feat(ui): dashboard github stats, sidebar UX, polish

- Add live GitHub stats and commits to dashboard with
  sticky two-column layout and GitHub card link
- Auto-expand sidebar when navigating to files/projects
  while collapsed
- Add GitHub link to landing page
- Restyle storage indicator with sidebar tokens
- Fix nav-user readability with sidebar-foreground tokens
- Update favicon to colored compass logo

src/app/dashboard/page.tsx

@@ -1,13 +1,79 @@
 import { Button } from "@/components/ui/button"
-import { IconExternalLink } from "@tabler/icons-react"
+import {
+  IconBrandGithub,
+  IconExternalLink,
+  IconGitCommit,
+  IconGitFork,
+  IconStar,
+  IconAlertCircle,
+  IconEye,
+} from "@tabler/icons-react"
 
-const GITHUB_URL =
-  "https://github.com/High-Performance-Structures/compass"
+const REPO = "High-Performance-Structures/compass"
+const GITHUB_URL = `https://github.com/${REPO}`
+
+type RepoStats = {
+  stargazers_count: number
+  forks_count: number
+  open_issues_count: number
+  subscribers_count: number
+}
+
+type Commit = {
+  sha: string
+  commit: {
+    message: string
+    author: { name: string; date: string }
+  }
+  html_url: string
+}
+
+async function getRepoData() {
+  try {
+    const [repoRes, commitsRes] = await Promise.all([
+      fetch(`https://api.github.com/repos/${REPO}`, {
+        next: { revalidate: 300 },
+        headers: { Accept: "application/vnd.github+json" },
+      }),
+      fetch(`https://api.github.com/repos/${REPO}/commits?per_page=8`, {
+        next: { revalidate: 300 },
+        headers: { Accept: "application/vnd.github+json" },
+      }),
+    ])
+
+    if (!repoRes.ok || !commitsRes.ok) return null
+
+    const repo: RepoStats = await repoRes.json()
+    const commits: Commit[] = await commitsRes.json()
+    return { repo, commits }
+  } catch {
+    return null
+  }
+}
+
+function timeAgo(date: string) {
+  const seconds = Math.floor(
+    (Date.now() - new Date(date).getTime()) / 1000
+  )
+  if (seconds < 60) return "just now"
+  const minutes = Math.floor(seconds / 60)
+  if (minutes < 60) return `${minutes}m ago`
+  const hours = Math.floor(minutes / 60)
+  if (hours < 24) return `${hours}h ago`
+  const days = Math.floor(hours / 24)
+  if (days < 30) return `${days}d ago`
+  return new Date(date).toLocaleDateString("en-US", {
+    month: "short",
+    day: "numeric",
+  })
+}
+
+export default async function Page() {
+  const data = await getRepoData()
 
-export default function Page() {
   return (
     <div className="flex flex-1 items-start justify-center p-6 md:p-12">
-      <div className="w-full max-w-3xl py-8">
+      <div className="w-full max-w-6xl py-8">
         <div className="mb-10 text-center">
           <span
             className="mx-auto mb-3 block size-12 bg-foreground"
@@ -29,6 +95,7 @@ export default function Page() {
           </p>
         </div>
 
+        <div className="grid gap-10 lg:grid-cols-2">
           <div className="space-y-8 text-sm leading-relaxed">
             <section>
               <h2 className="mb-3 text-base font-semibold flex items-center gap-2">
@@ -90,21 +157,104 @@ export default function Page() {
                 <li>Advanced scheduling (resource leveling, baseline comparison)</li>
               </ul>
             </section>
+
           </div>
 
-        <div className="mt-10 flex justify-center">
-          <Button variant="outline" asChild>
+          {data && (
+            <div className="lg:sticky lg:top-6 lg:self-start space-y-6">
               <a
                 href={GITHUB_URL}
                 target="_blank"
                 rel="noopener noreferrer"
+                className="hover:bg-muted/50 border rounded-lg px-4 py-3 flex items-center gap-3 transition-colors"
               >
-              <IconExternalLink className="mr-2 size-4" />
-              View on GitHub
+                <IconBrandGithub className="size-5 shrink-0" />
+                <div className="min-w-0">
+                  <p className="text-sm font-medium">View on GitHub</p>
+                  <p className="text-muted-foreground text-xs truncate">{REPO}</p>
+                </div>
+                <IconExternalLink className="text-muted-foreground size-3.5 shrink-0 ml-auto" />
               </a>
-          </Button>
+              <div className="grid grid-cols-2 gap-3">
+                <StatCard
+                  icon={<IconStar className="size-4" />}
+                  label="Stars"
+                  value={data.repo.stargazers_count}
+                />
+                <StatCard
+                  icon={<IconGitFork className="size-4" />}
+                  label="Forks"
+                  value={data.repo.forks_count}
+                />
+                <StatCard
+                  icon={<IconAlertCircle className="size-4" />}
+                  label="Issues"
+                  value={data.repo.open_issues_count}
+                />
+                <StatCard
+                  icon={<IconEye className="size-4" />}
+                  label="Watchers"
+                  value={data.repo.subscribers_count}
+                />
+              </div>
+
+              <div>
+                <h2 className="text-muted-foreground mb-3 text-xs font-medium uppercase tracking-wider">
+                  Recent Commits
+                </h2>
+                <div className="border rounded-lg divide-y">
+                  {data.commits.map((commit) => (
+                    <a
+                      key={commit.sha}
+                      href={commit.html_url}
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="hover:bg-muted/50 flex items-start gap-3 px-4 py-3 transition-colors"
+                    >
+                      <IconGitCommit className="text-muted-foreground mt-0.5 size-4 shrink-0" />
+                      <div className="min-w-0 flex-1">
+                        <p className="truncate text-sm">
+                          {commit.commit.message.split("\n")[0]}
+                        </p>
+                        <p className="text-muted-foreground mt-0.5 text-xs">
+                          {commit.commit.author.name}
+                          <span className="mx-1.5">·</span>
+                          {timeAgo(commit.commit.author.date)}
+                        </p>
+                      </div>
+                      <code className="text-muted-foreground shrink-0 font-mono text-xs">
+                        {commit.sha.slice(0, 7)}
+                      </code>
+                    </a>
+                  ))}
+                </div>
+              </div>
+            </div>
+          )}
         </div>
       </div>
     </div>
   )
 }
+
+function StatCard({
+  icon,
+  label,
+  value,
+}: {
+  icon: React.ReactNode
+  label: string
+  value: number
+}) {
+  return (
+    <div className="border rounded-lg px-4 py-3">
+      <div className="text-muted-foreground mb-1 flex items-center gap-1.5 text-xs">
+        {icon}
+        {label}
+      </div>
+      <p className="text-2xl font-semibold tabular-nums">
+        {value.toLocaleString()}
+      </p>
+    </div>
+  )
+}

