Add gnommo.sh wrapper and fix slide/scaling issues

gnommo.sh:
- Bash wrapper for easy CLI usage
- Commands: validate, transcribe, align, render, all
- `gnommo.sh -p video1 all` runs full pipeline

Slide scaling:
- Slides now scale to full frame (1920x1080)
- Transparent areas show through to layers below
- Positioned at 0,0 for full overlay

targetheight percentage:
- Supports percentage values like "100%"
- Calculates actual height from frame resolution
- "100%" on 1080p = 1080px height

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

gnommo.sh

@@ -0,0 +1,157 @@
+#!/bin/bash
+#
+# GnommoEditor - Code-first video editing pipeline
+#
+# Usage:
+#   gnommo.sh -p <project>              Render project
+#   gnommo.sh -p <project> validate     Validate only
+#   gnommo.sh -p <project> transcribe   Transcribe video
+#   gnommo.sh -p <project> align        Align markers to transcript
+#   gnommo.sh -p <project> all          Full pipeline: transcribe → align → render
+#
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+VENV_PYTHON="$SCRIPT_DIR/venv/bin/python"
+
+# Check for venv
+if [[ ! -f "$VENV_PYTHON" ]]; then
+    echo "Error: Virtual environment not found at $SCRIPT_DIR/venv"
+    echo "Create it with: python -m venv venv && ./venv/bin/pip install openai-whisper"
+    exit 1
+fi
+
+# Parse arguments
+PROJECT=""
+COMMAND="render"
+VERBOSE=""
+
+usage() {
+    echo "Usage: gnommo.sh -p <project> [command] [options]"
+    echo ""
+    echo "Commands:"
+    echo "  render      Render video (default)"
+    echo "  validate    Validate project only"
+    echo "  transcribe  Transcribe video audio"
+    echo "  align       Align manuscript to transcript"
+    echo "  all         Full pipeline: transcribe → align → render"
+    echo ""
+    echo "Options:"
+    echo "  -p <dir>    Project directory (required)"
+    echo "  -v          Verbose output"
+    echo "  -h          Show this help"
+    echo ""
+    echo "Examples:"
+    echo "  gnommo.sh -p video1              # Render video1 project"
+    echo "  gnommo.sh -p video1 validate     # Validate only"
+    echo "  gnommo.sh -p video1 all          # Full pipeline"
+    exit 0
+}
+
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        -p|--project)
+            PROJECT="$2"
+            shift 2
+            ;;
+        -v|--verbose)
+            VERBOSE="--verbose"
+            shift
+            ;;
+        -h|--help)
+            usage
+            ;;
+        validate|render|transcribe|align|all)
+            COMMAND="$1"
+            shift
+            ;;
+        *)
+            echo "Unknown option: $1"
+            usage
+            ;;
+    esac
+done
+
+# Validate project argument
+if [[ -z "$PROJECT" ]]; then
+    echo "Error: Project directory required (-p <project>)"
+    echo ""
+    usage
+fi
+
+if [[ ! -d "$PROJECT" ]]; then
+    echo "Error: Project directory not found: $PROJECT"
+    exit 1
+fi
+
+if [[ ! -f "$PROJECT/project.json" ]]; then
+    echo "Error: project.json not found in $PROJECT"
+    exit 1
+fi
+
+# Run commands
+run_gnommo() {
+    "$VENV_PYTHON" -m gnommo "$@"
+}
+
+case $COMMAND in
+    validate)
+        echo "=== Validating $PROJECT ==="
+        run_gnommo validate "$PROJECT"
+        ;;
+
+    transcribe)
+        echo "=== Transcribing $PROJECT ==="
+        VIDEO=$(find "$PROJECT/media" -name "*.mov" -o -name "*.mp4" | head -1)
+        if [[ -z "$VIDEO" ]]; then
+            echo "Error: No video file found in $PROJECT/media/"
+            exit 1
+        fi
+        run_gnommo transcribe "$VIDEO"
+        ;;
+
+    align)
+        echo "=== Aligning $PROJECT ==="
+        run_gnommo align "$PROJECT"
+        ;;
+
+    render)
+        echo "=== Rendering $PROJECT ==="
+        run_gnommo render "$PROJECT" $VERBOSE
+        ;;
+
+    all)
+        echo "=== Full Pipeline: $PROJECT ==="
+        echo ""
+
+        # Step 1: Transcribe
+        echo ">>> Step 1/3: Transcribe"
+        VIDEO=$(find "$PROJECT/media" -name "*.mov" -o -name "*.mp4" | grep -v transcript | head -1)
+        if [[ -z "$VIDEO" ]]; then
+            echo "Error: No video file found in $PROJECT/media/"
+            exit 1
+        fi
+        TRANSCRIPT="${VIDEO%.*}.transcript.json"
+        if [[ -f "$TRANSCRIPT" ]]; then
+            echo "    Transcript exists, skipping: $TRANSCRIPT"
+        else
+            run_gnommo transcribe "$VIDEO"
+        fi
+        echo ""
+
+        # Step 2: Align
+        echo ">>> Step 2/3: Align"
+        run_gnommo align "$PROJECT"
+        echo ""
+
+        # Step 3: Render
+        echo ">>> Step 3/3: Render"
+        run_gnommo render "$PROJECT" $VERBOSE
+        ;;
+
+    *)
+        echo "Unknown command: $COMMAND"
+        usage
+        ;;
+esac