docs(16): record post-research decisions D-19..D-25

.planning/phases/16-grzybyfunkcjonalne-pl-on-reusable-blog-views/16-CONTEXT.md

@@ -10,7 +10,7 @@ grzybyfunkcjonalne.pl gets a new Nuxt frontend built the same way as `vue-summer
 
 The phase ends with the site **deploy-ready on staging** on the same server as the PHP site. The production nginx/DNS switch is a separate operational step after the phase.
 
-Out of scope: porting the Winter arsha/Twig theme or a Go server-side template engine; the menu, FAQ, sitemanager, blocks and sitemap plugin ports; the contact and newsletter forms; an English locale; changes to `sm-journal-plugin`'s API contract (Phase 15 D-14). `summercms.go` is touched only if a framework feature turns out to be missing.
+Out of scope: porting the Winter arsha/Twig theme or a Go server-side template engine; the menu, FAQ, sitemanager, blocks and sitemap plugin ports; the contact and newsletter forms; an English locale; changes to `sm-journal-plugin`'s API contract (Phase 15 D-14), except the author endpoint and category pillar content added by pre-execution quick tasks (D-20, D-21). `summercms.go` is touched only if a framework feature turns out to be missing.
 
 </domain>
 
@@ -45,6 +45,15 @@ Out of scope: porting the Winter arsha/Twig theme or a Go server-side template e
 - **D-17:** Content migration uses the Phase 15 **`journal:import-posts`** command fed by a PHP Journal export (the PHP repo already has `journal-export/*.json`), plus copying featured images and media into Go storage. Research must check that the export format matches the importer, and that slugs, authors, categories, tags, published dates and media references survive; it must flag gaps rather than patch over them.
 - **D-18:** **The phase stops at staging.** grzybyfunkcjonalne content runs end to end on staging (Go + Nuxt + imported posts) on the PHP site's server, with a smoke check that hits every old URL. The production switch is not a plan in this phase. Success criterion 1 counts as met once the site is served by SummerCMS on staging.
 
+### Decisions after research (2026-10-09, from 16-RESEARCH.md open questions)
+- **D-19:** **5 plans**: (1) `vue-journal-layer`, including the spike that installs it from the git tag, (2) `vue-grzybyfunkcjonalne-app` with the content port, (3) host config, migration tooling and deploy scripts, (4) staging deploy plus smoke check as a human checkpoint, (5) unit tests.
+- **D-20:** **Author API in the Journal plugin**, as a prerequisite. A `/msd-quick` task in `sm-journal-plugin` runs *before* Phase 16 execution and adds an anonymous author endpoint: an author slug plus the public profile fields the author page needs, and the author's posts. This supersedes the "no `sm-journal-plugin` API changes" boundary for this addition only. Phase 16 plans consume that endpoint for `/autor/:author` (D-05) and do not implement it. If the endpoint isn't there at execution start, the layer plan stops at a checkpoint. — **Reversibility:** costly — published API addition on a shared plugin.
+- **D-21:** **Category pillar content in the Journal plugin**, as a prerequisite. A `/msd-quick` or `/msd-fast` task in `sm-journal-plugin` runs *before* execution and adds a rich content field to Category, exposed in the admin form and in the categories API. Phase 16 renders it on `/:category` pages above the post list, and plan 3's migration fills it from the PHP database. No app-side pillar files.
+- **D-22:** **Featured images** come in through an **app-local Go command** in `sm-grzybyfunkcjonalne-app`. It reads a slug→file map produced by a SQL query on the PHP database and copies the files under their Winter disk names, so old image URLs keep resolving. It is idempotent and has unit tests.
+- **D-23:** **Google Analytics carries over**: tag `G-MLSV7WJ6W4`, set through Nuxt runtime config (`NUXT_PUBLIC_…`) so staging can leave it empty.
+- **D-24:** **`/amanita-muscaria` stays.** The layer always requests categories with `include_empty=1`, so an empty category renders 200 with its pillar content and an empty list.
+- **D-25:** **`pl` becomes the default locale before `journal:import-posts`** (RESEARCH key finding: the 62 live post URLs use Polish slugs). It is a scripted, ordered migration step that imports once into a fresh database (`--force` re-runs are unsafe after the switch).
+
 ### Claude's Discretion
 - Plan count and split, subject to the plan-count checkpoint and "unit tests are the last plan" (the layer gets Vitest or `node --test` tests, and app-local Go code gets Go tests).
 - How the layer exposes route configuration (`app.config`, runtime config or pages override) and token names.