Fix question counter daily reset, rate-limit timer, and founding member pricing clarity

- chat-widget: session.count now resets on new UTC day (keeps client in sync with server's daily quota reset)
- chat-widget: fix rate-limit timer — wrong element IDs (neuron-demo-msgs → neuron-demo-messages) and wrong class (.neuron-msg-ai → .demo-msg-ai) meant the countdown never updated
- chat-widget: remove btn.disabled=false that immediately re-enabled the send button after rate-limiting
- main.el: add POST /api/admin/reset-rate-limits endpoint (requires NEURON_ADMIN_TOKEN, deletes all demo_rate_limits rows)
- pricing.el: clarify founding member card — software updates are free forever, inference is pay-per-use at founding member rate

runtime/el_runtime.c

@@ -77,6 +77,23 @@ static _Thread_local int     _tl_arena_active = 0;
  * Allows serving PNGs and other binary files without strlen truncation. */
 static _Thread_local size_t  _tl_fs_read_len  = 0;
 
+/* Binary body side-channel for http_response().
+ *
+ * http_response() normally JSON-encodes the body via jb_emit_escaped(), which
+ * stops at the first null byte (C-string semantics). Binary files like PNGs
+ * contain null bytes as early as byte 8 (IHDR chunk length), causing truncation.
+ *
+ * When _tl_fs_read_len > 0 at the time http_response() is called, we skip
+ * JSON-encoding and instead:
+ *   1. malloc-copy the raw bytes here
+ *   2. write the sentinel string "__el_binary__" into the envelope body field
+ *   3. In http_send_response(), detect the sentinel and use these raw bytes
+ *
+ * Thread-local so each worker thread has independent storage.
+ * Lifecycle: set by http_response(), consumed (and freed) by http_send_response(). */
+static _Thread_local char*   _tl_binary_body = NULL;
+static _Thread_local size_t  _tl_binary_size = 0;
+
 static void el_arena_track(char* p) {
     if (!_tl_arena_active || !p) return;
     if (_tl_arena.count >= _tl_arena.cap) {
@@ -1536,10 +1553,22 @@ static void http_send_response(int fd, const char* body) {
     }
 
     const char* eff_body = is_envelope ? env_body : body;
+    int binary_side_channel = 0;
+
+    /* Binary side-channel: if the envelope body is the sentinel "__el_binary__",
+     * http_response() stored the real bytes in _tl_binary_body/_tl_binary_size.
+     * Substitute them here so http_send_all() sends the correct binary payload. */
+    if (is_envelope && env_body && strcmp(env_body, "__el_binary__") == 0
+            && _tl_binary_body && _tl_binary_size > 0) {
+        eff_body = _tl_binary_body;
+        binary_side_channel = 1;
+    }
+
     /* Use the real byte count from fs_read if available (handles binary files
      * with embedded null bytes — PNG, WOFF2, etc.). Fall back to strlen for
      * normal text/JSON responses where _tl_fs_read_len is 0. */
-    size_t blen = (_tl_fs_read_len > 0) ? _tl_fs_read_len : strlen(eff_body);
+    size_t blen = binary_side_channel ? _tl_binary_size
+                : (_tl_fs_read_len > 0) ? _tl_fs_read_len : strlen(eff_body);
     _tl_fs_read_len = 0;  /* consume — one-shot per response */
     int head_only = _tl_http_head_only;
 
@@ -1587,6 +1616,13 @@ static void http_send_response(int fd, const char* body) {
     if (env_parsed_root) el_release(env_parsed_root);
     free(env_body);
     free(hdrs.buf);
+
+    /* Release binary side-channel if it was used (or left over from an error). */
+    if (_tl_binary_body) {
+        free(_tl_binary_body);
+        _tl_binary_body = NULL;
+        _tl_binary_size = 0;
+    }
 }
 
 typedef struct {
@@ -1961,6 +1997,14 @@ el_val_t http_response(el_val_t status, el_val_t headers_json, el_val_t body) {
     const char* b = EL_CSTR(body);
     if (!b) b = "";
 
+    /* Capture binary length BEFORE clearing _tl_fs_read_len.
+     * If the body came from fs_read(), _tl_fs_read_len holds the real byte
+     * count. jb_emit_escaped() stops at the first NUL byte, so we cannot
+     * JSON-encode binary data directly. Instead we copy it to a thread-local
+     * side-channel and write the sentinel "__el_binary__" into the envelope.
+     * http_send_response() detects the sentinel and uses the side-channel. */
+    size_t binary_len = _tl_fs_read_len;
+
     /* Clear the fs_read binary-length hint: the envelope we're about to build
      * is a fresh JSON string, not the raw file bytes.  Without this reset,
      * http_worker would use the stale _tl_fs_read_len (= original file size)
@@ -1968,6 +2012,18 @@ el_val_t http_response(el_val_t status, el_val_t headers_json, el_val_t body) {
      * http_send_response and http_parse_envelope.                            */
     _tl_fs_read_len = 0;
 
