refactor(tags): remove tag entity and all references

Drops TagEntity, TagRepository, and tag wiring across data layer, worker,
and UI. Adds RemoveTags migration to clean up schema.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Ui/Views/Islands/AgentStripView.axaml

@@ -42,13 +42,22 @@
           <PathIcon Data="{StaticResource Icon.X}" Width="12" Height="12"
                     Foreground="{DynamicResource BloodBrush}"/>
         </Button>
-        <!-- Hand off button — only when idle -->
+        <!-- Send to queue — only when idle -->
         <Button Grid.Column="3"
                 Classes="btn accent"
-                Content="Hand off"
-                Command="{Binding RunNowCommand}"
-                IsVisible="{Binding !IsRunning}"
-                ToolTip.Tip="Hand task off to Claude"
+                Content="Send to queue"
+                Command="{Binding EnqueueCommand}"
+                IsVisible="{Binding IsIdle}"
+                ToolTip.Tip="Queue this task for the worker to pick up"
+                VerticalAlignment="Center"
+                Padding="10,4"/>
+        <!-- Remove from queue — only when queued -->
+        <Button Grid.Column="3"
+                Classes="btn"
+                Content="Remove from queue"
+                Command="{Binding DequeueCommand}"
+                IsVisible="{Binding IsQueued}"
+                ToolTip.Tip="Take this task back out of the queue"
                 VerticalAlignment="Center"
                 Padding="10,4"/>
       </Grid>
@@ -144,14 +153,14 @@
         <Button Classes="btn accent"
                 Content="Continue"
                 Command="{Binding ContinueCommand}"
-                IsVisible="{Binding ShowFailedActions}"
-                ToolTip.Tip="Resume the task from where it failed"
+                IsVisible="{Binding ShowContinue}"
+                ToolTip.Tip="Resume the last session and keep going"
                 Padding="10,4"/>
         <Button Classes="btn"
-                Content="Reset"
-                Command="{Binding ResetCommand}"
-                IsVisible="{Binding ShowFailedActions}"
-                ToolTip.Tip="Discard the worktree and move the task back to Manual"
+                Content="Reset &amp; retry"
+                Command="{Binding ResetAndRetryCommand}"
+                IsVisible="{Binding ShowResetAndRetry}"
+                ToolTip.Tip="Discard the worktree and re-queue the task to run from scratch"
                 Padding="10,4"/>
       </StackPanel>