dream: dream-run entry point + request/response host adapter + 20 tests

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plans/dream-on-sx.md

@@ -73,7 +73,7 @@ The five types: `request`, `response`, `handler = request -> response`, `middlew
       - `dream-websocket handler` — upgrades request; handler `(fn (ws) ...)`.
       - `dream-send ws msg`, `dream-receive ws`, `dream-close ws`.
 - [x] **Static files:** `dream-static root-path` — serves files, ETags, range requests.
-- [ ] **`dream-run`**: wires root handler into SX's `perform (:http-listen ...)`.
+- [x] **`dream-run`**: wires root handler into SX's `perform (:http-listen ...)`.
 - [ ] **Demos** in `lib/dream/demos/`:
       - `hello.ml` → `lib/dream/demos/hello.sx`: "Hello, World!" route.
       - `counter.ml` → `lib/dream/demos/counter.sx`: in-memory counter with sessions.
@@ -189,6 +189,15 @@ Confirm scope before starting; some of these may be addable as Dream-internal he
   unsatisfiable → 416). `..`/absolute path traversal → 403; missing → 404; full
   responses advertise `Accept-Ranges`. Filesystem is injectable —
   `dream-static-perform-fs` (host) vs `dream-memory-fs` (in-memory map for tests).
+- **2026-06-07 — dream-run** (`lib/dream/run.sx`, 20 tests). `dream-run handler`
+  installs the root handler via `(perform (:http/listen {:port :host :app …}))` — no
+  socket code, it wraps the existing server. `dream-app handler` is the adapter the
+  host invokes per request: raw `{:method :target :headers :body}` → `dream-request`
+  → handler → serialised `{:status :headers :body :set-cookies}`, or a `{:status 101
+  :websocket …}` upgrade. Bare-string handlers coerced; method defaults to GET;
+  set-cookies (from session/flash) flow through. Listen transport injectable
+  (`dream-run-with`) so the full wiring is tested with a mock that captures the op and
+  re-runs the captured app. `dream-run-port` / `dream-run-opts` variants.
 
 ## Blockers