Add current-draft diagnostic underlines and passive hover

Preserve raw include diagnostic provenance and derive bands from the existing shaped editor. Retain deferred tooltip paragraphs through rendering. Include source, regression, failure and native-trial evidence; corrected native acceptance remains pending.

harness/experiments/text-diagnostics-20260913/probe/capture_inputs.py

@@ -0,0 +1,12 @@
+"""Read-only complete probe input capture; creates only the named fresh receipt."""
+from pathlib import Path
+import argparse,datetime,hashlib,json
+p=argparse.ArgumentParser();p.add_argument('--output',required=True);a=p.parse_args()
+b=Path(__file__).resolve().parent;o=Path(a.output).resolve();assert not o.exists()
+rows=[]
+for f in sorted(b.rglob('*')):
+ if not f.is_file() or f.resolve()==o or f.relative_to(b).parts[0] in ('records','target'):continue
+ raw=f.read_bytes();rows.append(dict(path=f.relative_to(b).as_posix(),bytes=len(raw),sha256=hashlib.sha256(raw).hexdigest()))
+o.parent.mkdir(parents=True,exist_ok=True)
+with o.open('x',encoding='utf-8',newline='\n') as s:json.dump(dict(atUtc=datetime.datetime.now(datetime.timezone.utc).isoformat(),scope='Input bytes only; no Cargo or probe execution',lockfilePresent=(b/'Cargo.lock').is_file(),files=rows),s,indent=2);s.write('\n')
+print(json.dumps(dict(path=str(o),files=len(rows),sha256=hashlib.sha256(o.read_bytes()).hexdigest())))