feat: scaffold newsfeed — user-controlled news feed

A self-hosted feed where the user owns the ranking: per-source and signed
per-interest weights, decayed by recency, via a transparent deterministic
scorer. Content is sourced algorithmically (worker RSS/Atom polling) and
agentically (per-user API tokens POSTing candidates to the ingest endpoint).
Single-user today, multi-user by construction (every row keyed on user_id).

Rust cargo workspace + Vite/React/SWC/TS SPA:
- newsfeed-entities: DTOs (ts-rs bindings -> web/src/api/bindings)
- newsfeed-core: ranking, auth primitives, ingest, data-access ports
- newsfeed-data: SQLite adapters (sqlx, runtime queries)
- newsfeed-api: axum REST/JSON daemon
- newsfeed-worker: RSS polling + rescoring loop
- web: responsive, mobile-first SPA (React Query, generated types)

Deploy (Gitea Actions, build static musl + SPA, rsync as gitea_ci):
api+worker -> slartibartfast, SPA -> oolon (nginx serves + proxies /v1).

Deliberate deviations from house conventions (documented in CLAUDE.md/readme):
- SQLite instead of Postgres; api+worker co-locate sharing one DB file.
- Runtime sqlx queries instead of query! macros (SQLite dynamic typing;
  keeps CI database-free).

Verified end-to-end: auth, token ingest, interest-weighted ranking, signals,
pagination (curl + browser); cargo fmt/clippy -D/test and pnpm build/lint pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016fKZzDpvjiJ9eYbPGgJvUP

web/src/api/bindings/CandidateSubmission.ts

@@ -0,0 +1,18 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { Media } from "./Media";
+
+/**
+ * A candidate pushed to `POST /v1/ingest/candidates` by an agentic or algorithmic
+ * source. The authenticated API token determines the owning user; `source` names the
+ * producer for attribution and per-source weighting.
+ */
+export type CandidateSubmission = { 
+/**
+ * Stable de-dup key from the producer. Re-submitting the same key is a no-op.
+ */
+external_id: string, url: string | null, title: string, summary: string | null, author: string | null, tags: Array<string>, media: Array<Media>, published_at: string | null, 
+/**
+ * Optional name of the source that produced this candidate. If it matches an
+ * existing agentic source for the user it is linked; otherwise ingested unlinked.
+ */
+source: string | null, };