Add news digest --no-push

Rebuilds the day's digest and its prose in place after a settings change,
without sending a second pointer for a day already pushed.

Deliberately a flag on the real command rather than a script beside it. A
tuning path that diverges from the production path is what made the old
system's replay harness worthless, and rebuilding today's digest by hand would
have been exactly that divergence.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015xPLgmcXCc9JjVwmQF63eM

news/cli.py

@@ -260,6 +260,14 @@ def cmd_digest(args) -> int:
         ntfy = NtfyConfig.from_env()
         base = ntfy.api_base or ""
         link = f"{base}/digest/{day}"
+        if args.no_push and not args.dry_run:
+            # Rebuild today's digest in place after a settings change, without
+            # sending a second pointer for a day already pushed. Deliberately
+            # the same code path as the scheduled run rather than a script
+            # beside it: a tuning path that diverges from the production path
+            # is what made the old system's replay harness worthless.
+            print(f"digest rebuilt, not pushed -> {link}")
+            return 0
         if args.dry_run:
             print(f"[dry-run] push: {title}\n{body}\n-> {link}")
             for i in items[:8]:
@@ -308,6 +316,8 @@ def main(argv: list[str] | None = None) -> int:
 
     p = sub.add_parser("digest", help="build the digest and push a pointer to it")
     p.add_argument("--dry-run", action="store_true")
+    p.add_argument("--no-push", action="store_true",
+                   help="rebuild the digest and its prose without sending ntfy")
     p.set_defaults(fn=cmd_digest)
 
     p = sub.add_parser("serve", help="run the web server")