This is the piece that I find interesting. This information is also included in the DailyMail graphic.
"The sector envisaged for his hike extends from the port of Glère to the port of Vénasque (French and Spanish sides)."
Pyrénées. Neuf jours après son dernier message, aucune trace de la randonneuse disparue en Haute-Garonne
Did she intend to hike from the Pic de Sauvgarde to the Port de Glère, bivouac nearby Nov 22? Maybe the plan was to hike to the Lac de la Montagnette, bivouac Nov 23, then hike to Refuge de Venasque, overnight Nov 24, then return to Spain Nov 25?
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Arrows crudely identify a path from Port de Glère to the Refuge de Venasque.
Everything we know fits - she was at the summit, she took and sent the photo at 4PM, she was going to overnight at the refuge, but her route was from Pic de Sauvegarde to the Port de Glère to the Refuge de Venasque to the Port de Venasque and back to the van.