fix(street-level): /revmain cleanup after the slim rebuild

- Google 3D: the OPEN button re-measures a ground whose tiles are still
  loading (a few times, a second apart) and on a map change, not only
  after the next camera move.
- Mapillary: two mounts on one host during the first download share one
  build instead of leaking a second WebGL viewer.
- Retired floating-panel keys (v8 panelPos, panelFloatHintShown) are
  dropped from localStorage; dead inline-position resets, the drag JSDoc
  and the dead qa-ui-disposal observer branch are gone.
- Docs: z ladder, panel chrome, position storage and the fixture gate's
  actual coverage; changelog fragment for #974 (old .gev-cache/mapillary
  can be deleted).
- ru/es: the layer is named as everywhere else in the UI.
- Fixtures and test fakes: unused exports removed; a fake credit removal
  of an absent credit no longer drops another one; the tile test reset
  frees upstream slots.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/ui/applicationShell.js

@@ -53,8 +53,7 @@ import { applyLocaleChoice, mountLocalePicker } from './localePicker.js';
  * Responsibilities:
  * - Visual controls and presets backed by the VisualEffects controller.
  * - Bloom and sharpen post-processing toggle/intensity control.
- * - Draggable/collapsible panel system with localStorage persistence,
- *   z-order stacking, and viewport-clamped positioning.
+ * - Collapsible rail panels with their collapsed state kept in localStorage.
  * - CCTV panel: camera selection, coverage toggle, projection, calibration
  *   sliders, auto-hop, and summary typewriter effect.
  * - Location bar with city/POI preset pills, QWERTY key navigation,
@@ -1204,19 +1203,6 @@ export class StyleManager extends ShellFacade {
     return true;
   }
 
-  /**
-   * Makes a panel draggable via its handle element. Implements:
-   * - Z-order promotion: each pointerdown increments the global z-counter
-   *   so the clicked panel floats above siblings.
-   * - Viewport clamping: drag moves are clamped to a 6px inset from all edges.
-   * - Right-rail pinning: pp-toggles panel is re-anchored right after drag.
-   * - CCTV viewport sync: cctv-panel recalculates scroll height after drag.
-   * @param {string} panelId - DOM id of the panel.
-   * @param {HTMLElement} panelEl - The panel DOM element.
-   * @param {HTMLElement} handleEl - The drag handle element within the panel.
-   * @returns {void}
-   */
-
   /**
    * Programmatically collapses or expands a panel, persists the state,
    * and triggers layout recalculation for dependent panels.

src/ui/panelLayoutController.js

@@ -189,12 +189,6 @@ export class PanelLayoutController {
     const stack = this._rightPanelStack;
     if (!stack || !this._ppToggles) return;
 
-    this._ppToggles.style.removeProperty('top');
-    this._ppToggles.style.removeProperty('right');
-    this._ppToggles.style.removeProperty('bottom');
-    this._ppToggles.style.removeProperty('left');
-    this._ppToggles.style.removeProperty('z-index');
-    this._ppToggles.querySelector('.pp-header-row')?.removeAttribute('title');
     stack.prepend(this._ppToggles);
     const globalContextPanel = document.getElementById('global-context-panel');
     for (const panel of [
@@ -204,8 +198,6 @@ export class PanelLayoutController {
       this._streetLevelPanel,
     ]) {
       if (!panel) continue;
-      for (const property of ['top', 'right', 'bottom', 'left', 'z-index'])
-        panel.style.removeProperty(property);
       stack.insertBefore(panel, globalContextPanel);
       this._syncPanelCollapseButton(panel);
     }

src/ui/panelPositionControls.js

@@ -8,6 +8,11 @@ const PANEL_LAYOUT_STORAGE_VERSION = 'v6';
  * the layout-reset notice and the documented key.
  */
 const PANEL_POSITION_STORAGE_VERSION = 'v8';
+/** Floating panels' stored positions and hint flag: nothing reads them now. */
+const RETIRED_PANEL_KEY_PREFIXES = [
+  `godsEyeView.${PANEL_POSITION_STORAGE_VERSION}.panelPos.`,
+  `godsEyeView.${PANEL_POSITION_STORAGE_VERSION}.panelFloatHintShown`,
+];
 export class PanelPositionControls {
   constructor({ syncPanelCollapseButton, showToast }) {
     this._syncPanelCollapseButton = syncPanelCollapseButton;
@@ -15,6 +20,7 @@ export class PanelPositionControls {
   }
 
