docs: both install paths (release package / clone) + Windows notes refreshed

The READMEs told users to clone the repository even though most just
want to run the app.  The Quick start now leads with the release
package (a snapshot of the tagged source: no git history, no
development files) and keeps the clone path for development or
unreleased changes; git is still required because setup installs pysim
from its upstream repository.

Windows notes refreshed against the actual tooling and PyPI:
- pyscard 2.3.1 ships cp39-cp313 wheels (no cp314) and requires
  Python >= 3.9, so the pip/pyproject floor is 3.9 now (3.8 could
  never install the dependency) and the "3.9 builds from source" note
  is gone - only 3.14 does.
- The reader sentence now describes what actually happens: start.sh
  asks for the first PC/SC reader when pcscd runs, the server
  auto-detects a PC/SC reader itself, and with none present pysim
  falls back to its serial default /dev/ttyUSB0 (use -d for a
  serial/FTDI reader).
- The manual-install block is marked Linux/macOS: on Windows pysim is
  installed via requirements-pysim.txt + --no-deps (setup.bat), since
  the plain pip route pulls the SMPP bridge and its MSVC chain.

Docs/metadata only: 953 frontend + 989 Python green.

README.md

@@ -15,13 +15,28 @@ SIMple is a workbench for UICC/SIM card specialists: an offline HTML/JS PWA plus
 
 **PWA only (client-side tools):** open `frontend/index.html` in any browser, or serve `frontend/` with any static server. No Python required.
 
-**Full (PWA + card server):**
+**Full (PWA + card server)** — two ways to get it:
+
+**1. Download the release package (recommended).** From the
+[Releases](https://github.com/anttro/simple/releases) page take the latest package
+(ZIP), unzip it anywhere and run the setup script once:
+
+```sh
+./setup.sh     # or setup.bat on Windows — creates .venv, installs pysim + server
+./start.sh     # or start.bat — starts the server (it serves the PWA too)
+```
+
+The package is built from the tagged source — no git history, no development files.
+Git is still required: `setup` installs **pysim** from its upstream repository
+(nothing from pysim or its dependencies is bundled).
+
+**2. Clone the repository (for development, or changes not released yet).**
 
 ```sh
 git clone https://github.com/anttro/simple.git
 cd simple
-./setup.sh     # or setup.bat on Windows — creates .venv, installs pysim + server
-./start.sh     # or start.bat — starts the server (it serves the PWA too)
+./setup.sh     # or setup.bat on Windows
+./start.sh     # or start.bat
 ```
 
 Then open http://127.0.0.1:8080 — the UI and API share one origin, so no CORS or browser-permission setup is needed. The server starts fine with an empty reader (no card is a normal state): insert a card and it is initialized automatically (auto-equip), or press **Equip card** in the UI.
@@ -723,29 +738,33 @@ The bundled Python server wraps [pySim](https://osmocom.org/projects/pysim/wiki)
 
 ### Prerequisites
 
-- **Python 3.8+** with `pip`, and **Git**
+- **Python 3.9+** with `pip`, and **Git**
 - **Smart card reader** (PC/SC or serial/FTDI) — PC/SC is preferable (`pcsc-lite` + `ccid` on Linux)
-- **Windows** — use Python 3.10–3.13 (3.13 recommended): `pyscard` ships precompiled wheels for these versions. On 3.9 / 3.14 it builds from source (needs MSVC C++ Build Tools). The SMPP bridge (`smpp.twisted3`) is intentionally skipped on Windows.
+- **Windows** — use Python 3.9–3.13 (3.13 recommended): `pyscard` ships precompiled wheels for these versions. On 3.14 it builds from source (needs MSVC C++ Build Tools). The SMPP bridge (`smpp.twisted3`) is intentionally skipped on Windows.
 
 ### Scripts
 
 | Script | What it does |
 |--------|-------------|
-| `setup.sh` / `setup.bat` | Creates `.venv/`, installs pysim and the server. Run once after cloning. |
+| `setup.sh` / `setup.bat` | Creates `.venv/`, installs pysim and the server. Run once after cloning or after unzipping the release package. |
 | `start.sh` / `start.bat` | Starts the server from the venv (serves the PWA + API on `:8080`). |
 
-`start.sh` auto-detects the reader (PC/SC if `pcscd` is running, else `/dev/ttyUSB0`); `start.bat` always uses `-p 0` (PC/SC is built into Windows). Extra arguments are passed through to the server, e.g. `./start.sh --gsmtap` or `start.bat --gsmtap 10.0.0.5:4729`. If no reader is found the server still starts ("Reader: none") — initialize the card later via the **Equip** button.
+`start.sh` asks for the first PC/SC reader when `pcscd` is running; otherwise the server still auto-detects a PC/SC reader itself, and with none present pysim falls back to its serial default `/dev/ttyUSB0` (pass `-d <device>` for a serial/FTDI reader). `start.bat` always passes `-p 0` (PC/SC is built into Windows). Extra arguments are passed through to the server, e.g. `./start.sh --gsmtap` or `start.bat --gsmtap 10.0.0.5:4729`. If no reader is found the server still starts ("Reader: none") — initialize the card later via the **Equip** button.
 
-### Manual installation
+### Manual installation (Linux/macOS)
 
 ```sh
 python3 -m venv .venv
-source .venv/bin/activate          # Linux/macOS   (Windows: .venv\Scripts\activate)
+source .venv/bin/activate
 pip install git+https://github.com/osmocom/pysim.git
 pip install -e .                   # editable — serves frontend/ from the source tree
 pysim-simple-server --http-port 8080
 ```
 
+On Windows use `setup.bat` instead: it installs pysim's dependencies from
+`requirements-pysim.txt` and pysim itself with `--no-deps`, so the SMPP bridge (and
+its MSVC build chain) is not pulled in.
+
 ### CLI options
 
 | Option | Description |