Revert "fix(ui): improve routine properties panel and history UX" (#5723)

## Thinking Path

> - Paperclip orchestrates AI agents through visible, governable task
and routine workflows.
> - The routines UI includes the routine detail page, properties panel,
history tab, and shared sidebar components.
> - PR #5703 changed that workflow by widening the routine properties
panel and moving revision inspection/comparison into dialogs.
> - The product direction for that change is being paused for now, so
the safest path is a direct revert instead of partial edits.
> - This pull request reverts merge commit
`74cb560c41305ac3283067d1ec8d3060ffdc28cb` from #5703.
> - The benefit is restoring the prior routines UI behavior while
keeping the revert easy to review and re-apply later if needed.

## What Changed

- Reverted #5703: `fix(ui): improve routine properties panel and history
UX`.
- Restored the previous routine properties panel sizing, panel context
API, routine detail layout, and routine history rendering behavior.
- Removed the reverted sidebar pane test additions and restored the
previous focused routine history test expectations.

## Verification

- `git diff --check origin/master..HEAD`
- `pnpm vitest run ui/src/components/RoutineHistoryTab.test.tsx`
- `pnpm --filter @paperclipai/ui typecheck`

### Screenshots

This is a direct revert of #5703. The visual state after this PR
corresponds to the "Before" screenshots from #5703, and the state being
removed corresponds to the "After" screenshots from #5703.

#### Trigger Panel Width

| Before this revert | After this revert |
| --- | --- |
| <img width="1742" height="1288" alt="triggers-before-this-revert"
src="https://github.com/user-attachments/assets/9e818978-283c-49a3-9401-879be550c67b"
/> | <img width="1741" height="1289" alt="triggers-after-this-revert"
src="https://github.com/user-attachments/assets/2a391769-c355-4219-8da3-d1ea18698430"
/> |

#### History Panel

| Before this revert | After this revert |
| --- | --- |
| <img width="1741" height="1290" alt="history-before-this-revert"
src="https://github.com/user-attachments/assets/4c139238-8494-4438-89e1-4277d05bc3aa"
/> | <img width="1739" height="1289" alt="history-after-this-revert"
src="https://github.com/user-attachments/assets/eaea4f3d-bb65-4af6-b67f-3ba3026fe0c9"
/> |

## Risks

- Low technical risk: this is a clean Git revert of a recently merged
UI-only PR.
- Product risk: the routine properties panel and revision history return
to the older, narrower workflow that #5703 was improving.
- Re-application risk: future work that wants the #5703 behavior back
should re-apply it deliberately rather than cherry-picking around this
revert.

> 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, GPT-5 coding agent, tool-enabled with local shell and
GitHub CLI access. Context window size was 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
- [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/context/PanelContext.tsx

@@ -2,23 +2,10 @@ import { createContext, useCallback, useContext, useState, type ReactNode } from
 
 const STORAGE_KEY = "paperclip:panel-visible";
 
-export interface PanelLayoutOptions {
-  /** localStorage key under which the user's preferred panel width is saved. */
-  storageKey?: string;
-  /** Width applied when no stored value exists. */
-  defaultWidth?: number;
-  minWidth?: number;
-  maxWidth?: number;
-  /** Below this viewport width, clamp the panel to compactMaxWidth. */
-  compactBelowViewport?: number;
-  compactMaxWidth?: number;
-}
-
 interface PanelContextValue {
   panelContent: ReactNode | null;
-  panelLayout: PanelLayoutOptions;
   panelVisible: boolean;
-  openPanel: (content: ReactNode, layout?: PanelLayoutOptions) => void;
+  openPanel: (content: ReactNode) => void;
   closePanel: () => void;
   setPanelVisible: (visible: boolean) => void;
   togglePanelVisible: () => void;
@@ -43,21 +30,16 @@ function writePreference(visible: boolean) {
   }
 }
 
-const EMPTY_LAYOUT: PanelLayoutOptions = {};
-
 export function PanelProvider({ children }: { children: ReactNode }) {
   const [panelContent, setPanelContent] = useState<ReactNode | null>(null);
-  const [panelLayout, setPanelLayout] = useState<PanelLayoutOptions>(EMPTY_LAYOUT);
   const [panelVisible, setPanelVisibleState] = useState(readPreference);
 
-  const openPanel = useCallback((content: ReactNode, layout?: PanelLayoutOptions) => {
+  const openPanel = useCallback((content: ReactNode) => {
     setPanelContent(content);
-    setPanelLayout(layout ?? EMPTY_LAYOUT);
   }, []);
 
   const closePanel = useCallback(() => {
     setPanelContent(null);
-    setPanelLayout(EMPTY_LAYOUT);
   }, []);
 
   const setPanelVisible = useCallback((visible: boolean) => {
@@ -75,7 +57,7 @@ export function PanelProvider({ children }: { children: ReactNode }) {
 
   return (
     <PanelContext.Provider
-      value={{ panelContent, panelLayout, panelVisible, openPanel, closePanel, setPanelVisible, togglePanelVisible }}
+      value={{ panelContent, panelVisible, openPanel, closePanel, setPanelVisible, togglePanelVisible }}
     >
       {children}
     </PanelContext.Provider>