fix(editor): stop infinitely flashing find-widget button tooltips (#1077)

src/renderer/src/assets/main.css

@@ -896,6 +896,42 @@
   box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--warning, #f59e0b) 52%, transparent);
 }
 
+/* Why: Monaco's find-widget button tooltips (Close, Find in Selection, etc.)
+   render inside a `.context-view` wrapper → `.workbench-hover-container` →
+   `.workbench-hover.compact`, positioned above the target button. The wrapper's
+   bounding box (z-index 2576, `pointer-events: auto`) overlaps the button hit
+   area, so as the tooltip appears it fires `mouseleave` on the button → 200ms
+   debounce → hover disposes → mouse is again "over" the button → `mouseover`
+   re-fires a new tooltip → loop. The visible effect is an infinitely flashing
+   tooltip that also blocks clicks on the button beneath it. The overlap is
+   only reliably reproducible when the right sidebar is open, because the find
+   widget's x-position shifts the wrapper onto the button rect; with the
+   sidebar closed the wrapper often lands slightly offset and doesn't intercept.
+
+   These are compact tooltips (`HoverStyle.Pointer` → `.workbench-hover.compact`)
+   configured with `hideOnHover: true`, so the CompositeMouseTracker only tracks
+   the target element — not the wrapper. Making the entire wrapper chain
+   non-interactive breaks the overlap feedback loop without affecting tracker
+   logic, keyboard focus traps, or interactive markdown hovers (which are never
+   `.compact`). The `:has()` selector ensures we only disable pointer events on
+   context-views that actually contain a compact hover, leaving menus, dropdown
+   popups and other context-view consumers untouched. */
+.context-view:has(> .workbench-hover-container > .workbench-hover.compact),
+.workbench-hover-container:has(> .workbench-hover.compact) {
+  pointer-events: none;
+}
+
+/* Why: compact hovers for simple label strings (e.g. "Find in Selection (⌥⌘L)")
+   get `white-space: pre-wrap` inline-set by Monaco, so when the tooltip lands
+   near the viewport edge its max-width clamps and the label wraps to 2–3 lines,
+   pushing the tooltip down over the find-widget buttons. These labels are
+   single-line by design; forcing nowrap keeps the tooltip on one line and lets
+   the positioning logic flip/shift as needed to fit. Only applies to compact
+   hovers — markdown hovers still wrap normally. */
+.workbench-hover.compact .hover-contents {
+  white-space: nowrap !important;
+}
+
 /* ── Update card animations ───────────────────────────────────────── */
 
 @keyframes update-card-enter {