feat: initial release of The Pondering Orb

A retro CRT-themed web TV that channel-surfs live HLS streams through a
security-hardened, same-origin Rust relay.

Front end (vanilla JS + HLS.js, no framework/build step):
- SourceProvider abstraction + canonical Channel/Program model so public
  streams and future self-hosted media share one UI (MockProvider built first
  to keep the UI provably source-agnostic; IptvOrgProvider for live data)
- Red/black phosphor CRT theme, virtualized 1994-style guide (The Almanac),
  cable-box zapping with 7-segment OSD, scrying-static transitions
- Theater/Dim/Ambient immersion modes, dead-stream "orb clouds over" handling
- The Lexicon in-world naming with mundane-mode; full a11y + reduced-motion
- HLS.js pinned + Subresource-Integrity verified

Rust relay (hyper 1.x + tokio-rustls/ring + hickory-resolver):
- Serves the SPA and proxies HLS from one origin (no CORS, untainted canvas)
- SSRF defense: resolve -> reject private/loopback/link-local/metadata IPs ->
  connect to the validated IP (no re-resolve, defeats DNS-rebind), fail-closed
- HTTPS-only egress, re-validated redirects, manifest URL rewrite, size/
  concurrency caps, strict CSP + security headers, path-traversal guard
- /metrics observability + structured logs (host only, never raw URLs)

Verified: all SSRF probes rejected, CSP clean, real Apple HLS manifest
rewritten, ~39k iptv-org channels fetched end-to-end, tests green, zero warnings.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,22 @@
+# Rust
+/server/target
+**/*.rs.bk
+
+# build artifacts
+/dist
+*.log
+
+# editor
+.vscode
+.idea
+*.swp
+
+# OS
+.DS_Store
+
+# local config / secrets (never commit)
+*.env
+.env
+config.local.*
+*.key
+*.pem