Audit remaining tools/ TypeScript files (#225 Phase 2)

[kui]

Summary

Phase 2 for #225: audit all remaining tools/ TypeScript files in one sweep (17 files, 109 flagged comments). Drops the corresponding 17 entries from EXCLUDED_PATHS.

Coverage

File	Violations	Treatment summary
tools/lib/symbol-chars.ts	19	File-top preambles + trailing range labels folded into JSDoc tables on SYMBOL_RANGES and EXTRA_CODE_POINTS
tools/lib/ico.ts	12	Trailing field-offset labels replaced by a single JSDoc struct table on buildIco
tools/generate-prefab-properties-jsons.ts	12	Function preambles → JSDoc on extractMeshSizes, parseYOffset, extractDensityScores, extractDistrictColors; one in-body WHY: on the zero-footprint skip
tools/generate-font-subsets.ts	11	Job-config preamble → JSDoc on JOBS; in-array note reshaped as one-line WHY:; countGlyphs preamble → JSDoc
tools/generate-glyph-markers.ts	9	Field notes and marker-job preamble → JSDoc; in-array notes reshaped as one-line WHY: each
tools/extract-added-prefabs.ts	8	9-line VERSIONS preamble folded into JSDoc on the const
tools/lib/utils.ts	8	Three function preambles → JSDoc on vanillaDir, compactStringify, collapseLeafArrays
tools/verify-steel-wrench-filter.ts	7	Four filter-condition notes rewritten as single-clause WHY: each; two section markers (// Compare etc.) deleted
tools/lib/prefab-files.ts	6	Suffix-order note reshaped as INVARIANT: on PREFAB_SUFFIXES; ignored-XML predicate note → JSDoc
tools/bench-prefab-filter.ts	4	File-top summary → JSDoc block; structuredClone rationale → one-line WHY:
tools/copy-map-files.ts	3	WORLD_CONCURRENCY preamble → JSDoc
tools/build.ts	3	// Keep alive deleted; serve-static regression note (issue #202) kept as one-line WHY:
tools/print-png-pixel-stat.ts	2	Two-line packing rationale → single-line WHY:
tools/generate-labels-jsons.ts	2	Two-line pre-grouping rationale → single-line WHY:
tools/print-tts.ts	1	Section marker deleted
tools/generate-prefab-html.ts	1	// No jpg in ENOENT branch deleted
tools/generate-favicon.ts	1	One-line comment converted to inline JSDoc on SIZES

Style

All new markers are single-clause sentences (or period-split two-sentence) with because / so / since for causation. No ;, —, colon-elaboration, or parenthetical elaboration on prose per the memo established in #235 / #236 review.

tools/lib/prefab-html.ts, tools/lib/xmls/* and the binary parsers were audited in earlier PRs (#238, #235, #239).

Test plan

• deno task ci:lint passes
• deno task ci:fmt-check passes
• deno task ci:type-check passes
• deno task test — 41 tests / 241 steps pass

Progress

EXCLUDED_PATHS: 65 → 48. tools/ is now fully audited.