Merge origin/main into claude/hermes-context-loss-fayw61 (2.5.4)

Keeps main's neutral default instructions (assistant name now comes from the
settings) together with the new guidance on long replies and continuity;
bumps to 2.5.4 since main already published 2.5.3.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ln4KL1feHtnV4nee4sZFhM

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "eveflow",
-  "version": "2.5.2",
+  "version": "2.5.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "eveflow",
-      "version": "2.5.2",
+      "version": "2.5.4",
       "license": "MIT",
       "dependencies": {
         "@fontsource/orbitron": "^5.3.0",