Drop the single-database split and re-baseline the control migrations

Every deployment has been through the per-blog split, so the code that
performed it (split.go, control migrations 00002–00007) is dead weight, and a
fresh install replaying six migrations only to drop the tables again was
silly. The control chain is now a single 00001_init.sql with the final users
and blogs shape, matching the blog chain.

Goose ignores versions recorded in the database that no longer exist in the
source, but refuses a future migration numbered below the database's highest
version. Databases that went through the split therefore need
`DELETE FROM goose_db_version WHERE version_id > 1` once; README and
AGENTS.md say so.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd8UPWrvyYCLj97JexNw3A

1 files changed, 0 insertions, 56 deletions

diff --git a/internal/db/migrations/control/00003_layout.sql b/internal/db/migrations/control/00003_layout.sql
deleted file mode 100644
index e8fff23..0000000
--- a/internal/db/migrations/control/00003_layout.sql
+++ /dev/null
@@ -1,56 +0,0 @@
--- +goose Up
--- Layout modules: what each area of a blog (header, columns, footer) shows.
-CREATE TABLE modules (
-    id          bigserial PRIMARY KEY,
-    blog_id     bigint NOT NULL REFERENCES blogs(id) ON DELETE CASCADE,
-    area        text NOT NULL CHECK (area IN ('header', 'left', 'right', 'above', 'below', 'footer')),
-    kind        text NOT NULL CHECK (kind IN ('title', 'logo', 'menu', 'archive', 'recent', 'html', 'rss', 'text', 'sitemap')),
-    title       text NOT NULL DEFAULT '',
-    body        text NOT NULL DEFAULT '',
-    count       integer NOT NULL DEFAULT 5,
-    sort_order  integer NOT NULL DEFAULT 0,
-    created_at  timestamptz NOT NULL DEFAULT now(),
-    updated_at  timestamptz NOT NULL DEFAULT now()
-);
-CREATE INDEX modules_blog ON modules (blog_id, area, sort_order, id);
-
--- The menu: blog pages and custom links in one ordered list.
-CREATE TABLE menu_items (
-    id          bigserial PRIMARY KEY,
-    blog_id     bigint NOT NULL REFERENCES blogs(id) ON DELETE CASCADE,
-    page_id     bigint REFERENCES pages(id) ON DELETE CASCADE,
-    label       text NOT NULL DEFAULT '',
-    url         text NOT NULL DEFAULT '',
-    sort_order  integer NOT NULL DEFAULT 0,
-    CHECK (page_id IS NOT NULL OR url <> '')
-);
-CREATE UNIQUE INDEX menu_items_page ON menu_items (page_id) WHERE page_id IS NOT NULL;
-CREATE INDEX menu_items_blog ON menu_items (blog_id, sort_order, id);
-
--- Existing blogs keep the menu they had: pages marked "show in menu", in menu
--- order, with the home page only if the theme included it.
-INSERT INTO menu_items (blog_id, page_id, sort_order)
-SELECT p.blog_id, p.id, row_number() OVER (PARTITION BY p.blog_id ORDER BY p.nav_order, p.id) - 1
-FROM pages p JOIN blogs b ON b.id = p.blog_id
-WHERE p.show_in_nav AND (NOT p.is_home OR coalesce((b.theme->>'nav_show_home')::boolean, true));
-ALTER TABLE pages DROP COLUMN show_in_nav;
-
--- ...and the layout their theme described.
-INSERT INTO modules (blog_id, area, kind, sort_order)
-SELECT id, 'header', 'title', CASE WHEN theme->>'nav_position' = 'top-bar' THEN 1 ELSE 0 END
-FROM blogs WHERE coalesce((theme->>'header_show_title')::boolean, true);
-INSERT INTO modules (blog_id, area, kind, sort_order)
-SELECT id, 'header', 'menu', CASE WHEN theme->>'nav_position' = 'top-bar' THEN 0 ELSE 1 END
-FROM blogs WHERE coalesce(theme->>'nav_position', 'below-header') <> 'left-sidebar';
-INSERT INTO modules (blog_id, area, kind, sort_order)
-SELECT id, 'left', 'menu', 0 FROM blogs WHERE theme->>'nav_position' = 'left-sidebar';
-INSERT INTO modules (blog_id, area, kind, body, sort_order)
-SELECT id, 'footer', 'text', theme->>'footer_text', 0 FROM blogs WHERE coalesce(theme->>'footer_text', '') <> '';
-INSERT INTO modules (blog_id, area, kind, sort_order)
-SELECT id, 'footer', 'rss', 1 FROM blogs WHERE coalesce((theme->>'footer_show_rss')::boolean, true);
-
--- +goose Down
-ALTER TABLE pages ADD COLUMN show_in_nav boolean NOT NULL DEFAULT true;
-UPDATE pages SET show_in_nav = EXISTS (SELECT 1 FROM menu_items m WHERE m.page_id = pages.id);
-DROP TABLE menu_items;
-DROP TABLE modules;