feat(tools): add Google Calendar tools and register Gmail/GCal in daemon

Add calendar.today, calendar.list, calendar.search tools mirroring the
Gmail tool pattern. Includes gcal-auth CLI command, config schema, tool
policy entries (messaging/coding profiles + group:gcal), and 17 tests.
Also wires up gmail and gcal tool registration in the daemon and TUI.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/tools/policy.ts

@@ -20,6 +20,11 @@ const PROFILE_TOOLS: Record<ToolProfile, Set<string>> = {
     'memory.write',
     'memory.search',
     'web.search',
+    'gmail.list',
+    'gmail.search',
+    'calendar.today',
+    'calendar.list',
+    'calendar.search',
   ]),
   coding: new Set([
     'file.read',
@@ -30,6 +35,11 @@ const PROFILE_TOOLS: Record<ToolProfile, Set<string>> = {
     'memory.write',
     'memory.search',
     'web.search',
+    'gmail.list',
+    'gmail.search',
+    'calendar.today',
+    'calendar.list',
+    'calendar.search',
     'file.write',
     'file.edit',
     'file.patch',
@@ -57,6 +67,8 @@ export const TOOL_GROUPS: Record<string, string[]> = {
   'group:runtime': ['shell.exec', 'process.start', 'process.output', 'process.status', 'process.kill', 'process.list'],
   'group:web': ['web.fetch', 'web.search', 'browser.navigate', 'browser.screenshot', 'browser.click', 'browser.type', 'browser.content', 'browser.eval'],
   'group:memory': ['memory.read', 'memory.write', 'memory.search'],
+  'group:gmail': ['gmail.list', 'gmail.search'],
+  'group:gcal': ['calendar.today', 'calendar.list', 'calendar.search'],
 };
 
 /** Expand group references in a list of tool names/patterns. */