Add README with usage, keybindings, and project context

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -0,0 +1,103 @@
+# mqv — Mail Queue Viewer
+
+A quick-and-dirty TUI for browsing the Postfix deferred queue, built mutt-style.
+
+I wanted this tool for a long time. Claude finally made it happen.
+
+
+## What it does
+
+`mqv` gives you a keyboard-driven terminal interface to inspect your Postfix mail queue — read messages, browse attachments, save EML files — without leaving the terminal.
+
+```
+  ABC1234     Mar 29 10:00   sender@example.com      Subject line here
+  DEF5678     Mar 28 14:32   other@example.com       Another message
+  ...
+```
+
+
+## Requirements
+
+- Go 1.21+
+- `postqueue` and `postcat` in `$PATH` (i.e. Postfix installed)
+- Run as a user with read access to the Postfix queue
+- Optional: `w3m` for rendering HTML parts as plain text
+
+
+## Install
+
+```bash
+git clone https://github.com/nemunaire/mqv
+cd mqv
+go build -o mqv .
+./mqv
+```
+
+Or install directly:
+
+```bash
+go install github.com/nemunaire/mqv@latest
+```
+
+## Screens & keybindings
+
+### Queue list
+
+| Key        | Action                              |
+|------------|-------------------------------------|
+| `↑` / `↓` | Navigate messages                   |
+| `Enter`    | Open message                        |
+| `r`        | Refresh queue                       |
+| `q`        | Quit                                |
+
+Subjects are fetched lazily in parallel via `postcat` as the list loads; a progress bar tracks completion.
+
+### Message view
+
+| Key             | Action                          |
+|-----------------|---------------------------------|
+| `↑↓` / `Space` / `PgUp` / `PgDn` | Scroll      |
+| `H`             | Toggle full headers / short headers |
+| `s`             | Save raw EML to `~/QUEUEID.eml` |
+| `v`             | Browse MIME parts               |
+| `q`             | Back to queue list              |
+
+Headers are RFC 2047 decoded. The body is decoded from quoted-printable or base64. HTML parts are rendered via `w3m` if available, otherwise shown as-is.
+
+### MIME parts browser
+
+| Key        | Action                              |
+|------------|-------------------------------------|
+| `↑↓` / `j/k` | Navigate parts                   |
+| `Enter`    | View text part inline               |
+| `s`        | Save part to file (prompts for name) |
+| `q` / `Esc`| Back to message view                |
+
+### Part view
+
+| Key             | Action              |
+|-----------------|---------------------|
+| `↑↓` / `Space` / `PgUp` / `PgDn` | Scroll  |
+| `q` / `Esc`     | Back to parts list  |
+
+
+## How it works
+
+1. Runs `postqueue -p` and parses the output to build the queue list.
+2. For each entry, fetches the subject via `postcat -qh MSGID` in parallel.
+3. On `Enter`, loads the full message with `postcat -qbh MSGID` and renders it in a scrollable viewport.
+4. MIME parsing is done in pure Go (`mime/multipart`, `mime/quotedprintable`) — no external dependencies for message decoding.
+5. Charset decoding handles ISO-8859-1, Windows-1252, and anything in the IANA index via `golang.org/x/text`.
+
+
+## Stack
+
+- [bubbletea](https://github.com/charmbracelet/bubbletea) — Elm-architecture TUI framework
+- [bubbles](https://github.com/charmbracelet/bubbles) — list, viewport, progress, textinput components
+- [lipgloss](https://github.com/charmbracelet/lipgloss) — terminal styling
+- [x/text](https://pkg.go.dev/golang.org/x/text) — charset decoding
+
+
+## License
+
+MIT