Houmeres/LLeMbas
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 3 Wiki Activity

PWA, one send/stop button, audio in and out, web search as a tool

Browse Source 
Four pieces of work.

**Installable.** A manifest carrying the instance name, PWA icons rasterised
from the existing mark at design time, a service worker and a themed offline
page. The worker caches the shell only and bails out on /api/, /auth/, /admin/
and anything accepting text/event-stream -- passing a reply stream through a
worker turns it into one delivery at the end, or nothing. It is served from
GET /sw.js rather than the static mount because a worker's scope is the path it
came from.

**Send and Stop are one button.** They were two, and the hidden one was never
hidden: `.btn` is display: inline-flex, which outranks the browser's own
`[hidden] { display: none }`, so Stop sat permanently beside Send. app.css now
forces the attribute to win -- every control toggled with `hidden` depended on
that -- and the composer renders one button carrying both icons, with ui.js
flipping data-composer-action and the type with it.

**Audio.** Speech to text and text to speech against any OpenAI-shaped
/v1/audio/* endpoint: dictate into the composer, have a reply read out.
Instance settings in Admin, per-reader overrides in Settings, with the voice
list discovered from the server where it offers one. Recorded audio is capped
and never written to disk -- it is not an attachment, it has no owner, and
nothing would ever sweep it.

**Web search, as a tool.** This is the tool loop PLAN.md described as the real
work: one reply is now a bounded sequence of requests rather than one. The model
asks, the tool runs, the result goes back and it is asked again, up to three
rounds. Providers are DuckDuckGo (no setup), SearXNG and Firecrawl.

Two decisions worth stating. Tools are only offered to models flagged `tools`,
because an endpoint without support rejects the whole request rather than
ignoring the array -- the same reason images only reach models flagged
`vision`. And tool results are not replayed as context on the next turn, for the
same reasons reasoning is not: the answer already contains what the model made
of them, and replaying stale results into every later request wastes the window
and reliably sends a small model into a search loop. The sources stay visible in
the transcript instead.

Search results are untrusted third-party text and are treated as such: escaped,
and only http/https URLs rendered as links.

338 tests, ruff clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Jaroslav Beneš
2026-07-21 17:56:50 +02:00
parent ca3e4fd04f
commit 436226370a
61 changed files with 4481 additions and 116 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/lembas/web/static/js/ui.js
+40 -39
View File
@@ -400,11 +400,17 @@ document.addEventListener("lembas:unread", function (event) {
/*
Send becomes Stop while a reply is being written.
The composer and the streaming bubble are far apart in the document, so the
link between them is made here: whenever the thread changes, look for a
message that is still streaming and point the button at it. A MutationObserver
rather than htmx events, because the bubble is replaced by an SSE swap that
does not always surface as one.
One button in the markup (see chat/_composer.html), retargeted here. The
composer and the streaming bubble are far apart in the document, so the link
between them is made at runtime: whenever the thread changes, look for a
message that is still streaming and point the button at it. A
MutationObserver rather than htmx events, because the bubble is replaced by
an SSE swap that does not always surface as one.
This used to build a second button and hide it with the `hidden` attribute,
which did nothing at all: `.btn` sets `display: inline-flex`, and that beats
the browser's `[hidden] { display: none }`. app.css now forces the attribute
to win, and there is only one button to get wrong.
*/
(function () {
"use strict";
@@ -418,48 +424,43 @@ document.addEventListener("lembas:unread", function (event) {
}
function sync() {
var form = document.querySelector(".composer__form");
if (!form) return;
var send = form.querySelector('[type="submit"]');
var stop = form.querySelector("[data-composer-stop]");
var button = document.querySelector("[data-composer-action]");
if (!button) return;
var active = streamingMessage();
if (active) {
if (send) send.hidden = true;
if (!stop) {
stop = document.createElement("button");
stop.type = "button";
stop.className = "btn btn--icon composer__btn composer__stop";
stop.setAttribute("data-composer-stop", "");
stop.setAttribute("aria-label", "Stop generating");
stop.title = "Stop generating";
stop.innerHTML = '<span class="composer__stop-square"></span>';
stop.addEventListener("click", function () {
var target = streamingMessage();
if (!target) return;
stop.disabled = true;
fetch(
"/api/chats/" + target.chatId + "/messages/" + target.messageId + "/stop",
{ method: "POST", credentials: "same-origin" }
).catch(function () { stop.disabled = false; });
});
(send ? send.parentNode : form).appendChild(stop);
}
stop.hidden = false;
stop.disabled = false;
} else {
if (send) send.hidden = false;
if (stop) stop.hidden = true;
}
button.dataset.composerAction = active ? "stop" : "send";
// As a submit button the form sends; as a plain button the click handler
// below stops. Nothing else distinguishes the two states.
button.type = active ? "button" : "submit";
button.setAttribute("aria-label", active ? "Stop generating" : "Send");
button.title = active ? "Stop generating" : "";
button.disabled = false;
}
document.addEventListener("click", function (event) {
var button = event.target.closest('[data-composer-action="stop"]');
if (!button) return;
event.preventDefault();
var target = streamingMessage();
if (!target) return;
// Disabled until the next sync, so a second click cannot fire a second
// request at a generation that is already stopping.
button.disabled = true;
fetch(
"/api/chats/" + target.chatId + "/messages/" + target.messageId + "/stop",
{ method: "POST", credentials: "same-origin" }
).catch(function () { button.disabled = false; });
});
function watch() {
var thread = document.getElementById("thread");
if (!thread) return;
new MutationObserver(sync).observe(thread, { childList: true, subtree: true });
if (thread) {
new MutationObserver(sync).observe(thread, { childList: true, subtree: true });
}
sync();
}
document.addEventListener("DOMContentLoaded", watch);
document.body && document.body.addEventListener("htmx:afterSwap", sync);
document.body && document.body.addEventListener("htmx:afterSettle", sync);
})();