Paka 0.15.0 capture preview 1

First preview of 0.15.0, built on the released 0.14.0.

• Take document photos directly inside Paka when creating a photo pass: the capture goes sensor → memory → encrypted store, with no temporary file, media-store entry, or gallery thumbnail ever created
• Captures are re-encoded in memory before storage: sensor rotation baked in, size bounded, and all camera metadata (EXIF timestamps, device identifiers) stripped
• The capture screen matches the scanner: tap to focus, a manual light toggle, and a retake/use confirmation; screenshots are blocked while a document is in front of the camera
• Passes inside a stack can now be reordered from a pass's Details — a sort action next to the stack field opens the reorder screen scoped to that stack

Worth testing on the device: close-up focus on documents (IDs, cards), the light toggle in dim rooms, front/back two-shot flow, and in-stack sorting with stacks that have singles between their members.

Signed like the regular releases, so it installs as an update over an existing Paka installation (including earlier previews). Source is on the preview/document-capture branch; main remains at 0.14.0.