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, 60 insertions, 0 deletions

diff --git a/scripts/local-whisper b/scripts/local-whisper
new file mode 100755
index 00000000..b08651c9
--- /dev/null
+++ b/scripts/local-whisper
@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+# local-whisper - Transcribe audio files using locally installed Whisper
+# Usage: local-whisper <audio-file> [model] [language]
+#
+# Models: tiny, base, small, medium, large (default: small)
+# Language: en, es, fr, etc. (default: en)
+
+set -euo pipefail
+
+# Parse arguments
+AUDIO="${1:-}"
+MODEL="${2:-small}"
+LANG="${3:-en}"
+
+# Validate arguments
+if [[ -z "$AUDIO" ]]; then
+  echo "Usage: local-whisper <audio-file> [model] [language]" >&2
+  echo "Example: local-whisper meeting.m4a small en" >&2
+  exit 1
+fi
+
+if [[ ! -f "$AUDIO" ]]; then
+  echo "Error: Audio file not found: $AUDIO" >&2
+  exit 1
+fi
+
+# Check whisper is installed
+if ! command -v whisper &> /dev/null; then
+  echo "Error: whisper command not found" >&2
+  echo "Install with: ~/.emacs.d/scripts/install-whisper.sh" >&2
+  exit 1
+fi
+
+# Get absolute path to audio file
+AUDIO_ABS="$(realpath "$AUDIO")"
+AUDIO_DIR="$(dirname "$AUDIO_ABS")"
+AUDIO_BASE="$(basename "$AUDIO_ABS")"
+AUDIO_NAME="${AUDIO_BASE%.*}"
+
+# Run whisper
+# Note: whisper creates ${AUDIO_NAME}.txt automatically in the output directory
+whisper "$AUDIO_ABS" \
+  --model "$MODEL" \
+  --language "$LANG" \
+  --task transcribe \
+  --output_format txt \
+  --output_dir "$AUDIO_DIR" \
+  --verbose False 2>&1
+
+# Output file that whisper creates
+OUTPUT_FILE="$AUDIO_DIR/$AUDIO_NAME.txt"
+
+# Return transcript to stdout
+if [[ -f "$OUTPUT_FILE" ]]; then
+  cat "$OUTPUT_FILE"
+  exit 0
+else
+  echo "Error: Whisper did not create expected output file: $OUTPUT_FILE" >&2
+  exit 1
+fi