lib: banner purge + WHY-only comment sweep (rule 8)

Every // ---- section banner dies (132 -> 0): names carry the WHAT.
Narration deleted (filename restatements, run-with lines, what-the-
next-line-does); every ref/hare cite, task cite, divergence, ABI/
layout contract, and ownership qualifier kept (borrowed-view lines
restored where the sweep over-cut). Comment-only proven: all 442
walk-workdir .s and 32 import-probe .s byte-identical before/after;
libbyteid 56-roster all-ID.

lib/fnmatch/fnmatch.ww

@@ -2,12 +2,6 @@
 // fnmatch:: (ref/hare/fnmatch/fnmatch.ha) using ww byte-indexed
 // cursors in place of Hare's strings::iterator.
 //
-// Surface today:
-//
-//   fnmatch.flag           — enum i32 bitmask (NONE / PATHNAME /
-//                            NOESCAPE / PERIOD)
-//   fnmatch.fnmatch(pattern: str, string: str, flags: flag) bool
-//
 // Matching rules (Hare-spec):
 //
 //   - '?'          matches any single byte
@@ -328,7 +322,6 @@ fn fnmatch_internal(pattern: str, string: str, fl: flag) (bool | invalid) = {
 	let pp: i32 = 0;
 	let sp: i32 = 0;
 
-	// ---- prefix: match up to the first '*' ----------------------
 	let sawstar: bool = false;
 	for (!sawstar) {
 		let scur: i32 = sp;
@@ -361,7 +354,6 @@ fn fnmatch_internal(pattern: str, string: str, fl: flag) (bool | invalid) = {
 		if (advance) { sp = scur; };
 	};
 
-	// ---- find the tail (token count after the last '*') ---------
 	let pp_copy: i32 = pp;
 	let pp_last: i32 = pp;
 	let pp_last_cnt: i32 = 0;
@@ -398,7 +390,6 @@ fn fnmatch_internal(pattern: str, string: str, fl: flag) (bool | invalid) = {
 	let tail_pos: i32 = string.len - tail_cnt;
 	if (tail_pos < sp_copy) { return false; };
 
-	// ---- tail: match (from pp) against string[tail_pos..] -------
 	let ts: i32 = tail_pos;
 	let tdone: bool = false;
 	for (!tdone) {
@@ -439,7 +430,6 @@ fn fnmatch_internal(pattern: str, string: str, fl: flag) (bool | invalid) = {
 		};
 	};
 
-	// ---- middle: greedy match of each star-delimited subpattern --
 	let mid_pat: str;
 	mid_pat.ptr = pattern.ptr + (pp_copy: u64);
 	mid_pat.len = pp_last - pp_copy;
@@ -525,7 +515,6 @@ fn fnmatch_pathname(pattern: str, string: str, fl: flag) (bool | invalid) = {
 	let final: bool = false;
 	for (!final) {
 		segstart_pat = pp;
-		// Walk pattern until the next '/' (segment break) or end.
 		let inner: bool = true;
 		let kind: i32 = 0;	// 0 = saw '/', 1 = saw end
 		for (inner) {