chore: prepare Desktop 0.12.12 release

Bump the desktop patch version and package matching Chinese and English notes
for image follow-up context, retained questions and answers, simpler Runtime
selection, and docked Git history with automatic project detection.

Review and align both feature matrices with the verified release range.
Agent stays at 0.11.23; no Agent release or LoongArch preview is included.
External knowledge probe tooling remains development-only, not a shipped
external knowledge-base feature.

Validation: 3911 tests passed, 66 skipped; typecheck, lint, and bilingual
release-note verification passed. Production builds use main-branch CI before
the immutable desktop tag; no local production package was built.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "goodbuddy",
-  "version": "0.12.11",
+  "version": "0.12.12",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "goodbuddy",
-      "version": "0.12.11",
+      "version": "0.12.12",
       "license": "0BSD",
       "dependencies": {
         "@agentclientprotocol/sdk": "0.25.1",