fix(teams): clear stale current_team_id when membership ends

Reset the user's persisted current_team_id when they are removed from
a team, when their team is deleted, or when refreshSession finds no
team left, so a dangling reference is never restored on next login.

app/Actions/Team/DeleteTeam.php

@@ -50,6 +50,7 @@ public function handle(Team $team, User $user): ?Team
                 ->get()
                 ->each(function (User $member) use ($team): void {
                     $member->teams()->detach($team);
+                    $member->clearStoredTeamIfMatches($team->id);
                     DB::table('sessions')->where('user_id', $member->id)->delete();
                 });
 

app/Livewire/Team/Member.php

@@ -89,6 +89,7 @@ public function remove()
             DB::transaction(function () use ($teamId): void {
                 $this->member->teams()->detach($teamId);
                 RevokeUserTeamTokens::forUserTeam($this->member, $teamId);
+                $this->member->clearStoredTeamIfMatches($teamId);
             });
             // Clear cache for the removed user - both old and new key formats
             Cache::forget("team:{$this->member->id}");

app/Models/User.php

@@ -401,6 +401,21 @@ public function resolveStoredTeam(): ?Team
         return null;
     }
 
+    /**
+     * Reset the persisted active team when it points to the given team.
+     *
+     * Called when the user is removed from a team (or the team is deleted) so a
+     * stale current_team_id can never be trusted after the fact. Read paths
+     * already re-validate membership; this is defense-in-depth that clears the
+     * dangling value at the source event instead of relying on self-healing.
+     */
+    public function clearStoredTeamIfMatches(int $teamId): void
+    {
+        if ($this->current_team_id === $teamId) {
+            $this->forceFill(['current_team_id' => null])->saveQuietly();
+        }
+    }
+
     public function role(): ?string
     {
         if (data_get($this, 'pivot')) {

bootstrap/helpers/shared.php

@@ -581,8 +581,13 @@ function refreshSession(?Team $team = null): void
     if (! $team) {
         // The user has no team left (e.g. just deleted their current team and
         // belongs to no other): clear the stale session reference instead of
-        // dereferencing null.
+        // dereferencing null, and drop the persisted choice so it is not
+        // restored on next login.
         session()->forget('currentTeam');
+        $user = Auth::user();
+        if ($user && ! is_null($user->current_team_id)) {
+            $user->forceFill(['current_team_id' => null])->saveQuietly();
+        }
 
         return;
     }

tests/Feature/Team/ActiveTeamPersistenceTest.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Actions\Team\DeleteTeam;
 use App\Livewire\SelectTeam;
 use App\Models\InstanceSettings;
 use App\Models\Team;
@@ -128,6 +129,38 @@ function userWithTwoTeams(): array
     expect($response->headers->get('Location'))->not->toBe(route('team.select'));
 });
 
+it('clears the stored team when the member is removed from it', function () {
+    [$user, , $second] = userWithTwoTeams();
+    $user->update(['current_team_id' => $second->id]);
+
+    // Simulate the removal event (Team\Member::remove detaches then clears).
+    $user->teams()->detach($second->id);
+    $user->clearStoredTeamIfMatches($second->id);
+
+    expect($user->fresh()->current_team_id)->toBeNull();
+});
+
+it('keeps the stored team when the member is removed from a different team', function () {
+    [$user, $personal, $second] = userWithTwoTeams();
+    $user->update(['current_team_id' => $second->id]);
+
+    $user->teams()->detach($personal->id);
+    $user->clearStoredTeamIfMatches($personal->id);
+
+    expect($user->fresh()->current_team_id)->toBe($second->id);
+});
+
+it('clears the stored team for members when their team is deleted', function () {
+    [$owner, , $shared] = userWithTwoTeams();
+    $member = User::factory()->create();
+    $member->teams()->attach($shared, ['role' => 'member']);
+    $member->update(['current_team_id' => $shared->id]);
+
+    app(DeleteTeam::class)->handle($shared->fresh(), $owner);
+
+    expect($member->fresh()->current_team_id)->toBeNull();
+});
+
 it('bounces users who already have an active team away from the select screen', function () {
     [$user, , $second] = userWithTwoTeams();
     $user->update(['current_team_id' => $second->id]);