Miguel Palhas
b11784e8e3
Three more fixes from acceptance review: - structured.ts's header omitted the .sessions-btn attach.ts's terminal header carries. The sidebar is off-canvas on mobile, so a structured session had no way to reach it — add the same button and requestToggleDrawer wiring. - ConnectionPool.reconcileViews always remounted a repaired connection with focus:false. If the mistyped pane was the one actually focused, disposing it dropped DOM focus while `focusedId` still named it. Pass `focus: this.focusedId === id` instead — `focusedId` only ever names a real focus (multiview.ts skips setFocus while previewing), so a preview or a merely-visible split neighbour still comes back unfocused. - onMount's deferred requestAnimationFrame focus had no way to tell it had been superseded by an unmount (or a remount elsewhere) before it fired, so a parked pane could steal focus a frame later. A token bumped on every mount/unmount lets the callback recognize it's stale and no-op. Regression tests: 7 new (structured.test.ts, connections.test.ts). 495 tests total.