feat(reveal): add org-reveal presentation workflow with ERT tests

Replaced pandoc-based reveal.js export with native ox-reveal integration.
New org-reveal-config.el module provides offline, self-contained HTML export
with keybindings under C-; p. Includes setup script for reveal.js 5.1.0
and 34 ERT tests covering header template and title-to-filename helpers.

1 files changed, 71 insertions, 0 deletions

diff --git a/scripts/setup-reveal.sh b/scripts/setup-reveal.sh
new file mode 100755
index 00000000..c28e0a6c
--- /dev/null
+++ b/scripts/setup-reveal.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+# Setup reveal.js for org-reveal presentations (offline, pinned version)
+# Usage: setup-reveal.sh [--yes]   # --yes for non-interactive mode
+
+set -euo pipefail
+
+REVEAL_VERSION="5.1.0"
+REVEAL_DIR="$HOME/.emacs.d/reveal.js"
+
+# Non-interactive mode
+ASSUME_YES=false
+if [[ "${1:-}" == "--yes" ]] || [[ "${1:-}" == "-y" ]]; then
+  ASSUME_YES=true
+fi
+
+echo "=== reveal.js Setup for org-reveal ==="
+echo
+
+# Check if correct version already installed
+if [[ -d "$REVEAL_DIR" ]]; then
+  if [[ -f "$REVEAL_DIR/dist/reveal.js" ]]; then
+    INSTALLED_VERSION=$(cd "$REVEAL_DIR" && git describe --tags 2>/dev/null || echo "unknown")
+    if [[ "$INSTALLED_VERSION" == "$REVEAL_VERSION" ]]; then
+      echo "✓ reveal.js $REVEAL_VERSION already installed at $REVEAL_DIR"
+      exit 0
+    else
+      echo "Found reveal.js $INSTALLED_VERSION, need $REVEAL_VERSION"
+      if [[ "$ASSUME_YES" == false ]]; then
+        read -p "Replace with correct version? [Y/n] " -n 1 -r
+        echo
+        if [[ $REPLY =~ ^[Nn]$ ]]; then
+          echo "Aborted."
+          exit 1
+        fi
+      fi
+      echo "Removing old version..."
+      rm -rf "$REVEAL_DIR"
+    fi
+  else
+    echo "Found incomplete reveal.js directory, removing..."
+    rm -rf "$REVEAL_DIR"
+  fi
+fi
+
+# Clone reveal.js at pinned version (shallow clone for speed)
+echo "Step 1/2: Cloning reveal.js $REVEAL_VERSION..."
+git clone --depth 1 --branch "$REVEAL_VERSION" \
+  https://github.com/hakimel/reveal.js.git "$REVEAL_DIR"
+echo "✓ Cloned reveal.js $REVEAL_VERSION"
+
+# Verify installation
+echo
+echo "Step 2/2: Verifying installation..."
+if [[ -f "$REVEAL_DIR/dist/reveal.js" ]]; then
+  echo "✓ reveal.js $REVEAL_VERSION installed at $REVEAL_DIR"
+  echo
+  echo "=== Setup Complete! ==="
+  echo
+  echo "Usage in Emacs:"
+  echo "  C-; p n  Create new presentation"
+  echo "  C-; p e  Export to HTML and open"
+  echo "  C-; p p  Start live preview"
+else
+  echo "✗ Installation failed - dist/reveal.js not found"
+  echo
+  echo "Troubleshooting:"
+  echo "1. Check git access to github.com"
+  echo "2. Verify disk space at $REVEAL_DIR"
+  echo "3. Try manual clone: git clone https://github.com/hakimel/reveal.js.git $REVEAL_DIR"
+  exit 1
+fi