v2.6.0

What changed

• The 10-minute chart range was removed (not a trading app)
• New 4-week chart range (deutsch: „4 Wochen", english: "4 weeks") with date labels
• Available ranges: 1 hr · 24 hrs · 4 days · 14 days · 4 weeks · All
• Minor layout fix so all six range buttons stay visible

Verification

• Unit tests, lint, release build successful
• Signed APK reproduces byte-for-byte from tag v2.6.0 (apksigcopier REPRO-OK)

Checksums

• APK SHA-256: b8ed588e96ebd0eaf4ccd604e760f46313be23c23f896f7385e1a6129e7447ff
• ZIP SHA-256: cb3f3afc04175ad507722e59ea05876ebaec0d4df59835afdcde57dd801d618e