Extract image_url from Pl@ntNet API response (medium size). Show thumbnail
in each match card on identify_confirm. On plant creation, download the
selected match's reference image and save as PlantPhoto thumbnail. Scan
photos saved as gallery photos (non-thumbnail) with fallback to first scan
photo as thumbnail when Pl@ntNet has no image.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Temp images uploaded during Pl@ntNet identification are now copied to
PlantPhoto records when the plant is created in step 3. First image is
auto-set as thumbnail. Temp files still deleted after transfer.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
