Cleanup: Remove dead StaticsMap code after server v0.8.0 fingerprint refactor

[adnaan]

Summary

The server-side fingerprint-based refactor (livetemplate/livetemplate#86) eliminates the need for StaticsMap (sm) support in the client. Heterogeneous ranges (items with different templates) now use full replacement instead of per-item statics lookup.

This issue tracks the cleanup of ~35-50 lines of dead code that can be safely removed.

Background

Server Change: The server now uses structure fingerprints to determine when to send statics, replacing the complex registry-based path tracking. For heterogeneous ranges, instead of sending StaticsMap with per-item statics, the server sends a full tree replacement.

Client Impact: The StaticsMap (sm) field and _sk (statics key) handling code will never execute but won't cause errors. This is safe to remove for cleaner code.

Dead Code to Remove

1. RangeStateEntry.staticsMap field

File: state/tree-renderer.ts (line 7)

// Remove this field
interface RangeStateEntry {
  items: any[];
  statics: any[];
  staticsMap?: Record<string, string[]>;  // ← REMOVE
}

2. sm destructuring and storage

File: state/tree-renderer.ts

Line	Code	Action
225	staticsMap: rangeStructure.sm,	Remove
358	staticsMap: rangeStructure.sm,	Remove
421	staticsMap: value.sm,	Remove
493	const { d: dynamics, s: statics, sm: staticsMap } = rangeNode;	Simplify
675	staticsMap: rangeData.staticsMap,	Remove
681	sm: rangeData.staticsMap,	Remove
702	sm: this.rangeState[stateKey].staticsMap,	Remove

3. hasStaticsMap and _sk lookup logic

File: state/tree-renderer.ts

// Lines 509, 516-518 - REMOVE this block
const hasStaticsMap = staticsMap && typeof staticsMap === "object";

if (statics && Array.isArray(statics)) {
  return dynamics.map((item: any, itemIdx: number) => {
    let itemStatics = statics;
    // REMOVE: This block is now dead code
    if (hasStaticsMap && item._sk && staticsMap[item._sk]) {
      itemStatics = staticsMap[item._sk];
    }
    // ... rest stays
  });
}

// Lines 728-735 - REMOVE staticsMap parameter and _sk lookup
private renderItemsWithStatics(
  items: any[],
  statics: string[],
  staticsMap?: Record<string, string[]>,  // ← REMOVE parameter
  statePath?: string
): string {
  // REMOVE: This check is now dead code
  if (
    staticsMap &&
    typeof staticsMap === "object" &&
    item._sk &&
    staticsMap[item._sk]
  ) {
    itemStatics = staticsMap[item._sk];
  }
}

Verification

Before removing this code, verify:

1. Server v0.8.0 is released and stable
2. No sm fields appear in WebSocket messages (can check via browser dev tools)
3. All existing tests pass after removal
4. E2E tests in lvt repository pass

Estimated Impact

• Lines removed: ~35-50
• Risk: Low (dead code removal)
• Breaking changes: None (internal implementation detail)

Related

• Server PR: Analyze template parsing architecture for refactoring livetemplate#86
• Server docs: docs/SIMPLIFIED_DIFF_PROPOSAL.md → "Client Compatibility Analysis" section