fix(dashboard): drop terminated-state leftovers and AgentListModal duplicate Resume

Removes no-op `agents.filter((a) => true)` calls (a leftover from the
terminated AgentState refactor) flagged by eslint and updates affected
tests and fixtures so `terminated` is no longer referenced. Also:

- Deletes the duplicate `state === "paused"` render branch in
  AgentListModal list view that produced two "Resume" buttons.
- Updates the AgentDetailView help text to reflect the current
  deletable states ("idle or paused").
- Aligns the bundled-plugin-install test with the new auto-load
  behavior for already-installed enabled plugins.

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

packages/dashboard/app/components/InlineCreateCard.tsx

@@ -926,7 +926,7 @@ export function InlineCreateCard({
                 <div className="dep-dropdown agent-picker-dropdown" onMouseDown={(e) => e.preventDefault()}>
                   <div className="dep-dropdown-search-header">Select agent</div>
                   {agentsLoading && <div className="dep-dropdown-empty">Loading agents...</div>}
-                  {!agentsLoading && agents.filter((a) => true).map((a) => (
+                  {!agentsLoading && agents.map((a) => (
                     <div
                       key={a.id}
                       className={`dep-dropdown-item${selectedAgentId === a.id ? " selected" : ""}`}
@@ -941,7 +941,7 @@ export function InlineCreateCard({
                       <span className="dep-dropdown-title">{a.name}</span>
                     </div>
                   ))}
-                  {!agentsLoading && agents.filter((a) => true).length === 0 && (
+                  {!agentsLoading && agents.length === 0 && (
                     <div className="dep-dropdown-empty">No agents available</div>
                   )}
                   {selectedAgentId && (