feat: Phase 2 — store audit, migration clusters, ADR, settings domain migration

- MIGRATION_CLUSTERS.md: reactive dependency graph across 20 bridges/stores
- PHASE1_STORE_AUDIT.md: 11 stores audited (3 clean, 5 bridge-dependent, 3 platform-specific)
- ADR-001: dual-stack binding strategy (accepted, S-1+S-3 hybrid)
- Settings domain migration: all 6 settings components + App.svelte + FilesTab
  migrated from settings-bridge to getBackend() calls

src/App.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import { initTheme } from './lib/stores/theme.svelte';
-  import { getSetting } from './lib/adapters/settings-bridge';
+  import { getSetting } from './lib/stores/settings-store.svelte';
   import { isDetachedMode, getDetachedConfig } from './lib/utils/detach';
   import { startAgentDispatcher, stopAgentDispatcher } from './lib/agent-dispatcher';
   import { startHealthTick, stopHealthTick, clearHealthTracking } from './lib/stores/health.svelte';

src/lib/adapters/settings-bridge.ts

@@ -1,13 +0,0 @@
-import { invoke } from '@tauri-apps/api/core';
-
-export async function getSetting(key: string): Promise<string | null> {
-  return invoke('settings_get', { key });
-}
-
-export async function setSetting(key: string, value: string): Promise<void> {
-  return invoke('settings_set', { key, value });
-}
-
-export async function listSettings(): Promise<[string, string][]> {
-  return invoke('settings_list');
-}

src/lib/components/Workspace/FilesTab.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { listDirectoryChildren, readFileContent, writeFileContent, type DirEntry, type FileContent } from '../../adapters/files-bridge';
-  import { getSetting } from '../../adapters/settings-bridge';
+  import { getSetting } from '../../stores/settings-store.svelte';
   import { convertFileSrc } from '@tauri-apps/api/core';
   import CodeEditor from './CodeEditor.svelte';
   import PdfViewer from './PdfViewer.svelte';

src/lib/components/Workspace/SettingsTab.svelte

@@ -18,7 +18,7 @@
   import { deriveIdentifier, type GroupAgentRole, AGENT_ROLE_ICONS } from '../../types/groups';
   import { ProjectId, GroupId } from '../../types/ids';
   import { generateAgentPrompt } from '../../utils/agent-prompts';
-  import { getSetting, setSetting } from '../../adapters/settings-bridge';
+  import { getSetting, setSetting } from '../../stores/settings-store.svelte';
   import { getCurrentTheme, setTheme } from '../../stores/theme.svelte';
   import { THEME_LIST, getPalette, type ThemeId } from '../../styles/themes';
   import { listProfiles, type ClaudeProfile } from '../../adapters/claude-bridge';

src/lib/settings/categories/AdvancedSettings.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { onMount } from 'svelte';
-  import { getSetting, setSetting } from '../../adapters/settings-bridge';
+  import { getSetting, setSetting } from '../../stores/settings-store.svelte';
   import { getPluginEntries, setPluginEnabled, reloadAllPlugins } from '../../stores/plugins.svelte';
   import { checkForUpdates, getCurrentVersion, getLastCheckTimestamp } from '../../utils/updater';
   import type { UpdateInfo } from '../../utils/updater';

src/lib/settings/categories/AgentSettings.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { onMount } from 'svelte';
-  import { getSetting, setSetting } from '../../adapters/settings-bridge';
+  import { getSetting, setSetting } from '../../stores/settings-store.svelte';
   import { getProviders } from '../../providers/registry.svelte';
   import type { ProviderSettings } from '../../providers/types';
   import { invoke } from '@tauri-apps/api/core';

src/lib/settings/categories/AppearanceSettings.svelte

@@ -2,7 +2,7 @@
   import { onMount } from 'svelte';
   import { getCurrentTheme, setTheme, setCustomTheme } from '../../stores/theme.svelte';
   import { THEME_LIST, getPalette, type ThemeId } from '../../styles/themes';
-  import { getSetting, setSetting } from '../../adapters/settings-bridge';
+  import { getSetting, setSetting } from '../../stores/settings-store.svelte';
   import { handleError } from '../../utils/handle-error';
   import { type CustomTheme, loadCustomThemes, deleteCustomTheme as deleteCustom, saveCustomThemes } from '../../styles/custom-themes';
   import ThemeEditor from '../ThemeEditor.svelte';

src/lib/settings/categories/OrchestrationSettings.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { onMount } from 'svelte';
-  import { getSetting, setSetting } from '../../adapters/settings-bridge';
+  import { getSetting, setSetting } from '../../stores/settings-store.svelte';
   import { ANCHOR_BUDGET_SCALES, ANCHOR_BUDGET_SCALE_LABELS, type AnchorBudgetScale } from '../../types/anchors';
   import { WAKE_STRATEGIES, WAKE_STRATEGY_LABELS, WAKE_STRATEGY_DESCRIPTIONS, type WakeStrategy } from '../../types/wake';
   import { handleError, handleInfraError } from '../../utils/handle-error';

src/lib/settings/categories/ProjectSettings.svelte

@@ -6,7 +6,7 @@
     addProject, removeProject, addGroup, removeGroup, switchGroup,
     updateProject,
   } from '../../stores/workspace.svelte';
-  import { getSetting } from '../../adapters/settings-bridge';
+  import { getSetting } from '../../stores/settings-store.svelte';
   import { setActiveProject } from '../../stores/settings-scope.svelte';
 
   let newGroupName = $state('');

src/lib/settings/categories/SecuritySettings.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { onMount } from 'svelte';
-  import { getSetting, setSetting } from '../../adapters/settings-bridge';
+  import { getSetting, setSetting } from '../../stores/settings-store.svelte';
   import { storeSecret, getSecret, deleteSecret, listSecrets, hasKeyring, knownSecretKeys, SECRET_KEY_LABELS } from '../../adapters/secrets-bridge';
   import { handleError, handleInfraError } from '../../utils/handle-error';
 

src/lib/stores/plugins.svelte.ts

@@ -5,7 +5,7 @@
 
 import type { PluginMeta } from '../adapters/plugins-bridge';
 import { discoverPlugins } from '../adapters/plugins-bridge';
-import { getSetting, setSetting } from '../adapters/settings-bridge';
+import { getSetting, setSetting } from './settings-store.svelte';
 import { loadPlugin, unloadPlugin, unloadAllPlugins, getLoadedPlugins } from '../plugins/plugin-host';
 import { handleInfraError } from '../utils/handle-error';
 import type { GroupId, AgentId } from '../types/ids';

src/lib/stores/settings-scope.svelte.ts

@@ -2,7 +2,7 @@
 // Provides scoped get/set: reads project-level override if exists, falls back to global.
 // Single source of truth for which scope is active and how overrides cascade.
 
-import { getSetting, setSetting } from '../adapters/settings-bridge';
+import { getSetting, setSetting } from './settings-store.svelte';
 
 type Scope = 'global' | 'project';
 

src/lib/stores/settings-store.svelte.ts

@@ -0,0 +1,31 @@
+// Settings store — thin accessor over BackendAdapter for settings persistence.
+// Replaces the old settings-bridge.ts (which imported Tauri invoke directly).
+// All consumers should import from here instead of settings-bridge.
+
+import { getBackend } from '../backend/backend';
+
+/**
+ * Get a setting value by key. Returns null if not found.
+ */
+export async function getSetting(key: string): Promise<string | null> {
+  return getBackend().getSetting(key);
+}
+
+/**
+ * Set a setting value by key.
+ */
+export async function setSetting(key: string, value: string): Promise<void> {
+  return getBackend().setSetting(key, value);
+}
+
+/**
+ * Get all settings as a key-value map.
+ * Note: returns Record<string, string> (SettingsMap), not [string, string][].
+ * Callers that used listSettings() should adapt to the map format.
+ */
+export async function getAllSettings(): Promise<Record<string, string>> {
+  return getBackend().getAllSettings();
+}
+
+// Re-export for backward compat with code that imported listSettings
+export { getAllSettings as listSettings };

src/lib/stores/theme.svelte.ts

@@ -1,6 +1,6 @@
 // Theme store — persists theme selection via settings bridge
 
-import { getSetting, setSetting } from '../adapters/settings-bridge';
+import { getSetting, setSetting } from './settings-store.svelte';
 import { handleInfraError } from '../utils/handle-error';
 import {
   type ThemeId,

src/lib/styles/custom-themes.ts

@@ -1,6 +1,6 @@
 // Custom theme persistence — store, load, validate, import/export
 
-import { getSetting, setSetting } from '../adapters/settings-bridge';
+import { getSetting, setSetting } from '../stores/settings-store.svelte';
 import { handleError, handleInfraError } from '../utils/handle-error';
 import { type ThemePalette, type ThemeId, getPalette, PALETTE_KEYS } from './themes';