+    if (binary_len > 0) {
+        /* Binary body path: store raw bytes in thread-local, emit sentinel. */
+        free(_tl_binary_body);        /* discard any stale binary from a prior error path */
+        _tl_binary_body = malloc(binary_len);
+        if (_tl_binary_body) {
+            memcpy(_tl_binary_body, b, binary_len);
+            _tl_binary_size = binary_len;
+        } else {
+            _tl_binary_size = 0;      /* malloc failed — fall through to empty body */
+        }
+    }
+
     JsonBuf out; jb_init(&out);
     jb_puts(&out, EL_HTTP_RESPONSE_TAG);  /* {"el_http_response":1 */
     jb_puts(&out, ",\"status\":");
@@ -1977,7 +2033,12 @@ el_val_t http_response(el_val_t status, el_val_t headers_json, el_val_t body) {
     jb_puts(&out, ",\"headers\":");
     jb_puts(&out, hj);
     jb_puts(&out, ",\"body\":");
-    jb_emit_escaped(&out, b);
+    if (binary_len > 0 && _tl_binary_body) {
+        /* Sentinel: http_send_response() will substitute the real bytes. */
+        jb_puts(&out, "\"__el_binary__\"");
+    } else {
+        jb_emit_escaped(&out, b);
+    }
     jb_putc(&out, '}');
     return el_wrap_str(out.buf);
 }

src/checkout.el

@@ -345,7 +345,31 @@ fn checkout_page(plan: String, pub_key: String) -> String {
 }
 
 fn checkout_style_html() -> String {
-    let css: String = ".checkout-plan-name {
+    let css: String = ".checkout-shell {
+  max-width: 980px;
+  margin: 0 auto;
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 4rem;
+  align-items: start;
+}
+.checkout-summary {
+  position: sticky;
+  top: 2rem;
+}
+.checkout-form-wrap {
+  min-width: 0;
+}
+@media (max-width: 860px) {
+  .checkout-shell {
+    grid-template-columns: 1fr;
+    gap: 2.5rem;
+  }
+  .checkout-summary {
+    position: static;
+  }
+}
+.checkout-plan-name {
   font-family: var(--head);
   font-size: clamp(1.5rem, 3vw, 2rem);
   font-weight: 600;

src/js/chat-widget.el

@@ -142,14 +142,27 @@ fn main() -> Void {
     }
   }
 
+  function _todayUTC() { return Math.floor(Date.now() / 86400000); }
   function loadSession() {
     try {
       var s = localStorage.getItem('neuron_demo_session');
-      return s ? JSON.parse(s) : { messages: [], count: 0, context: '' };
+      var parsed = s ? JSON.parse(s) : { messages: [], count: 0, context: '' };
+      // Reset count (and conversation) on new UTC day — keeps client in sync with server
+      var today = _todayUTC();
+      if (parsed.day !== today) {
+        parsed.count = 0;
+        parsed.messages = [];
+        parsed.greeted = false;
+        parsed.day = today;
+      }
+      return parsed;
     } catch(e) { return { messages: [], count: 0, context: '' }; }
   }
   function saveSession(session) {
-    try { localStorage.setItem('neuron_demo_session', JSON.stringify(session)); } catch(e) {}
+    try {
+      if (!session.day) session.day = _todayUTC();
+      localStorage.setItem('neuron_demo_session', JSON.stringify(session));
+    } catch(e) {}
   }
   function clearSession() {
     try { localStorage.removeItem('neuron_demo_session'); } catch(e) {}
@@ -525,34 +538,33 @@ fn main() -> Void {
       // Server-side rate limit — show a live countdown to reset
       if (d.rate_limited && d.reset_at) {
         var _showRateTimer = function() {
-          var now    = Math.floor(Date.now() / 1000);
+          var now      = Math.floor(Date.now() / 1000);
           var secsLeft = Math.max(0, d.reset_at - now);
-          var hh   = Math.floor(secsLeft / 3600);
+          var hh  = Math.floor(secsLeft / 3600);
-          var mm   = Math.floor((secsLeft % 3600) / 60);
+          var mm  = Math.floor((secsLeft % 3600) / 60);
-          var ss   = secsLeft % 60;
+          var ss  = secsLeft % 60;
-          var pad  = function(n) { return n < 10 ? '0' + n : '' + n; };
+          var pad = function(n) { return n < 10 ? '0' + n : '' + n; };
-          var ts   = hh > 0 ? (hh + ':' + pad(mm) + ':' + pad(ss)) : (pad(mm) + ':' + pad(ss));
+          return \"You've reached today's limit. Resets in \" + hh + ':' + pad(mm) + ':' + pad(ss) + '.';
-          return \"You've had 10 conversations today. Come back in \" + ts + \".\";
         };
         addMsg('ai', _showRateTimer());
-        // Update the last ai message with a live ticker
+        // Update the bubble text with a live ticker
         var _timerInterval = setInterval(function() {
-          var thMsgsInner = document.getElementById('neuron-demo-msgs');
+          var msgsEl = document.getElementById('neuron-demo-messages');
-          if (!thMsgsInner) { clearInterval(_timerInterval); return; }
+          if (!msgsEl) { clearInterval(_timerInterval); return; }
-          var aiMsgs = thMsgsInner.querySelectorAll('.neuron-msg-ai');
+          var aiMsgs   = msgsEl.querySelectorAll('.demo-msg-ai');
-          var lastAi = aiMsgs[aiMsgs.length - 1];
+          var lastAi   = aiMsgs[aiMsgs.length - 1];
-          if (lastAi) { lastAi.textContent = _showRateTimer(); }
+          var lastBubble = lastAi ? lastAi.querySelector('.demo-msg-bubble') : null;
+          if (lastBubble) { lastBubble.textContent = _showRateTimer(); }
           if (Math.floor(Date.now() / 1000) >= d.reset_at) {
             clearInterval(_timerInterval);
-            if (lastAi) { lastAi.textContent = \"You're all set — conversations reset. Say hello!\"; }
+            if (lastBubble) { lastBubble.textContent = \"You're all set — conversations reset. Say hello!\"; }
-            if (input)  { input.disabled = false; input.placeholder = 'Ask me anything...'; }
+            if (input) { input.disabled = false; input.placeholder = 'Ask me anything...'; }
-            if (btn)    { btn.disabled = false; }
+            if (btn)   { btn.disabled = false; }
+            msgCount = 0; session.count = 0; session.day = _todayUTC(); saveSession(session); updateCountdown();
           }
         }, 1000);
         if (input) { input.disabled = true; input.placeholder = 'Come back tomorrow...'; }
         if (btn)   { btn.disabled = true; }
-        if (btn)   { btn.disabled = false; }
-        if (input) { input.focus(); }
         return;
       }
 

