manifest: "/manifest.json",
+  // Using the title.template will allow child pages to set the title
+  // while keeping a consistent suffix.
+  title: {
+    default: "Sourcebot",
+    template: "%s | Sourcebot",
+  },
+  description:
+    "Sourcebot is a self-hosted code understanding tool. Ask questions about your codebase and get rich Markdown answers with inline citations.",
+  manifest: "/manifest.json",
 };
 
 export default function RootLayout({

packages/web/src/lib/utils.ts

@@ -486,4 +486,56 @@ export const isHttpError = (error: unknown, status: number): boolean => {
         && typeof error === 'object'
         && 'status' in error 
         && error.status === status;
+}
+
+
+/**
+ * Parses a URL path array to extract the full repository name and revision.
+ * This function assumes a URL structure like:
+ * `.../[hostname]/[owner]/[repo@revision]/-/tree/...`
+ * Or for nested groups (like GitLab):
+ * `.../[hostname]/[group]/[subgroup]/[repo@revision]/-/tree/...`
+ *
+ * @param path The array of path segments from Next.js params.
+ * @returns An object with fullRepoName and revision, or null if parsing fails.
+ */
+export const parseRepoPath = (path: string[]): { fullRepoName: string; revision: string } | null => {
+  if (path.length < 2) {
+    return null; // Not enough path segments to parse.
+  }
+
+  // Find the index of the `-` delimiter which separates the repo info from the file tree info.
+  const delimiterIndex = path.indexOf('-');
+
+  // If no delimiter is found, we can't reliably parse the path.
+  if (delimiterIndex === -1) {
+    return null;
+  }
+
+  // The repository parts are between the hostname (index 0) and the delimiter.
+  // e.g., ["github.com", "sourcebot-dev", "sourcebot"] -> slice will be ["sourcebot-dev", "sourcebot"]
+  const repoParts = path.slice(1, delimiterIndex);
+
+  if (repoParts.length === 0) {
+    return null;
+  }
+
+  // The last part of the repo segment potentially contains the revision.
+  const lastPart = repoParts[repoParts.length - 1];
+
+  // URL segments are encoded. Decode it to handle characters like '@' (%40).
+  const decodedLastPart = decodeURIComponent(lastPart);
+
+  const [repoNamePart, revision = ''] = decodedLastPart.split('@');
+
+  // The preceding parts form the owner/group path.
+  // e.g., ["sourcebot"] or ["my-group", "my-subgroup"]
+  const ownerParts = repoParts.slice(0, repoParts.length - 1);
+
+  // Reconstruct the full repository name.
+  // e.g., "sourcebot-dev" + "/" + "sourcebot"
+  // e.g., "my-group/my-subgroup" + "/" + "my-repo"
+  const fullRepoName = [...ownerParts, repoNamePart].join('/');
+
+  return { fullRepoName, revision };
 }