Install into a fresh virtual environment; show both authors on PyPI

INSTALLATION.md

@@ -13,6 +13,30 @@ requires a Geant4 installation.
 
 ## Install a prebuilt wheel
 
+### Create a virtual environment first
+
+Always install into a fresh virtual environment. Installing into the system
+Python or conda's `base` environment mixes this package with whatever is already
+there (other Qt/PyQt, numpy or Geant4 builds), which is the most common cause of
+library mismatch errors. On recent Ubuntu/Debian, `pip install` outside a
+virtual environment is refused with `externally-managed-environment`.
+
+```bash
+python3 -m venv g4-env
+source g4-env/bin/activate
+python -m pip install --upgrade pip
+```
+
+or with conda:
+
+```bash
+conda create -n g4 python=3.12 -y
+conda activate g4
+```
+
+Activate the environment again in every new terminal. All commands below assume
+it is active.
+
 ### From PyPI
 
 ```bash

README.md

@@ -38,12 +38,29 @@ reach out to kavyavadhwa@gmail.com.
 ## Installation
 
 The package is published on
-[PyPI](https://pypi.org/project/geant4-python-application/):
+[PyPI](https://pypi.org/project/geant4-python-application/). Install it into a
+fresh virtual environment: mixing it with packages already in your system or
+base conda Python (other Qt/PyQt, numpy or Geant4 builds) is the most common
+cause of library mismatch errors.
 
 ```bash
+python3 -m venv g4-env
+source g4-env/bin/activate
+python -m pip install --upgrade pip
 pip install "geant4-python-application[gui]"
 ```
 
+With conda, create a new environment instead of using `base`:
+
+```bash
+conda create -n g4 python=3.12 -y
+conda activate g4
+pip install "geant4-python-application[gui]"
+```
+
+Activate the environment again (`source g4-env/bin/activate` or
+`conda activate g4`) in every new terminal before using the package.
+
 - Prebuilt wheels for macOS (Apple Silicon and Intel) and Linux x86_64, Python
   3.8–3.13. Geant4 is bundled, so no separate Geant4 (C++) installation is
   needed.

pyproject.toml

@@ -3,13 +3,14 @@ build-backend = "scikit_build_core.build"
 requires = ["scikit-build-core>=0.3.3", "pybind11"]
 
 [project]
+# Names only: PyPI shows just the first person when authors carry emails.
 authors = [
-    { name = "Luis Antonio Obis Aparicio", email = "luis.antonio.obis@gmail.com" },
-    { name = "Kavya Wadhwa", email = "kavyavadhwa@gmail.com" },
+    { name = "Luis Antonio Obis Aparicio" },
+    { name = "Kavya Wadhwa" },
 ]
 maintainers = [
-    { name = "Luis Antonio Obis Aparicio", email = "luis.antonio.obis@gmail.com" },
-    { name = "Kavya Wadhwa", email = "kavyavadhwa@gmail.com" },
+    { name = "Luis Antonio Obis Aparicio" },
+    { name = "Kavya Wadhwa" },
 ]
 classifiers = [
     "Intended Audience :: Developers",