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331bd4e3e5
Root cause of 'graph flashes on load then disappears' plus unbounded horizontal growth of the graph panel: fieldsets default to min-inline-size: min-content, so #graph-view-panel sized to its content, and the new ResizeObserver->setSize path closed a feedback loop (setSize -> slightly wider G6 canvas -> wider fieldset -> wider .dashboard flex column -> observer fires) that grew the page ~10px per frame and wiped the painted canvas on every step. Fix severs the feedback path: #graph-view-panel gets min-inline-size: 0, #graph-canvas gets overflow: hidden, and the page section gets flex: 1 1 0 with min-width: 0 so column widths are viewport-driven, never content-driven. This also fixes the original narrow-window scrollbars defect for real. The observer stays (guarded by a current-size comparison) because G6's autoResize is inert on this UMD build (verified: window resizes left the canvas size untouched); the inert autoResize flag is dropped. Legend items now join with spaces so the nowrap spans can wrap between entries. Also removes the header Expand button - the toolbar's expand/exit icons cover it, Esc still restores. Verified against the running devenv with a logged-in profile and variants_simple loaded: graph renders and persists, widths stable over multiple seconds at 1400px and 1000px viewports with no horizontal overflow, canvas follows both window shrink and grow, toolbar expand gives a full-page canvas and Esc restores. Signed-off-by: Álvaro Tejero Cantero <alvorithm@teje.ro>