   _maybeNotifyLayoutReset() {
+    this._dropRetiredPanelKeys();
     try {
       const marker = `godsEyeView.${PANEL_POSITION_STORAGE_VERSION}.layoutResetNotified`;
       if (localStorage.getItem(marker)) return;
@@ -32,6 +38,16 @@ export class PanelPositionControls {
     }
   }
 
+  _dropRetiredPanelKeys() {
+    try {
+      for (const key of Object.keys(localStorage))
+        if (RETIRED_PANEL_KEY_PREFIXES.some((prefix) => key.startsWith(prefix)))
+          localStorage.removeItem(key);
+    } catch {
+      // storage unavailable
+    }
+  }
+
   _panelCollapseStorageKey(panelId) {
     return `godsEyeView.${PANEL_LAYOUT_STORAGE_VERSION}.panelCollapsed.${panelId}`;
   }

src/ui/panelPositionControls.test.mjs

@@ -0,0 +1,34 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { PanelPositionControls } from './panelPositionControls.js';
+
+/** A localStorage stand-in whose keys enumerate like the real one. */
+function fakeStorage(entries) {
+  const storage = {};
+  Object.defineProperties(storage, {
+    getItem: { value: (key) => (key in storage ? storage[key] : null) },
+    setItem: { value: (key, value) => (storage[key] = String(value)) },
+    removeItem: { value: (key) => delete storage[key] },
+  });
+  Object.assign(storage, entries);
+  return storage;
+}
+
+test('the floating panels’ stored positions and hint flag are dropped; collapse state stays', (t) => {
+  const saved = globalThis.localStorage;
+  globalThis.localStorage = fakeStorage({
+    'godsEyeView.v8.panelPos.cctv-panel': '{"x":1}',
+    'godsEyeView.v8.panelFloatHintShown': '1',
+    'godsEyeView.v6.panelCollapsed.cctv-panel': '1',
+    'godsEyeView.v8.layoutResetNotified': '1',
+  });
+  t.after(() => {
+    globalThis.localStorage = saved;
+  });
+  const controls = new PanelPositionControls({ showToast() {} });
+  controls._maybeNotifyLayoutReset();
+  assert.deepEqual(Object.keys(globalThis.localStorage).sort(), [
+    'godsEyeView.v6.panelCollapsed.cctv-panel',
+    'godsEyeView.v8.layoutResetNotified',
+  ]);
+});

src/ui/shellLifecycle.test.mjs

@@ -228,7 +228,7 @@ test('recording restores the original HUD after repeated entry and revokes retai
   }
 });
 
-test('weather rail orders between CCTV and Context, resets positions, observes and syncs chrome', (t) => {
+test('weather rail orders between CCTV and Context, observes and syncs chrome', (t) => {
   const f = fixture();
   const observed = new Set();
   const previousResizeObserver = globalThis.ResizeObserver;
@@ -263,16 +263,7 @@ test('weather rail orders between CCTV and Context, resets positions, observes a
     ]) {
       const panel = f.nodes.get(id) || f.element();
       panel.id = id;
-      const positions = new Map(
-        ['top', 'right', 'bottom', 'left', 'z-index'].map((key) => [
-          key,
-          '20px',
-        ]),
-      );
-      panel.style = {
-        removeProperty: (key) => positions.delete(key),
-        positions,
-      };
+      panel.style = {};
       panel.classList.add('collapsed');
       const button = f.element();
       button.closest = () => panel;
@@ -307,7 +298,6 @@ test('weather rail orders between CCTV and Context, resets positions, observes a
     );
     assert.ok(synced.includes('weather-panel'));
     assert.ok(observed.has(weather));
-    assert.equal(weather.style.positions.size, 0);
     assert.equal(weather.button.textContent, '◀');
     assert.equal(weather.button.getAttribute('aria-expanded'), 'false');
     assert.equal(weather.button.title, 'Expand WEATHER');

src/ui/styles/foundation.css

@@ -381,7 +381,7 @@ body.cockpit-mode #cockpit-cloud-effects.active {
   position: fixed;
   right: 36px;
   bottom: 36px;
-  /* Z ladder: panels 100-139, voice pill 150, toast 200, clean-view-exit 300 */
+  /* Z ladder: panels ~100, voice pill 150, toast 200, clean-view-exit 300 */
   z-index: 150;
   display: flex;
   align-items: center;