The first slice of the Submission generator v2 ("Composer") per the
design at docs/design-submission-generator-v2-2026-05-26.md §12 Slice A.
Ships the base concept + per-draft section seeding end-to-end with NO
change to the .docx render path — v1 export still works exactly as
today.
Schema (mig 146/147/148):
- paliad.submission_bases — catalog table; one row per template base
(slug, firm, proceeding_family, label_de/en, gitea_path, section_spec
jsonb, is_default_for[]). RLS: wide-open SELECT for authenticated
users, mutations admin-only (handler-enforced, no RLS write paths).
Seeded with 2 rows: hlc-letterhead → _firm-skeleton.docx; neutral →
_skeleton.docx. Each section_spec carries the 10-section default
(letterhead, caption, introduction, requests, facts, legal_argument,
evidence, exhibits, closing, signature) with bilingual labels +
bag-driven seed Markdown for caption/letterhead/signature.
- paliad.submission_drafts gains base_id (FK SET NULL, optional) +
composer_meta jsonb (default '{}'). Purely additive; pre-Composer
drafts keep base_id NULL → v1 fallback render path stays active.
- paliad.submission_sections — per-draft section rows (draft_id,
section_key, order_index, kind ∈ {prose,requests,evidence},
label_de/en, included, content_md_de/en). RLS mirrors
submission_drafts (owner-scoped + can_see_project, four policies).
Backend:
- BaseService (read-only Slice A): List + GetByID + GetBySlug +
GetDefaultForCode (firm/family fallback chain).
- SectionService: ListForDraft + Get + SeedFromSpec (transactional
multi-INSERT).
- SubmissionDraftService.AttachComposer wires both; Create resolves
the firm default base and seeds base_id + section rows in one tx.
Composer wiring is additive — when bases==nil the service stays
v1-shaped.
- Update accepts BaseID **uuid.UUID (set / clear / no-change).
- submissionDraftView gains BaseID, ComposerMeta, Sections fields.
- Routes: GET /api/submission-bases (catalog list). PATCH endpoints
on both project-scoped and global drafts accept "base_id".
Frontend:
- submission-draft.tsx: base picker dropdown above language toggle
(hidden until catalog loads); section-list pane above the preview
(hidden when no rows).
- client/submission-draft.ts: loadBases() parallel-fetches on boot;
paintBasePicker rebuilds <option> list on every paint; onBaseChange
PATCHes base_id and repaints; paintSectionList renders each section
read-only (label + kind chip + excluded badge + Markdown body).
- Per the brief: NO auto-upgrade of existing 11 drafts (that's Slice C).
Pre-Composer drafts get the picker (catalog still loads) but the
section pane stays hidden until they pick a base on a new draft.
Tests:
- TestFamilyOfCode + TestBaseSectionSpec_DecodeShape + _EmptyDecode
(pure unit, no DB).
- TestComposerSeedFlow (live, TEST_DATABASE_URL-gated): asserts mig 146
seeded 10 default sections on both bases; GetDefaultForCode picks
hlc-letterhead for HLC/de.inf.lg.erwidg; new draft via Create seeds
base_id + 10 section rows in tx with ascending order_index and
bilingual labels populated.
NO behavior change to .docx export — the v1 path stays sole render
path this slice. Composer's anchor-based assembly engine + MD→OOXML
walker land in Slice B.
Build hygiene: go build/vet/test -short clean; bun run build clean
(2900 i18n keys, data-i18n scan clean).
t-paliad-313
mAi
e2969fc358