Adjusts Commit Graph columns for narrow layouts

[sergeibbb]

Summary

Adjusts the Commit Graph's columns when the graph view is horizontally narrow: uses a compact graph column and hides the SHA and Changes columns so the limited horizontal space is used effectively. Closes #5500 (sub-issue of #5391).

The trigger is the graph's actual width, not where the details panel is pinned — so an explicit details-on-bottom pin on a wide editor is not treated as narrow, and a genuinely narrow graph gets the treatment regardless of the pin. Reuses the same width breakpoint (with hysteresis) already used for the auto details-location decision.

Behavior

• Narrow: graph column → compact mode, SHA and Changes columns hidden.
• Wide: columns render from the user's stored settings, unchanged.
• Not persisted: resizing/reordering a column while narrow strips the compact/hidden overrides before saving, so the user's wide-view preferences survive.
• Reactive: width changes apply/remove the overrides immediately, no reload.
• Column menus while narrow: the managed toggles (Show/Hide SHA, Show/Hide Changes, Compact/Expanded Graph Column) are disabled in the column header / settings-gear context menus, and reflect the effective (overridden) state rather than the stored one. A disabled info line — "Some Options Return When the Graph Is Wider" — explains why (VS Code menus don't support tooltips, so a disabled info item is the conventional substitute). Unmanaged toggles (author, date, message, ref) stay fully functional.

Implementation

• src/webviews/apps/plus/graph/graph-app.ts — isGraphViewNarrow getter, keyed off the width-driven _autoEffectiveLocation signal (decoupled from the details-panel pin); passed to the wrapper.
• src/webviews/apps/plus/graph/graph-wrapper/graph-wrapper.ts:
  • effectiveColumns — applies the narrow overrides, identity-cached to avoid prop churn on unrelated renders.
  • onColumnsChanged — strips the overrides before persisting.
  • effectiveGraphContext — rewrites the column-menu context tokens to the effective state and appends a columns:narrow token; identity-cached (the React engine ingests context by reference).
• contributions.json — enablement guards on the six managed column commands (keyed off columns:narrow) + a new disabled gitlens.graph.columnsNarrowInfo info-line command.
• package.json / src/constants.commands.generated.ts — regenerated from contributions.json.
• CHANGELOG.md — entry under Changed.

Test plan

Verified live via the vscode-inspector MCP, both engines (React and Lit):

• Narrow graph view (792px): graph column compact, SHA + Changes headers hidden, columns not persisted after resize, data-vscode-context carries columns:narrow + rewritten tokens.
• Wide graph page (1152px+): no overrides, no columns:narrow token, stored settings unaffected.
• Switching width reactively applies/removes overrides without a reload.
• pnpm run build (type-check + unit-test compile) passes clean.
• Manual: right-click the column header while narrow — confirm the managed items render grayed out and the info line appears (native VS Code context menu, not verifiable via DOM automation).

🤖 Generated with Claude Code

[sergeibbb]

Closing since it's already implemented in the new Graph engine