feat: Add complete async audio transcription workflow

Implemented full transcription system with local Whisper and OpenAI API
support. Includes comprehensive test suite (60 tests) and reorganized
keybindings for better discoverability.

Features:
- Async transcription (non-blocking workflow)
- Desktop notifications (started/complete/error)
- Output: audio.txt (transcript) + audio.log (process logs)
- Modeline integration showing active transcription count
- Dired integration (press T on audio files)
- Process management and tracking

Scripts:
- install-whisper.sh: Install Whisper via AUR or pip
- uninstall-whisper.sh: Clean removal with cache cleanup
- local-whisper: Offline transcription using installed Whisper
- oai-transcribe: Cloud transcription via OpenAI API

Tests (60 passing):
- Audio file detection (16 tests)
- Path generation logic (11 tests)
- Log cleanup behavior (5 tests)
- Duration formatting (9 tests)
- Active counter & modeline (11 tests)
- Integration workflows (8 tests)

Keybindings:
- Reorganized gcal to C-; g submenu (s/t/r/c)
- Added C-; t transcription submenu (t/b/k)
- Dired: T to transcribe file at point

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

1 files changed, 103 insertions, 0 deletions

diff --git a/scripts/install-whisper.sh b/scripts/install-whisper.sh
new file mode 100755
index 00000000..e2ea4ac9
--- /dev/null
+++ b/scripts/install-whisper.sh
@@ -0,0 +1,103 @@
+#!/usr/bin/env bash
+# Install OpenAI Whisper for transcription on Arch Linux
+# Usage: install-whisper.sh [--yes]   # --yes for non-interactive mode
+
+set -euo pipefail
+
+# Non-interactive mode
+ASSUME_YES=false
+if [[ "${1:-}" == "--yes" ]] || [[ "${1:-}" == "-y" ]]; then
+  ASSUME_YES=true
+fi
+
+echo "=== Whisper Installation for Arch Linux ==="
+echo
+
+# Check if running on Arch
+if [[ ! -f /etc/arch-release ]]; then
+  echo "Warning: This script is designed for Arch Linux"
+  if [[ "$ASSUME_YES" == false ]]; then
+    read -p "Continue anyway? [y/N] " -n 1 -r
+    echo
+    [[ ! $REPLY =~ ^[Yy]$ ]] && exit 1
+  else
+    echo "Continuing anyway (--yes mode)"
+  fi
+fi
+
+# 1. Install system dependencies
+echo "Step 1/3: Installing system dependencies (ffmpeg)..."
+if ! command -v ffmpeg &> /dev/null; then
+  sudo pacman -S --needed ffmpeg
+  echo "✓ ffmpeg installed"
+else
+  echo "✓ ffmpeg already installed"
+fi
+
+# 2. Check for AUR package first (optional but cleaner)
+echo
+echo "Step 2/3: Checking for AUR package..."
+AUR_INSTALLED=false
+
+if command -v yay &> /dev/null; then
+  echo "Found yay. Checking AUR for python-openai-whisper..."
+  if yay -Ss python-openai-whisper | grep -q 'python-openai-whisper'; then
+    INSTALL_AUR=false
+    if [[ "$ASSUME_YES" == true ]]; then
+      echo "Installing from AUR (--yes mode)"
+      INSTALL_AUR=true
+    else
+      read -p "Install from AUR via yay? [Y/n] " -n 1 -r
+      echo
+      if [[ $REPLY =~ ^[Yy]$ ]] || [[ -z $REPLY ]]; then
+        INSTALL_AUR=true
+      fi
+    fi
+
+    if [[ "$INSTALL_AUR" == true ]]; then
+      yay -S --needed --noconfirm python-openai-whisper
+      echo "✓ Installed from AUR"
+      AUR_INSTALLED=true
+    fi
+  else
+    echo "Package python-openai-whisper not found in AUR"
+  fi
+else
+  echo "yay not found. Skipping AUR installation."
+  echo "(Install yay if you prefer AUR packages)"
+fi
+
+# 3. Install via pip if not from AUR
+if [[ "$AUR_INSTALLED" == false ]]; then
+  echo
+  echo "Step 3/3: Installing openai-whisper via pip..."
+  pip install --user -U openai-whisper
+  echo "✓ openai-whisper installed via pip"
+  echo
+  echo "Note: Ensure ~/.local/bin is in your PATH"
+  echo "Add to ~/.bashrc or ~/.zshrc: export PATH=\"\$HOME/.local/bin:\$PATH\""
+fi
+
+# Verify installation
+echo
+echo "=== Verifying Installation ==="
+if command -v whisper &> /dev/null; then
+  echo "✓ whisper command found at: $(which whisper)"
+  whisper --help | head -n 3
+  echo
+  echo "=== Installation Complete! ==="
+  echo
+  echo "Models available: tiny, base, small, medium, large"
+  echo "Recommended: small (good balance of speed/accuracy)"
+  echo "Model will download automatically on first use."
+  echo
+  echo "Test with: whisper your-audio.m4a --model small --language en"
+else
+  echo "✗ Installation failed - whisper command not found"
+  echo
+  echo "Troubleshooting:"
+  echo "1. Ensure ~/.local/bin is in your PATH"
+  echo "2. Run: source ~/.bashrc (or ~/.zshrc)"
+  echo "3. Try: python -m whisper --help"
+  exit 1
+fi