add server settings UI and enforcement

packages/shim/src/fs/content-cache.js

@@ -10,6 +10,14 @@ export class ContentCache {
     this._maxSize = maxSize;
   }
 
+  setMaxSize(maxSize) {
+    this._maxSize = maxSize;
+
+    while (this._currentSize > this._maxSize && this._cache.size > 0) {
+      this._evictOne();
+    }
+  }
+
   has(path) {
     return this._cache.has(this._normalize(path));
   }

packages/shim/src/fs/input-cache.js

@@ -7,8 +7,8 @@
 
 import { normalize } from "../util/path.js";
 
-const MAX_SIZE = 200 * 1024 * 1024;
-const TTL_MS = 5 * 60 * 1000;
+let MAX_SIZE = 200 * 1024 * 1024;
+let TTL_MS = 5 * 60 * 1000;
 
 const cache = new Map(); // path -> { data, size, createdAt }
 let currentSize = 0;
@@ -112,6 +112,20 @@ export function inputCacheClear() {
   currentSize = 0;
 }
 
+export function setInputCacheLimits({ maxSize, ttlMs }) {
+  if (Number.isFinite(maxSize)) {
+    MAX_SIZE = maxSize;
+
+    while (currentSize > MAX_SIZE && cache.size > 0) {
+      evictOldest();
+    }
+  }
+
+  if (Number.isFinite(ttlMs)) {
+    TTL_MS = ttlMs;
+  }
+}
+
 export function isInputCachePath(path) {
   const norm = normalize(path);
   return norm.startsWith(".obsidian/imports/");

packages/shim/src/init.js

@@ -8,11 +8,26 @@ import {
   initWorkspacePatch,
 } from "./workspace.js";
 import { prefetchVaultContent } from "./fs/indexer-prefetch.js";
+import { setInputCacheLimits } from "./fs/input-cache.js";
 import { autoTrustDemoVaults, maybeProvisionDemoVault } from "./demo.js";
 import { initNativeMenuGuard } from "./native-menu-guard.js";
 
 let bootstrapVirtualPlugins = [];
 
+// Cache sizes come from the bootstrap response and are applied at page load.
+// The server owns the rest of the settings and applies them on its side.
+function applyServerSettings(s) {
+  if (!s) {
+    return;
+  }
+
+  if (Number.isFinite(s.contentCacheBytes)) {
+    fsShim._contentCache.setMaxSize(s.contentCacheBytes);
+  }
+
+  setInputCacheLimits({ maxSize: s.inputCacheBytes, ttlMs: s.inputCacheTtlMs });
+}
+
 export function getBootstrapVirtualPlugins() {
   return bootstrapVirtualPlugins;
 }
@@ -212,6 +227,7 @@ export function initialize() {
     applyTree(bootstrap.tree);
     applyCoreSyncGuard(bootstrap.plugins);
     bootstrapVirtualPlugins = bootstrap.virtualPlugins || [];
+    applyServerSettings(bootstrap.settings);
 
     // Race the indexer: batch-fetch text content into ContentCache so
     // Obsidian's startup indexing reads hit the cache instead of the network.