feat(system): stderr routing migration Phase 3 — 10 branches migrated (FPLAN-0033)

Migrated error()/warning() calls across 10 branches to use CLI display API
which routes to stderr. 48 files modified across ai_mail, api, backup, daemon,
flow, memory, prax, seedgo, spawn, trigger. Seedgo stderr_routing standard
created (24th standard) with full-file scanning. System average 49% → 69%.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/aipass/daemon/apps/modules/actions.py

@@ -20,7 +20,7 @@ from typing import List
 
 from aipass.prax import logger
 
-from aipass.cli.apps.modules import console
+from aipass.cli.apps.modules import console, error as cli_error
 
 def _header(text):
     console.print(f"\n[bold cyan]{'='*70}[/bold cyan]")
@@ -31,7 +31,7 @@ def _success(text):
     console.print(f"[green]OK:[/green] {text}")
 
 def _error(text):
-    console.print(f"[red]ERROR:[/red] {text}")
+    cli_error(text)
 
 from aipass.daemon.apps.handlers.actions.actions_registry import (
     list_actions,

src/aipass/daemon/apps/modules/schedule.py

@@ -21,7 +21,7 @@ from typing import List
 
 from aipass.prax import logger
 
-from aipass.cli.apps.modules import console
+from aipass.cli.apps.modules import console, error as cli_error
 
 def _header(text):
     console.print(f"\n[bold cyan]{'='*70}[/bold cyan]")
@@ -32,7 +32,7 @@ def _success(text):
     console.print(f"[green]OK:[/green] {text}")
 
 def _error(text):
-    console.print(f"[red]ERROR:[/red] {text}")
+    cli_error(text)
 
 # Handler imports
 from aipass.daemon.apps.handlers.schedule.task_registry import (
@@ -178,7 +178,7 @@ def _handle_create(args: List[str]) -> bool:
     try:
         parsed = parser.parse_args(args)
     except SystemExit:
-        console.print("[red]Usage: schedule create \"task\" --due <date> --to @branch [--message \"details\"][/red]")
+        _error('Usage: schedule create "task" --due <date> --to @branch [--message "details"]')
         return False
 
     if not parsed.task:

src/aipass/daemon/apps/modules/update.py

@@ -19,7 +19,7 @@ from typing import Dict, Any, List
 
 from aipass.prax import logger
 
-from aipass.cli.apps.modules import console
+from aipass.cli.apps.modules import console, error
 
 def _header(text):
     console.print(f"\n[bold cyan]{'='*70}[/bold cyan]")
@@ -163,7 +163,7 @@ def handle_command(command: str, args: list) -> bool:
 
     except Exception as e:
         logger.error(f"[DAEMON] Error generating update digest: {e}", exc_info=True)
-        console.print(f"[red]Error: {e}[/red]")
+        error(f"Error: {e}")
         return True