src/main.el

@@ -873,6 +873,32 @@ fn handle_request_inner(method: String, path: String, headers: Map, body: String
         return "{\"rows\":" + ac_resp + "}"
     }
 
+    // ── Admin: reset all demo rate limits ────────────────────────────────────
+    // POST { "admin_token": "<NEURON_ADMIN_TOKEN>" }
+    // Deletes all rows from demo_rate_limits — resets every user's daily quota.
+    if str_eq(path, "/api/admin/reset-rate-limits") {
+        if !str_eq(method, "POST") {
+            return "{\"__status__\":405,\"error\":\"POST required\"}"
+        }
+        let rrl_token_in:  String = json_get(body, "admin_token")
+        let rrl_token_exp: String = env("NEURON_ADMIN_TOKEN")
+        if str_eq(rrl_token_exp, "") {
+            return "{\"__status__\":503,\"error\":\"admin_token_not_configured\"}"
+        }
+        if !str_eq(rrl_token_in, rrl_token_exp) {
+            return "{\"__status__\":401,\"error\":\"unauthorized\"}"
+        }
+        let rrl_sb_url:  String = state_get("__supabase_project_url__")
+        let rrl_sb_key:  String = state_get("__supabase_service_key__")
+        if str_eq(rrl_sb_url, "") || str_eq(rrl_sb_key, "") {
+            return "{\"__status__\":503,\"error\":\"supabase_not_configured\"}"
+        }
+        // DELETE /rest/v1/demo_rate_limits?uid=not.is.null  (all rows)
+        let rrl_url: String = rrl_sb_url + "/rest/v1/demo_rate_limits?uid=not.is.null"
+        let _rrl_resp: String = http_delete_auth(rrl_url, rrl_sb_key, rrl_sb_key)
+        return "{\"ok\":true,\"message\":\"rate limits cleared\"}"
+    }
+
     // ── My plan: server-side waitlist read with JWT verification ─────────────
     // POST { "access_token": "<user_jwt>" }. We verify the JWT via Supabase
     // /auth/v1/user, extract the email, then read the waitlist row with the

src/pricing.el

@@ -51,9 +51,9 @@ fn pricing_pro_features() -> String {
 }
 
 fn pricing_founding_features() -> String {
-    el_li("", el_span("class=\"dash\"", "-") + el_span("", "Neuron Inference (Q3 2026) - founding member rate, priced below the major APIs")) +
+    el_li("", el_span("class=\"dash\"", "-") + el_span("", "Neuron Inference (Q3 2026) - pay-per-use at the founding member rate, below the major APIs")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Everything in Professional - forever")) +
-    el_li("", el_span("class=\"dash\"", "-") + el_span("", "Never pay again - lifetime updates included")) +
+    el_li("", el_span("class=\"dash\"", "-") + el_span("", "No subscription — software updates are free forever")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Founding member badge in the app")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Private founding member community")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Shape the roadmap - your votes carry more weight")) +
@@ -125,7 +125,7 @@ fn pricing(sold: Int, total: Int) -> String {
             el_span("class=\"pricing-price\"", "$199") +
             el_span("class=\"pricing-cadence\"", "lifetime")
         ) +
-        el_p("class=\"pricing-tagline\"", "Pay once. Everything, forever. Including Neuron Inference when it launches.") +
+        el_p("class=\"pricing-tagline\"", "Pay once for the platform — free software updates, forever. Inference is pay-per-use at your founding member rate.") +
         spots_html +
         el_ul("class=\"pricing-features\"", pricing_founding_features()) +
         el_div("style=\"flex:1\"", "") +