feat(14-08): add cache settings API/store wiring for Settings integration

- Fix getCacheSettings/updateCacheSettings URLs to use /api/cloud/analysis/cache
  and /api/cloud/analysis/cache/settings (Rule 1: wrong URLs per Plan 14-03 backend)
- Add loadCacheSettings action: hydrates tierCapBytes, cacheUsage, cacheLimit,
  detailedAnalysisProgress, failureBehavior from server without clearing on error
- Add tierCapBytes, cacheUsage, cacheSettingsLoading, cacheSettingsError state
- updateCacheSettings merges full CacheStatusOut response into local state

frontend/src/api/cloud.js

@@ -354,19 +354,28 @@ export function retryAnalysisItem(jobId, itemId) {
 }
 
 /**
- * Get the current user cache settings.
+ * Get the current user cache status and analysis settings.
  *
- * Returns { cloud_cache_limit_bytes, ... }
+ * Returns CacheStatusOut: { entry_count, total_bytes, cache_limit_bytes,
+ *   tier_cap_bytes, analysis_progress_detail, analysis_failure_behavior }
+ *
+ * Never includes object_key, credentials_enc, or raw provider URLs (T-14-02/T-14-08).
  */
 export function getCacheSettings() {
-  return request('/api/users/me/settings')
+  return request('/api/cloud/analysis/cache')
 }
 
 /**
- * Update the current user cache settings.
+ * Update the current user analysis settings and/or cache limit.
  *
- * @param {{ cloud_cache_limit_bytes?: number }} params
+ * PATCH /api/cloud/analysis/cache/settings
+ * Body fields (all optional): cloud_cache_limit_bytes, analysis_progress_detail,
+ *   analysis_failure_behavior.
+ * Returns fresh CacheStatusOut after update.
+ *
+ * @param {{ cloud_cache_limit_bytes?: number, analysis_progress_detail?: boolean,
+ *            analysis_failure_behavior?: string }} params
  */
 export function updateCacheSettings(params) {
-  return jsonRequest('/api/users/me/settings', 'PATCH', params)
+  return jsonRequest('/api/cloud/analysis/cache/settings', 'PATCH', params)
 }

frontend/src/stores/cloudConnections.js

@@ -135,9 +135,34 @@ export const useCloudConnectionsStore = defineStore('cloudConnections', () => {
   /**
    * CACHE-04: User-configured cloud cache limit in bytes.
    * Default: 500 MB (500 * 1024 * 1024).
+   * Hydrated from server via loadCacheSettings — in-memory only, not persisted.
    */
   const cacheLimit = ref(500 * 1024 * 1024)
 
+  /**
+   * Server-authoritative tier cap for the cache limit in bytes.
+   * Loaded from GET /api/cloud/analysis/cache (tier_cap_bytes field).
+   * null until loadCacheSettings has run.
+   */
+  const tierCapBytes = ref(null)
+
+  /**
+   * Current aggregate cache usage from the server.
+   * Loaded from GET /api/cloud/analysis/cache.
+   * { entry_count: number, total_bytes: number } — no object_key or credentials.
+   */
+  const cacheUsage = ref(null)
+
+  /**
+   * Whether the last loadCacheSettings call is in flight.
+   */
+  const cacheSettingsLoading = ref(false)
+
+  /**
+   * Validation/network error from the last settings call, or null.
+   */
+  const cacheSettingsError = ref(null)
+
   /**
    * D-12: Connection health state map — single source for both browser compact status
    * and Settings full diagnostics.
@@ -525,17 +550,90 @@ export const useCloudConnectionsStore = defineStore('cloudConnections', () => {
     detailedAnalysisProgress.value = !!enabled
   }
 
+  /**
+   * CACHE-04: Load cache status and analysis settings from the server.
+   *
+   * Hydrates cacheLimit, tierCapBytes, cacheUsage, detailedAnalysisProgress,
+   * and failureBehavior from the authoritative backend state.
+   *
+   * Errors do not clear existing in-memory settings — cacheSettingsError is
+   * set so the UI can surface a controlled message.
+   */
+  async function loadCacheSettings() {
+    cacheSettingsLoading.value = true
+    cacheSettingsError.value = null
+    try {
+      const result = await api.getCacheSettings()
+      // Hydrate server-authoritative values into local state
+      if (result?.cache_limit_bytes !== undefined) {
+        cacheLimit.value = result.cache_limit_bytes
+      }
+      if (result?.tier_cap_bytes !== undefined) {
+        tierCapBytes.value = result.tier_cap_bytes
+      }
+      if (result?.entry_count !== undefined || result?.total_bytes !== undefined) {
+        cacheUsage.value = {
+          entry_count: result.entry_count ?? 0,
+          total_bytes: result.total_bytes ?? 0,
+        }
+      }
+      if (result?.analysis_progress_detail !== undefined) {
+        detailedAnalysisProgress.value = !!result.analysis_progress_detail
+      }
+      if (result?.analysis_failure_behavior !== undefined) {
+        failureBehavior.value = result.analysis_failure_behavior
+      }
+      return result
+    } catch (e) {
+      // Do not clear existing settings on error — surface a controlled message
+      cacheSettingsError.value = e?.message ?? 'Failed to load cache settings'
+      return null
+    } finally {
+      cacheSettingsLoading.value = false
+    }
+  }
+
   /**
    * CACHE-04: Update user cache settings via the API.
    *
-   * @param {{ cloud_cache_limit_bytes?: number }} params
+   * Merges server response back into local state after a successful update.
+   * Validation errors surface as a thrown error (caller responsible for display).
+   *
+   * @param {{ cloud_cache_limit_bytes?: number, analysis_progress_detail?: boolean,
+   *            analysis_failure_behavior?: string }} params
    */
   async function updateCacheSettings(params) {
-    const result = await api.updateCacheSettings(params)
-    if (result?.cloud_cache_limit_bytes !== undefined) {
-      cacheLimit.value = result.cloud_cache_limit_bytes
+    cacheSettingsError.value = null
+    try {
+      const result = await api.updateCacheSettings(params)
+      // Merge server response into local state
+      if (result?.cache_limit_bytes !== undefined) {
+        cacheLimit.value = result.cache_limit_bytes
+      }
+      if (result?.cloud_cache_limit_bytes !== undefined) {
+        cacheLimit.value = result.cloud_cache_limit_bytes
+      }
+      if (result?.tier_cap_bytes !== undefined) {
+        tierCapBytes.value = result.tier_cap_bytes
+      }
+      if (result?.entry_count !== undefined || result?.total_bytes !== undefined) {
+        cacheUsage.value = {
+          entry_count: result.entry_count ?? 0,
+          total_bytes: result.total_bytes ?? 0,
+        }
+      }
+      if (result?.analysis_progress_detail !== undefined) {
+        detailedAnalysisProgress.value = !!result.analysis_progress_detail
+      }
+      if (result?.analysis_failure_behavior !== undefined) {
+        failureBehavior.value = result.analysis_failure_behavior
+      }
+      return result
+    } catch (e) {
+      // Surface validation error without clearing existing settings
+      cacheSettingsError.value = e?.message ?? 'Failed to update cache settings'
+      throw e
     }
-    return result
   }
 
   return {
@@ -591,9 +689,15 @@ export const useCloudConnectionsStore = defineStore('cloudConnections', () => {
     retryItem,
     skipItem,
     cancelItem,
-    // User preferences
+    // User preferences and cache settings
     setFailureBehavior,
     setDetailedAnalysisProgress,
+    loadCacheSettings,
     updateCacheSettings,
+    // Server-authoritative cache state
+    tierCapBytes,
+    cacheUsage,
+    cacheSettingsLoading,
+    cacheSettingsError,
   }
 })