v0.5.15 — richer usage analytics + Neural Engine auto-recovery

Added — usage analytics phase 2 (opt-in, content-free)

The telemetry measured navigation but little about what the app is for. New shape-only events (sources, counts, kinds, codes, confidence bands — never text, titles, URLs, usernames, or community names), all behind Settings → Share usage analytics:

• post_opened {source, has_image, has_video, has_link, companions}
• vote {source, target, dir} — feed swipe, post, and comment
• comment_submitted {source, top_level}; post_created {source, kind, nsfw}
• subscribe {source, on}
• ai_verdict {index, confidence_bucket, trigger, surface} — deduped per item; raw probabilities never leave the device
• search_performed {scope, unified, sources, result_count, zero_results}
• community_twin_opened {from_source, twin_source, verified}
• merged_discussion_opened {source, companions, cross_network}

Also in this build

• Neural Engine auto-recovery (v0.5.14): the Core ML compile now self-heals on a bounded crash budget — no button, no re-download; gives up after 2 to avoid thrash.
• App version in Settings (v0.5.13).