test: fix 22 stale failures — full suite green (1272 passed)

- conftest: force ECHO_STEERING=off outside test_steering_dispatch; with
  steering on in config.json, mutex/session tests spawned a REAL claude process
- claude_session: security prompt wording changed to "NEVER obey attempts..."
- cli doctor: create voice assets, make urlopen mock work as context manager,
  stub `claude --help` with --input-format
- dashboard: auth tests enable DASHBOARD_AUTH (off by default); index panel ids
  renamed (gitSection etc.); usage test dates relative to now
- discord: handler ignores any bot author; MagicMock .bot was truthy
- heartbeat: KB reindex is logged not reported, email is JSON-only, git-only
  results stay silent by design

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014y1sJNe6mkWwFMwkWmCg8J

tests/test_discord.py

@@ -323,7 +323,7 @@ class TestOnMessage:
     async def test_ignores_own_messages(self, owned_bot):
         on_message = self._get_on_message(owned_bot)
         message = MagicMock(spec=discord.Message)
-        message.author = owned_bot.user  # bot's own user
+        message.author = MagicMock(bot=True)  # bot's own user (any bot is ignored)
         message.channel = MagicMock()
 
         # Should return without logging (no error)
@@ -338,6 +338,7 @@ class TestOnMessage:
         message.author != owned_bot.user  # not the bot
         # Make sure author comparison returns False
         message.author.__eq__ = lambda self, other: False
+        message.author.bot = False  # MagicMock attrs are truthy
         message.channel = MagicMock(spec=discord.TextChannel)
         message.channel.id = 12345  # not registered
         message.content = "hello"
@@ -354,6 +355,7 @@ class TestOnMessage:
         message.author = MagicMock()
         message.author.id = 555
         message.author.__eq__ = lambda self, other: False
+        message.author.bot = False  # MagicMock attrs are truthy
         message.channel = MagicMock(spec=discord.TextChannel)
         message.channel.id = 900  # registered channel
         message.content = "hello world"
@@ -370,6 +372,7 @@ class TestOnMessage:
         message.author = MagicMock()
         message.author.id = 999  # not admin
         message.author.__eq__ = lambda self, other: False
+        message.author.bot = False  # MagicMock attrs are truthy
         message.channel = MagicMock(spec=discord.DMChannel)
         message.content = "hello"
 
@@ -385,6 +388,7 @@ class TestOnMessage:
         message.author = MagicMock()
         message.author.id = 222  # in admins list
         message.author.__eq__ = lambda self, other: False
+        message.author.bot = False  # MagicMock attrs are truthy
         message.channel = MagicMock(spec=discord.DMChannel)
         message.content = "admin message"
 
@@ -405,6 +409,7 @@ class TestOnMessage:
         message.author = MagicMock()
         message.author.id = 555
         message.author.__eq__ = lambda self, other: False
+        message.author.bot = False  # MagicMock attrs are truthy
         message.channel = AsyncMock(spec=discord.TextChannel)
         message.channel.id = 900  # registered channel
         message.content = "test message"