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* feat(issues): add thread quick-jump minimap to issue detail (MUL-4389) A Linear-style rail of tick marks overlaid on the left edge of the issue detail scroll area, one tick per comment thread (folded resolved bars included). Ticks whose thread intersects the viewport render darker, so the rail doubles as a scroll minimap. Hovering a tick grows it and opens a preview card (bold first line + muted body excerpt, both clamped); clicking jumps the timeline to the thread and flashes it like an inbox deep-link landing. Jumps go through Virtuoso's scrollToIndex in virtualized mode (the target row may be unmounted) and direct container scrollTop math in the flat deep-link/find modes, never native scrollIntoView (#3929). Viewport tracking reads DOM rects on scroll/resize instead of an IntersectionObserver because Virtuoso mounts/unmounts rows while scrolling. Hidden on mobile: no hover, and the gutter is too tight. Co-authored-by: multica-agent <github@multica.ai> * feat(issues): Dock-style hover wave on the thread minimap (MUL-4389) Hovering the rail now magnifies ticks with a cosine falloff of their distance to the cursor — the hovered tick peaks at 1.7x and neighbours taper off across ~4 tick pitches, following the pointer continuously. Driven per-pointermove with direct style writes on the native `scale` property (compositor-friendly, no React re-render), batched read-then-write inside one rAF; a 100ms ease-out transition smooths between pointer samples and settles the collapse on leave. Clearing the inline value hands control back to the CSS floor states (popup-open, focus-visible), and prefers-reduced-motion swaps the wave for a plain hover grow. Only the hovered tick darkens — neighbours grow but keep their color. Co-authored-by: multica-agent <github@multica.ai> * feat(issues): single glide-follow preview card on the thread minimap (MUL-4389) Scanning the rail continuously re-paid the 150ms open delay plus the close/open animation on every tick crossed, because each tick owned an independent PreviewCard popover — hover felt laggy while gliding. Replace the per-tick popovers with ONE card owned by the rail, driven by the same rAF rect pass as the hover wave: the intent delay is paid once when the pointer enters the rail; after that, gliding retargets the card instantly (~1 frame) and slides it to the hovered tick with a 150ms transform transition. Leaving starts a grace timer long enough to travel onto the card (which keeps it open for text selection); keyboard focus anchors the card immediately. The anchor is clamped so the card never sticks out of the column at the rail's extremes, and previews are cached per thread content so unrelated timeline updates don't re-flatten every comment. Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai>