fix: default enabled to true — installing the plugin should activate it

Previously defaulted to false, requiring users to explicitly set
enabled: true in magic-context.jsonc. The config-parse failure
fallback correctly stays enabled: false.

Author: ualtinok

packages/plugin/src/config/schema/magic-context.test.ts

@@ -15,7 +15,7 @@ describe("MagicContextConfigSchema", () => {
             const result = MagicContextConfigSchema.parse({});
 
             expect(result).toMatchObject({
-                enabled: false,
+                enabled: true,
                 cache_ttl: "5m",
                 nudge_interval_tokens: DEFAULT_NUDGE_INTERVAL_TOKENS,
                 execute_threshold_percentage: 65,

packages/plugin/src/config/schema/magic-context.ts

@@ -136,8 +136,8 @@ export interface MagicContextConfig {
 
 export const MagicContextConfigSchema = z
     .object({
-        /** Enable magic context (default: false) */
-        enabled: z.boolean().default(false),
+        /** Enable magic context (default: true) */
+        enabled: z.boolean().default(true),
         /** When false, ctx_reduce tool is hidden, all nudges disabled, and prompt
          *  guidance about ctx_reduce stripped. Heuristic cleanup, compartments,
          *  memory, and other features still work. (default: true) */