fix: smooth progress and rakuen refresh animations

[everpcpc]

Problem

Refreshing the progress and rakuen pages could feel hitchy because list updates were propagating too broadly. In progress, the parent list observed bulk query results, so a single subject update could invalidate the visible list. In both pages, refreshes were also driving animated list structure updates.

Approach

Move progress row observation down to a per-subject container so the parent list only manages ordering. Keep list updates on explicit withAnimation paths with row-level transitions, while removing the previous custom diff heuristic and letting SwiftUI handle the default animation behavior.

Scope

• add a per-subject progress container view to narrow SwiftData observation
• simplify progress list and tile parents so they only iterate subjectIds
• update shared page and rakuen list refresh paths to use direct animated state assignment
• bump the build version to 115

Validation

• make build-ci