v0.6.0 — content-replace + blocks-patch footgun guard

New: gds/content-replace

Literal find-and-replace across all blocks of a post (or many posts) in one safe, counted pass — the right tool when changing a word/phrase that appears in more than one place, instead of hand-patching each block via gds/blocks-patch.

• whole_word (Unicode-aware) + case_sensitive toggles — ilman won't match inside ilmanvaihto or Vilman.
• Tag-safe: only rewrites visible text nodes, never tag internals (href/src/class). include_attrs opts into attribute values for blocks that store text there.
• dry_run: match count + context samples without writing.
• expect_count: aborts without writing when the real count differs — "replace 4" can't silently become 14.
• ids[]: same replacement across many posts in one call (plan-then-apply, combined count, single bulk undo) for site-wide sweeps (e.g. an old email address). Pair with gds/content-list.
• Fully reversible.

Fixes

• blocks-patch footgun guard: occurrence: 0 combined with inner_html/inner_blocks is now rejected (it would broadcast identical content to every matching block — the page-nuking case). occurrence: 0 + attrs stays allowed.
• wp_slash() before wp_update_post() in both content-replace and blocks-patch — block content with backslashes (code blocks, Windows paths, escapes) was silently corrupted on save.

Internal

• Extracted the template-aware post-id resolver into a shared ResolvesPostId trait.

Full suite green (392 tests), Pint + PHPStan level 6 clean. See #28.