feat: configurable next action after single mail view (#300)

Add user preference to control what happens after performing an action
(delete, archive, move, snooze, mark as unread) in the single mail view.
The default is to show the next message in the mailbox; users can opt
to return to the mailbox instead.

- New AfterMailViewAction enum (nextMessage, showMailbox)
- DB schema v36: after_mail_view_action column on user_preferences
- UserPreferences model, repository interface and impl updated
- EmailDetailScreen: reads preference, finds next email before action,
  navigates via context.go() or context.pop() accordingly
- UserPreferencesScreen: new "After mail action" section with radio group
- Tests updated: FakeUserPreferencesRepository, migration test, new
  UserPreferencesScreen tests with scroll-to-reveal

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

pubspec.lock

@@ -659,10 +659,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
+      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
       url: "https://pub.dev"
     source: hosted
-    version: "1.18.0"
+    version: "1.17.0"
   mime:
     dependency: "direct main"
     description:
@@ -1088,26 +1088,26 @@ packages:
     dependency: "direct dev"
     description:
       name: test
-      sha256: "8d9ceddbab833f180fbefed08afa76d7c03513dfdba87ffcec2718b02bbcbf20"
+      sha256: "280d6d890011ca966ad08df7e8a4ddfab0fb3aa49f96ed6de56e3521347a9ae7"
       url: "https://pub.dev"
     source: hosted
-    version: "1.31.0"
+    version: "1.30.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
+      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.11"
+    version: "0.7.10"
   test_core:
     dependency: transitive
     description:
       name: test_core
-      sha256: "1991d4cfe85d5043241acac92962c3977c8d2f2add1ee73130c7b286417d1d34"
+      sha256: "0381bd1585d1a924763c308100f2138205252fb90c9d4eeaf28489ee65ccde51"
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.17"
+    version: "0.6.16"
   timezone:
     dependency: transitive
     description:

scripts/agent_loop.py

@@ -32,7 +32,7 @@ Output is written to ~/.sharedinbox-agent-logs/<session>-<timestamp>.log.
 To resume the Claude conversation, look up the session UUID first:
 
   scripts/agent_loop.py list          # shows NAME and UUID columns
-  claude --resume <uuid> --dangerously-skip-permissions   # use the UUID, NOT the session name
+  claude --resume <uuid>              # use the UUID, NOT the session name
 """
 
 import argparse
@@ -542,7 +542,7 @@ def cmd_list() -> int:
 
     sessions.sort(reverse=True)
     total = len(sessions)
-    print(f"  {'DATE':<16}  {'NAME':<20}  UUID  (use with: claude --resume <uuid> --dangerously-skip-permissions)")
+    print(f"  {'DATE':<16}  {'NAME':<20}  UUID  (use with: claude --resume <uuid>)")
     print(f"  {'-'*16}  {'-'*20}  {'-'*36}")
     for mtime, name, sid in sessions[:20]:
         ts = datetime.fromtimestamp(mtime).strftime("%Y-%m-%d %H:%M")
@@ -626,9 +626,9 @@ def _run_loop() -> int:
         session_name = state.get("session_name")
         uuid = _find_session_uuid(session_name) if session_name else None
         if uuid:
-            resume_cmd = f"claude --resume {shlex.quote(uuid)} --dangerously-skip-permissions"
+            resume_cmd = f"claude --resume {shlex.quote(uuid)}"
         elif session_name:
-            resume_cmd = f"claude --resume <uuid> --dangerously-skip-permissions  # run: scripts/agent_loop.py list"
+            resume_cmd = f"claude --resume <uuid>  # run: scripts/agent_loop.py list"
         else:
             resume_cmd = ""
         git_info = _git_summary()
@@ -657,7 +657,7 @@ def _run_loop() -> int:
         session_name = f"plan-issue-{pending_issue}"
         uuid = _find_session_uuid(session_name)
         if uuid:
-            resume_cmd = f"claude --resume {shlex.quote(uuid)} --dangerously-skip-permissions"
+            resume_cmd = f"claude --resume {shlex.quote(uuid)}"
             _comment_issue(
                 pending_issue,
                 f"Planning complete. To resume this session:\n\n```\n{resume_cmd}\n```",

scripts/test_agent_loop.py

@@ -714,7 +714,7 @@ class TestRunLoopResumeCommand(unittest.TestCase):
              contextlib.redirect_stdout(buf):
             agent_loop._run_loop()
         output = buf.getvalue()
-        self.assertIn(f"claude --resume {fake_uuid} --dangerously-skip-permissions", output)
+        self.assertIn(f"claude --resume {fake_uuid}", output)
 
     def test_resume_shows_list_hint_when_uuid_not_found(self):
         buf = io.StringIO()