ELLOS DESKTOP PRO REBUILD CORE V21H1 - TEXT + PDF SAFE

Ti mpike:
- Text source me pliktrologisi apo to app
- Inspector controls gia text (content, size, align, colors, bg opacity, bold)
- PDF intake lite me safe placeholder preview sto layer
- Double click sto PDF apo library anoigei to arxeio
- Kratithike to V21G1 fix: otan allazeis media apo inspector, den xanachanetai i playlist tou layer

Ti den peiraxthike:
- playback core
- mapping
- P1/P2/P3/P4/P5
- stable renderer logic

Simeiosi:
To PDF einai safe/lite support. Den peirazei ton pyrina render kai deixnei placeholder page sto stage/layer preview.
