feat: add session name input to tool starter

ToolStarter (used by FAB and workspace detail):
- Add Session Name text input, defaulting to workspace.name
- Pass user-provided name to createInstance display_name parameter
- If left empty or only whitespace, falls back to auto-generated name

Quality gates: tsc --noEmit pass, npm run build pass, 82/82 tests pass

apps/web/src/components/features/tool/tool-starter.tsx

@@ -33,6 +33,7 @@ export function ToolStarter({
 	const [sshKeysLoading, setSshKeysLoading] = useState(true);
 	const [selectedSshKeyIds, setSelectedSshKeyIds] = useState<string[]>([]);
 
+	const [displayName, setDisplayName] = useState(workspace.name);
 	const [starting, setStarting] = useState(false);
 	const [error, setError] = useState<string | null>(null);
 
@@ -119,7 +120,7 @@ export function ToolStarter({
 				workspace.project_id,
 				workspace.repo_id,
 				selectedToolTypeId,
-				workspace.name,
+				displayName.trim() || undefined,
 				undefined,
 				undefined,
 				undefined,
@@ -140,7 +141,7 @@ export function ToolStarter({
 		} finally {
 			setStarting(false);
 		}
-	}, [selectedToolTypeId, selectedProfileId, workspace, onStarted]);
+	}, [selectedToolTypeId, selectedProfileId, displayName, workspace, onStarted]);
 
 	return (
 		<div className="tool-starter">
@@ -187,6 +188,19 @@ export function ToolStarter({
 				{toolTypesError && <span className="error-text">{toolTypesError}</span>}
 			</div>
 
+			{/* Session Name */}
+			<div className="form-group">
+				<label htmlFor="session-name">Session Name</label>
+				<input
+						id="session-name"
+						type="text"
+						value={displayName}
+						onChange={(e) => setDisplayName(e.target.value)}
+						placeholder="My dev environment"
+						disabled={starting}
+				/>
+			</div>
+
 			{/* Config Profile */}
 			{selectedToolTypeId && (
 				<div className="form-group">