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

asset/nginx/newsfeed.internal.conf

@@ -0,0 +1,53 @@
+# Mesh-only vhost for newsfeed, fronted by the oolon edge proxy (kosherinata site).
+# Cert: internal `lair` CA, minted by infra-setup.sh and renewed by step@newsfeed.timer
+# (see architecture internal-tls.md). Serves the static SPA and reverse-proxies the API
+# to the newsfeed-api daemon on slartibartfast over the WireGuard mesh.
+#
+# Enable with a relative symlink into sites-enabled (reverse-proxies.md §4):
+#   ln -sf ../sites-available/newsfeed.internal.conf /etc/nginx/sites-enabled/
+
+upstream newsfeed_api {
+    server slartibartfast.kosherinata.internal:8081;
+    keepalive 16;
+}
+
+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    http2 on;
+    server_name newsfeed.internal;
+
+    ssl_certificate     /etc/nginx/tls/cert/newsfeed.internal.pem;
+    ssl_certificate_key /etc/nginx/tls/key/newsfeed.internal.pem;
+    ssl_protocols       TLSv1.3;
+    ssl_trusted_certificate /etc/pki/ca-trust/source/anchors/root-internal.pem;
+
+    root /var/www/newsfeed;
+    index index.html;
+
+    # API + health probe → newsfeed-api on slartibartfast.
+    location /v1/ {
+        proxy_pass http://newsfeed_api;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        # For future WebSocket streaming endpoints, add the standard Upgrade/Connection
+        # map here (define `$connection_upgrade` once in http context).
+    }
+    location = /health {
+        proxy_pass http://newsfeed_api;
+    }
+
+    # Static SPA with client-side routing fallback.
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Long-cache the fingerprinted asset bundle.
+    location /assets/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        try_files $uri =404;
+    }
+}