Rebuild website from scratch on Tailwind v4 + shadcn/ui

- Fresh Astro 5 project with Tailwind v4 and shadcn/ui olive preset
- All shadcn components installed (Card, Button, Badge, Separator, etc.)
- Homepage with hero, terminal demo, workflows, agents, sources, compute
- Full docs system with 24 markdown pages across 5 sections
- Sidebar navigation with active state highlighting
- Prose styles for markdown content using shadcn color tokens
- Dark/light theme toggle with localStorage persistence
- Shiki everforest syntax themes for code blocks
- 404 page with VT323 font
- /docs redirect to installation page
- GitHub star count fetch
- Earthy green/cream oklch color palette matching TUI theme

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/public/install.ps1

@@ -1,85 +0,0 @@
-param(
-  [string]$Version = "latest"
-)
-
-$ErrorActionPreference = "Stop"
-
-function Resolve-Version {
-  param([string]$RequestedVersion)
-
-  if ($RequestedVersion -and $RequestedVersion -ne "latest") {
-    return $RequestedVersion.TrimStart("v")
-  }
-
-  $release = Invoke-RestMethod -Uri "https://api.github.com/repos/getcompanion-ai/feynman/releases/latest"
-  if (-not $release.tag_name) {
-    throw "Failed to resolve the latest Feynman release version."
-  }
-
-  return $release.tag_name.TrimStart("v")
-}
-
-function Get-ArchSuffix {
-  $arch = [System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture
-  switch ($arch.ToString()) {
-    "X64" { return "x64" }
-    "Arm64" { return "arm64" }
-    default { throw "Unsupported architecture: $arch" }
-  }
-}
-
-$resolvedVersion = Resolve-Version -RequestedVersion $Version
-$archSuffix = Get-ArchSuffix
-$bundleName = "feynman-$resolvedVersion-win32-$archSuffix"
-$archiveName = "$bundleName.zip"
-$baseUrl = if ($env:FEYNMAN_INSTALL_BASE_URL) { $env:FEYNMAN_INSTALL_BASE_URL } else { "https://github.com/getcompanion-ai/feynman/releases/download/v$resolvedVersion" }
-$downloadUrl = "$baseUrl/$archiveName"
-
-$installRoot = Join-Path $env:LOCALAPPDATA "Programs\feynman"
-$installBinDir = Join-Path $installRoot "bin"
-$bundleDir = Join-Path $installRoot $bundleName
-
-$tmpDir = Join-Path ([System.IO.Path]::GetTempPath()) ("feynman-install-" + [System.Guid]::NewGuid().ToString("N"))
-New-Item -ItemType Directory -Path $tmpDir | Out-Null
-
-try {
-  $archivePath = Join-Path $tmpDir $archiveName
-  Write-Host "==> Downloading $archiveName"
-  Invoke-WebRequest -Uri $downloadUrl -OutFile $archivePath
-
-  New-Item -ItemType Directory -Path $installRoot -Force | Out-Null
-  if (Test-Path $bundleDir) {
-    Remove-Item -Recurse -Force $bundleDir
-  }
-
-  Write-Host "==> Extracting $archiveName"
-  Expand-Archive -LiteralPath $archivePath -DestinationPath $installRoot -Force
-
-  New-Item -ItemType Directory -Path $installBinDir -Force | Out-Null
-
-  $shimPath = Join-Path $installBinDir "feynman.cmd"
-  Write-Host "==> Linking feynman into $installBinDir"
-  @"
-@echo off
-"$bundleDir\feynman.cmd" %*
-"@ | Set-Content -Path $shimPath -Encoding ASCII
-
-  $currentUserPath = [Environment]::GetEnvironmentVariable("Path", "User")
-  if (-not $currentUserPath.Split(';').Contains($installBinDir)) {
-    $updatedPath = if ([string]::IsNullOrWhiteSpace($currentUserPath)) {
-      $installBinDir
-    } else {
-      "$currentUserPath;$installBinDir"
-    }
-    [Environment]::SetEnvironmentVariable("Path", $updatedPath, "User")
-    Write-Host "Updated user PATH. Open a new shell to run feynman."
-  } else {
-    Write-Host "$installBinDir is already on PATH."
-  }
-
-  Write-Host "Feynman $resolvedVersion installed successfully."
-} finally {
-  if (Test-Path $tmpDir) {
-    Remove-Item -Recurse -Force $tmpDir
-  }
-}