Update shared Gaia workflows and Sargo development tooling

Fix camera switching and Contacts/SMS activity routing across shared hosts.
Integrate Marketplace installation and native standalone recovery tools,
Bluetooth runtime packages and trusted certificates.

Update English/French READMEs and the shared changelog with tested scope
and remaining radio/audio/Bluetooth limitations. Preview17 remains the
existing APK; no new native image is released.

Validation: shared JavaScript and native Python tests; Android packaging
and payload parity from an isolated publication checkout.

tests/android-sms-handoff.test.mjs

@@ -0,0 +1,38 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import vm from 'node:vm';
+import {readFileSync} from 'node:fs';
+
+function setup(composer) {
+  let click, assimilated=false;
+  const calls=[];
+  const recipients={numbers:[]};
+  const context={console,location:{hostname:'sms.localhost',pathname:'/index.html'},
+    document:{readyState:'complete',addEventListener:(name,handler)=>{if(name==='click')click=handler;}},
+    VulpesCompat:{call:async(method,params)=>{calls.push({method,params});}},
+    VulpesPlatform:'android',Navigation:{isCurrentPanel:()=>composer},
+    ConversationView:{recipients,activeThread:{participants:['5550123']},assimilateRecipients(){assimilated=true;recipients.numbers=['5550199'];}},
+    Compose:{type:'sms',getText:()=> 'Message à confirmer'},
+  };
+  context.window=context;
+  vm.runInNewContext(readFileSync('host/gaia-restoration.js','utf8'),context);
+  return {calls,context,send(){
+    click({target:{closest:()=>true},preventDefault(){},stopImmediatePropagation(){}});
+    assert.equal(assimilated,true);
+  }};
+}
+test('Android handoff commits the typed recipient before opening its SMS app',()=>{
+  const s=setup(true);s.send();
+  assert.equal(s.calls[0].method,'platform.sms');
+  assert.equal(s.calls[0].params.number,'5550199');
+  assert.equal(s.calls[0].params.body,'Message à confirmer');
+});
+test('Android reply uses the conversation participants and preserves the draft',()=>{
+  const s=setup(false);s.send();
+  assert.equal(s.calls[0].params.number,'5550123');
+  assert.equal(s.context.Compose.getText(),'Message à confirmer');
+});
+test('empty Android messages are not handed off',()=>{
+  const s=setup(true);s.context.Compose.getText=()=>'';s.send();
+  assert.equal(s.calls.length,0);
+});