src/components/app-sidebar.tsx

@@ -78,7 +78,7 @@ function SidebarNav({
   projects: { id: string; name: string }[]
 }) {
   const pathname = usePathname()
-  const { state } = useSidebar()
+  const { state, setOpen } = useSidebar()
   const { open: openSearch } = useCommandMenu()
   const { open: openSettings } = useSettings()
   const isExpanded = state === "expanded"
@@ -86,6 +86,13 @@ function SidebarNav({
   const isProjectMode = /^\/dashboard\/projects\/[^/]+/.test(
     pathname ?? ""
   )
+
+  React.useEffect(() => {
+    if ((isFilesMode || isProjectMode) && !isExpanded) {
+      setOpen(true)
+    }
+  }, [isFilesMode, isProjectMode, isExpanded, setOpen])
+
   const showContext = isExpanded && (isFilesMode || isProjectMode)
 
   const mode = showContext && isFilesMode

src/components/files/storage-indicator.tsx

@@ -1,6 +1,5 @@
 "use client"
 
-import { Progress } from "@/components/ui/progress"
 import { formatFileSize } from "@/lib/file-utils"
 import type { StorageUsage } from "@/lib/files-data"
 
@@ -8,14 +7,15 @@ export function StorageIndicator({ usage }: { usage: StorageUsage }) {
   const percent = Math.round((usage.used / usage.total) * 100)
 
   return (
-    <div className="px-3 py-2">
-      <div className="flex items-center justify-between text-xs text-muted-foreground mb-1.5">
-        <span>Storage</span>
-        <span>{percent}% used</span>
+    <div className="space-y-2">
+      <div className="bg-sidebar-foreground/20 h-1.5 w-full overflow-hidden rounded-full">
+        <div
+          className="bg-sidebar-primary h-full rounded-full transition-all"
+          style={{ width: `${percent}%` }}
+        />
       </div>
-      <Progress value={percent} className="h-1.5" />
-      <p className="text-xs text-muted-foreground mt-1.5">
-        {formatFileSize(usage.used)} of {formatFileSize(usage.total)}
+      <p className="text-sidebar-foreground/70 text-xs">
+        {formatFileSize(usage.used)} of {formatFileSize(usage.total)} used
       </p>
     </div>
   )

src/components/nav-files.tsx

@@ -19,7 +19,6 @@ import {
   SidebarMenu,
   SidebarMenuButton,
   SidebarMenuItem,
-  SidebarSeparator,
 } from "@/components/ui/sidebar"
 import { cn } from "@/lib/utils"
 
@@ -84,8 +83,7 @@ export function NavFiles() {
           </SidebarMenu>
         </SidebarGroupContent>
       </SidebarGroup>
-      <div className="mt-auto">
-        <SidebarSeparator />
+      <div className="mt-auto px-3 pb-3">
         <StorageIndicator usage={mockStorageUsage} />
       </div>
     </>

src/components/nav-user.tsx

@@ -57,12 +57,12 @@ export function NavUser({
                 <AvatarFallback className="rounded-lg">MV</AvatarFallback>
               </Avatar>
               <div className="grid flex-1 text-left text-sm leading-tight">
-                <span className="truncate font-medium">{user.name}</span>
-                <span className="text-muted-foreground truncate text-xs">
+                <span className="text-sidebar-foreground truncate font-medium">{user.name}</span>
+                <span className="text-sidebar-foreground/70 truncate text-xs">
                   {user.email}
                 </span>
               </div>
-              <IconDotsVertical className="ml-auto size-4" />
+              <IconDotsVertical className="text-sidebar-foreground/70 ml-auto size-4" />
             </SidebarMenuButton>
           </DropdownMenuTrigger>
           <DropdownMenuContent