feat(status-ui): improve concurrent session workflows

Add in-place session renewal, searchable model selection, clearer progress feedback, tool-result previews, and per-session presentation state.

Keep commands, errors, loading, and lifecycle indicators attached to their owning runtime so parallel tabs cannot interfere.

test/tauri-ui.test.js

@@ -18,11 +18,12 @@ test("wires the desktop to stable runtime workspace APIs", async () => {
 		"close_session_runtime",
 		"list_directory_sessions",
 		"get_session_runtime_snapshot",
+		"renew_session",
 		"subscribe_workspace",
 	])
 		assert.match(`${app}\n${hook}`, new RegExp(operation));
 	assert.doesNotMatch(app, /switch_session/);
-	assert.doesNotMatch(app, /new_session/);
+	assert.doesNotMatch(app, /["']new_session["']/);
 	assert.match(reducer, /WorkspaceState\["runtimesById"\]/);
 	assert.match(reducer, /requestGeneration/);
 	assert.match(reducer, /loadedThroughSeq/);
@@ -54,6 +55,10 @@ test("renders directory sidebar, accessible session tabs, warnings, and reduced
 	assert.match(app, /Many Pi sessions are open/);
 	assert.match(css, /prefers-reduced-motion/);
 	assert.match(css, /grid-template-columns:\s*178px minmax\(0, 1fr\)/);
+	assert.match(
+		css,
+		/\.session-row-content\s*>\s*strong\s*\{[^}]*color:\s*#f1f3f4/s,
+	);
 });
 
 test("preserves native session naming, compaction, composer, and extension responses", async () => {