fix(tui): reserve /runtime and block local tool-loop fallback

src/frontends/tui/commands.ts

@@ -14,6 +14,7 @@ export type Command =
   | { type: 'verbose' }
   | { type: 'model'; name?: string; providerModel?: string }
   | { type: 'backend'; provider?: string }
+  | { type: 'runtime'; input?: string }
   | { type: 'login'; provider?: string }
   | { type: 'transfer'; target: string }
   | { type: 'pair'; action?: 'generate' | 'list' | 'revoke'; args?: string }
@@ -154,6 +155,15 @@ export function parseCommand(input: string): Command | null {
     return { type: 'backend', provider };
   }
 
+  // Runtime backend mode control (daemon/channel command; reserved in TUI)
+  if (trimmed === '/runtime') {
+    return { type: 'runtime' };
+  }
+  if (trimmed.startsWith('/runtime ')) {
+    const input = trimmed.slice('/runtime '.length).trim();
+    return { type: 'runtime', input };
+  }
+
   // Transfer
   if (trimmed === '/transfer') {
     return { type: 'transfer', target: '' };
@@ -223,6 +233,7 @@ Commands:
   /model [name]          Show or switch model tier (local, default, fast, complex)
   /model <tier> <p/m>    Change tier's provider/model (e.g. /model default anthropic/claude-sonnet-4)
   /backend [provider]    Show or switch local backend (ollama, llamacpp)
+  /runtime [args]        Runtime backend mode control (daemon/channel sessions)
   /research <task>       Delegate a task to the configured research agent
   /council <task>        Run the councils pipeline for a task
   /council preflight     Check council tier routing, endpoint/auth mode, and probe latency
@@ -261,6 +272,7 @@ export const SLASH_COMMANDS = [
   '/tools',
   '/model',
   '/backend',
+  '/runtime',
   '/research',
   '/council',
   '/reset',
@@ -293,6 +305,7 @@ export const COMMAND_TOOLTIPS: Record<string, string> = {
   '/tools': 'Show authoritative runtime tool list for this session',
   '/model': 'Show or switch model (local, default, fast, complex)',
   '/backend': 'Show or switch local backend (ollama, llamacpp)',
+  '/runtime': 'Runtime backend mode control (daemon/channel command; not local TUI backend switch)',
   '/research': 'Delegate a task to the configured research agent',
   '/council': 'Run the councils pipeline for a task; use "/council preflight" for route/auth checks',
   '/reset': 'Clear conversation history',