feat: add advanced context actions and optional translation

lib/build-url.js

@@ -2,7 +2,7 @@
 //
 // Every ChatGPT parameter below is undocumented by OpenAI and has broken before.
 // This module's contract is only that it emits a well-formed URL; whether
-// ChatGPT honours model / temporary-chat / hints is out of our control, which is
+// ChatGPT honours temporary-chat / hints is out of our control, which is
 // why each is independently omittable and every label is hint-strength.
 //
 // The root path is mandatory: chatgpt.com/search began returning 404 in
@@ -15,7 +15,7 @@ export const MAX_URL_CHARS = 8000;
 // Fraction of the kept text within which a whitespace cut is preferred.
 const WHITESPACE_WINDOW = 0.9;
 
-function applyTemplate(template, query) {
+export function applyTemplate(template, query) {
   if (query === "") {
     return "";
   }
@@ -33,10 +33,6 @@ function applyTemplate(template, query) {
 }
 
 function addOptionalParams(url, settings) {
-  const model = typeof settings.model === "string" ? settings.model.trim() : "";
-  if (model !== "") {
-    url.searchParams.set("model", model);
-  }
   if (settings.temporaryChat) {
     url.searchParams.set("temporary-chat", "true");
   }
@@ -56,9 +52,6 @@ function lastWhitespaceIndex(text) {
 }
 
 // Returns the longest prefix of `prompt` whose finished URL fits the budget.
-// The guarantee assumes `settings` came through mergeSettings(): only `q` is
-// ever trimmed, so a model longer than MAX_MODEL_CHARS could blow the budget on
-// its own and leave no room for `q` at all. Every real caller goes via load().
 // Slicing happens by CODE POINT on the decoded string, so a surrogate pair can
 // never be split and a percent-escape can never be severed (encoding happens
 // afterwards, via URLSearchParams).
@@ -106,3 +99,10 @@ export function buildChatGptUrl(settings, rawQuery) {
   addOptionalParams(url, settings);
   return url.href;
 }
+
+// Encode a complete prompt without silently shortening it.
+export function serializePrompt(settings, prompt) {
+  const url = new URL(BASE);
+  if (prompt) url.searchParams.set("q", prompt);
+  return addOptionalParams(url, settings).href;
+}