[codex] Respect manual workspace runtime controls (#4125)

## Thinking Path

> - Paperclip orchestrates AI agents inside execution and project
workspaces
> - Workspace runtime services can be controlled manually by operators
and reused by agent runs
> - Manual start/stop state was not preserved consistently across
workspace policies and routine launches
> - Routine launches also needed branch/workspace variables to default
from the selected workspace context
> - This pull request makes runtime policy state explicit, preserves
manual control, and auto-fills routine branch variables from workspace
data
> - The benefit is less surprising workspace service behavior and fewer
manual inputs when running workspace-scoped routines

## What Changed

- Added runtime-state handling for manual workspace control across
execution and project workspace validators, routes, and services.
- Updated heartbeat/runtime startup behavior so manually stopped
services are respected.
- Auto-filled routine workspace branch variables from available
workspace context.
- Added focused server and UI tests for workspace runtime and routine
variable behavior.
- Removed muted gray background styling from workspace pages and cards
for a cleaner workspace UI.

## Verification

- `pnpm install --frozen-lockfile --ignore-scripts`
- `pnpm exec vitest run server/src/__tests__/routines-service.test.ts
server/src/__tests__/workspace-runtime.test.ts
ui/src/components/RoutineRunVariablesDialog.test.tsx`
- Result: 55 tests passed, 21 skipped. The embedded Postgres routines
tests skipped on this host with the existing PGlite/Postgres init
warning; workspace-runtime and UI tests passed.

## Risks

- Medium risk: this touches runtime service start/stop policy and
heartbeat launch behavior.
- The focused tests cover manual runtime state, routine variables, and
workspace runtime reuse paths.

> 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 based on GPT-5, tool-enabled local shell and
GitHub workflow, exact runtime context window not exposed in this
session.

## 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, or documented why targeted component/service verification
is sufficient here
- [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/pages/ExecutionWorkspaceDetail.tsx

@@ -709,7 +709,7 @@ export function ExecutionWorkspaceDetail() {
 
                 <div className="space-y-4">
                   <div className="text-xs font-medium uppercase tracking-widest text-muted-foreground">Runtime config</div>
-                  <div className="rounded-md border border-dashed border-border/70 bg-muted/30 px-4 py-3">
+                  <div className="rounded-md border border-dashed border-border/70 bg-background px-4 py-3">
                     <div className="flex flex-col gap-3 sm:flex-row sm:flex-wrap sm:items-center sm:justify-between">
                       <div className="space-y-1">
                         <div className="text-sm font-medium text-foreground">
@@ -741,7 +741,7 @@ export function ExecutionWorkspaceDetail() {
                     </div>
                   </div>
 
-                  <details className="rounded-md border border-dashed border-border/70 bg-muted/30 px-4 py-3">
+                  <details className="rounded-md border border-dashed border-border/70 bg-background px-4 py-3">
                     <summary className="cursor-pointer text-sm font-medium">Advanced runtime JSON</summary>
                     <p className="mt-2 text-sm text-muted-foreground">
                       Override the inherited workspace command model only when this execution workspace truly needs different service or job behavior.
@@ -913,7 +913,7 @@ export function ExecutionWorkspaceDetail() {
             ) : workspaceOperationsQuery.data && workspaceOperationsQuery.data.length > 0 ? (
               <div className="space-y-3">
                 {workspaceOperationsQuery.data.map((operation) => (
-                  <div key={operation.id} className="rounded-md border border-border/80 bg-muted/30 px-4 py-3">
+                  <div key={operation.id} className="rounded-md border border-border/80 bg-background px-4 py-3">
                     <div className="flex flex-col gap-3 sm:flex-row sm:items-start sm:justify-between">
                       <div className="space-y-1">
                         <div className="text-sm font-medium">{operation.command ?? operation.phase}</div>

ui/src/pages/ProjectWorkspaceDetail.tsx

@@ -545,7 +545,7 @@ export function ProjectWorkspaceDetail() {
                 </Field>
               </div>
 
-              <details className="rounded-xl border border-dashed border-border/70 bg-muted/20 px-3 py-3">
+              <details className="rounded-xl border border-dashed border-border/70 bg-background px-3 py-3">
                 <summary className="cursor-pointer text-sm font-medium">Advanced runtime JSON</summary>
                 <p className="mt-2 text-sm text-muted-foreground">
                   Paperclip derives Services and Jobs from this JSON. Prefer editing named commands first; use raw JSON for advanced lifecycle, port, readiness, or environment settings.