Polish operator UI task controls (#5427)

## Thinking Path

> - Paperclip orchestrates AI agents for zero-human companies
> - Operators spend most of their day scanning skills, routines, inbox
groups, and activity cards
> - Several small UI rough edges made those surfaces harder to scan or
easier to crash on real API payloads
> - These fixes are grouped together because they are low-risk operator
quality-of-life improvements rather than separate control-plane
contracts
> - This pull request polishes skills metadata, routine run-now access,
grouped issue creation defaults, monitor activity rendering, and
activity row identity layout
> - The benefit is a smoother board workflow with fewer small
interruptions while keeping the change set compact

## What Changed

- Improves company skill source display and the used-by agent list.
- Truncates long skill source paths and adds a copy affordance.
- Adds a row-level run-now button to the routines table.
- Adds grouped issue creation defaults for inbox issue groups and aligns
grouped add buttons to the right.
- Fixes `IssueMonitorActivityCard` when `monitorNextCheckAt` arrives as
an ISO string.
- Polishes activity row actor avatar/name layout by using the shared
avatar primitive.

## Verification

- `pnpm run preflight:workspace-links && pnpm exec vitest run
ui/src/pages/Routines.test.tsx ui/src/components/IssuesList.test.tsx
ui/src/lib/inbox.test.ts
ui/src/components/IssueMonitorActivityCard.test.tsx` — 91 passed.
- The routines test emitted the pre-existing Radix warning about missing
`DialogTitle`/description in dialog content; tests still passed.
- Pairwise merge checks against the other two PR branches reported no
textual conflicts.

## Risks

- Low: changes are UI-focused and covered by targeted component/lib
tests.
- Low-to-medium: activity row layout changes could affect dense feed
scanability; the implementation uses the shared avatar component and
keeps truncation behavior.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex coding agent, GPT-5 model family (`gpt-5`), tool-enabled
Paperclip heartbeat environment. Context window and internal reasoning
mode are not exposed by the runtime.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

ui/src/lib/inbox.test.ts

@@ -13,6 +13,7 @@ import type {
 import {
   DEFAULT_INBOX_ISSUE_COLUMNS,
   buildGroupedInboxSections,
+  buildInboxIssueGroupCreateDefaults,
   buildInboxKeyboardNavEntries,
   buildInboxDismissedAtByKey,
   computeInboxBadgeData,
@@ -1379,6 +1380,61 @@ describe("inbox helpers", () => {
     ]);
   });
 
+  it("builds new issue defaults from inbox project, assignee, and workspace groups", () => {
+    const projectIssue = makeIssue("project", true);
+    projectIssue.projectId = "project-1";
+
+    const executionIssue = makeIssue("exec", false);
+    executionIssue.projectId = "project-1";
+    executionIssue.projectWorkspaceId = "project-workspace-1";
+    executionIssue.executionWorkspaceId = "execution-workspace-1";
+
+    const agentIssue = makeIssue("agent", false);
+    agentIssue.assigneeAgentId = "agent-1";
+
+    const options = {
+      executionWorkspaceById: new Map([
+        [
+          "execution-workspace-1",
+          {
+            name: "Feature Branch",
+            mode: "isolated_workspace" as const,
+            projectWorkspaceId: "project-workspace-1",
+          },
+        ],
+      ]),
+      projectWorkspaceById: new Map([
+        ["project-workspace-1", { name: "Primary workspace", projectId: "project-1" }],
+      ]),
+    };
+
+    expect(buildInboxIssueGroupCreateDefaults(
+      "project:project-1",
+      "project",
+      [{ kind: "issue", timestamp: 1, issue: projectIssue }],
+      options,
+    )).toEqual({ projectId: "project-1" });
+
+    expect(buildInboxIssueGroupCreateDefaults(
+      "workspace:execution:execution-workspace-1",
+      "workspace",
+      [{ kind: "issue", timestamp: 1, issue: executionIssue }],
+      options,
+    )).toEqual({
+      executionWorkspaceId: "execution-workspace-1",
+      executionWorkspaceMode: "reuse_existing",
+      projectId: "project-1",
+      projectWorkspaceId: "project-workspace-1",
+    });
+
+    expect(buildInboxIssueGroupCreateDefaults(
+      "assignee:agent:agent-1",
+      "assignee",
+      [{ kind: "issue", timestamp: 1, issue: agentIssue }],
+      options,
+    )).toEqual({ assigneeAgentId: "agent-1" });
+  });
+
   it("persists inbox grouping preferences", () => {
     saveInboxWorkItemGroupBy("workspace");
     expect(loadInboxWorkItemGroupBy()).toBe("workspace");