Revert "Try to simplify none string logic"

This reverts commit c973ff4.

Author: ValerianRey

.github/actions/install-deps/action.yml

@@ -3,7 +3,7 @@ description: Install package dependencies using uv
 
 inputs:
   options:
-    description: 'Package options to install (space-separated, e.g., "full").'
+    description: 'Package options to install (space-separated, e.g., "full"). "none is an alias for empty string.'
     required: false
     default: 'full'
   groups:
@@ -17,12 +17,18 @@ runs:
     - name: Install dependencies (options=[${{ inputs.options }}], groups=[${{ inputs.groups }}])
       shell: bash
       run: |
+        # Handle "none" as alias for empty string
+        options_input="${{ inputs.options }}"
+        if [ "$options_input" = "none" ]; then
+          options_input=""
+        fi
+
         # Build the install command
         cmd="uv pip install -e"
 
         # Convert space-separated options to comma-separated for brackets
         # E.g. "abc def" => '.[abc,def]'
-        options=$(echo "${{ inputs.options }}" | tr ' ' ',')
+        options=$(echo "$options_input" | tr ' ' ',')
         cmd="$cmd '.[$options]'"
 
         # Add groups

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
   tests:
     # Default config: py3.14, ubuntu-latest, float32, full options.
     # The idea is to make each of those params vary one by one, to limit the number of tests to run.
-    name: Run tests (py${{ matrix.python-version || '3.14' }}, ${{ matrix.os || 'ubuntu-latest' }}, ${{ matrix.dtype || 'float32' }}, ${{ matrix.options == null && 'full' || matrix.options }})
+    name: Run tests (py${{ matrix.python-version || '3.14' }}, ${{ matrix.os || 'ubuntu-latest' }}, ${{ matrix.dtype || 'float32' }}, ${{ matrix.options || 'full' }})
     runs-on: ${{ matrix.os || 'ubuntu-latest' }}
     strategy:
       fail-fast: false
@@ -31,7 +31,7 @@ jobs:
           # dtype variations
           - dtype: float64
           # Installation options variations
-          - options: ''
+          - options: 'none'
 
     steps:
       - name: Checkout repository
@@ -44,7 +44,7 @@ jobs:
 
       - uses: ./.github/actions/install-deps
         with:
-          options: ${{ matrix.options == null && 'full' || matrix.options }}
+          options: ${{ matrix.options || 'full' }}
           groups: test
 
       - name: Run tests