feat(coding-agent): added self-update command with bundled templates

- Added `pi update` command for checking and installing CLI updates from GitHub releases or bun.
- Added cross-platform installer scripts (shell and PowerShell) with automatic PATH configuration.
- Changed HTML export to use compile-time bundled templates via Bun macros.
- Changed `exportToHtml` and `exportFromFile` functions to async operations.

scripts/install.ps1

@@ -0,0 +1,35 @@
+# Pi Coding Agent Installer for Windows
+# Usage: irm https://raw.githubusercontent.com/can1357/oh-my-pi/main/scripts/install.ps1 | iex
+
+$ErrorActionPreference = "Stop"
+
+$Repo = "can1357/oh-my-pi"
+$InstallDir = if ($env:PI_INSTALL_DIR) { $env:PI_INSTALL_DIR } else { "$env:LOCALAPPDATA\pi" }
+$Binary = "pi-windows-x64.exe"
+
+# Get latest release
+Write-Host "Fetching latest release..."
+$Release = Invoke-RestMethod -Uri "https://api.github.com/repos/$Repo/releases/latest"
+$Latest = $Release.tag_name
+Write-Host "Latest version: $Latest"
+
+# Download binary
+$Url = "https://github.com/$Repo/releases/download/$Latest/$Binary"
+Write-Host "Downloading $Binary..."
+
+New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null
+$OutPath = Join-Path $InstallDir "pi.exe"
+Invoke-WebRequest -Uri $Url -OutFile $OutPath
+
+Write-Host ""
+Write-Host "Installed pi to $OutPath"
+
+# Add to PATH if not already there
+$UserPath = [Environment]::GetEnvironmentVariable("Path", "User")
+if ($UserPath -notlike "*$InstallDir*") {
+    Write-Host "Adding $InstallDir to PATH..."
+    [Environment]::SetEnvironmentVariable("Path", "$UserPath;$InstallDir", "User")
+    Write-Host "Restart your terminal, then run 'pi' to get started!"
+} else {
+    Write-Host "Run 'pi' to get started!"
+}

scripts/install.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+set -e
+
+# Pi Coding Agent Installer
+# Usage: curl -fsSL https://raw.githubusercontent.com/can1357/oh-my-pi/main/scripts/install.sh | sh
+
+REPO="can1357/oh-my-pi"
+INSTALL_DIR="${PI_INSTALL_DIR:-$HOME/.local/bin}"
+
+# Detect platform
+OS="$(uname -s)"
+ARCH="$(uname -m)"
+
+case "$OS" in
+    Linux)  PLATFORM="linux" ;;
+    Darwin) PLATFORM="darwin" ;;
+    *)      echo "Unsupported OS: $OS"; exit 1 ;;
+esac
+
+case "$ARCH" in
+    x86_64|amd64)  ARCH="x64" ;;
+    arm64|aarch64) ARCH="arm64" ;;
+    *)             echo "Unsupported architecture: $ARCH"; exit 1 ;;
+esac
+
+BINARY="pi-${PLATFORM}-${ARCH}"
+
+# Get latest release tag
+echo "Fetching latest release..."
+LATEST=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/')
+if [ -z "$LATEST" ]; then
+    echo "Failed to fetch latest release"
+    exit 1
+fi
+echo "Latest version: $LATEST"
+
+# Download binary
+URL="https://github.com/${REPO}/releases/download/${LATEST}/${BINARY}"
+echo "Downloading ${BINARY}..."
+
+mkdir -p "$INSTALL_DIR"
+curl -fsSL "$URL" -o "${INSTALL_DIR}/pi"
+chmod +x "${INSTALL_DIR}/pi"
+
+echo ""
+echo "Installed pi to ${INSTALL_DIR}/pi"
+
+# Check if in PATH
+case ":$PATH:" in
+    *":$INSTALL_DIR:"*) echo "Run 'pi' to get started!" ;;
+    *) echo "Add ${INSTALL_DIR} to your PATH, then run 'pi'" ;;
+esac