fix(test): re-sync the shared snapshots fixture after the main merge

CI's fixture-sync job requires app/test/fixtures/snapshots.json and
server/test/fixtures/snapshots.json to be byte-identical. The main merge resolved
the two copies differently: I resolved the server one semantically (main's
rewritten ports.snapshot plus our docs.snapshot frame), while the app copy took
main's side and lost the docs frame.

Frames 1-3 were already identical, so the app copy did carry main's updated
ports.snapshot — only our docs.snapshot was missing. Copied server -> app.

Caught by CI, not by either local suite: the server tests read the server copy
and the app's codec_contract_test read the app copy, so each was internally
consistent and neither noticed the divergence. That asymmetry is exactly what the
fixture-sync job exists to catch.

app/test/codec_contract_test.dart 12/12, server 1414/1414.

Author: leduckhc

app/test/fixtures/snapshots.json

@@ -1,5 +1,48 @@
 [
   { "v": 1, "t": "event", "id": "snap1", "kind": "projects.snapshot", "projects": [ { "id": "p1", "name": "makit", "path": "/repo/makit", "pinned": true, "lastActivityAt": 1000 } ] },
   { "v": 1, "t": "event", "id": "snap2", "kind": "sessions.snapshot", "sessions": [ { "id": "s1", "projectId": "p1", "agent": "pi", "title": "work", "status": "running", "policy": "ask-on-risky", "lastActivityAt": 2000, "lastPreview": "hi" } ] },
-  { "v": 1, "t": "event", "id": "snap3", "kind": "ports.snapshot", "snapshot": { "ports": [ { "key": "48211:127.0.0.1:5173", "port": 5173, "address": "127.0.0.1", "reach": "loopback", "pid": 48211, "command": "node vite --port 5173", "startedAt": 1000, "worktreePath": "/repo/makit-wt", "sessionId": "s1", "health": { "kind": "ok", "status": 200, "probedAt": 2000 }, "openUrl": "http://127.0.0.1:5173" }, { "key": "51002:127.0.0.1:5180", "port": 5180, "address": "127.0.0.1", "reach": "loopback", "pid": 51002, "command": "node vite --port 5180", "startedAt": 900, "orphan": { "formerBranch": "feat/desktop-tabs", "formerWorktreePath": "/repo/makit-gone", "removedAt": 2500 } }, { "key": "48300:127.0.0.1:5174", "port": 5174, "address": "127.0.0.1", "reach": "loopback", "pid": 48300, "command": "node vite --port 5174", "startedAt": 950, "worktreePath": "/repo/makit-wt", "collision": { "withBranch": "chore/deps", "withWorktreePath": "/repo/makit-deps" } }, { "key": "901:0.0.0.0:5432", "port": 5432, "address": "0.0.0.0", "reach": "exposed", "pid": 901, "command": "com.docker.backend", "startedAt": 800, "docker": { "container": "chat-ui-db-1", "compose": "/repo/chat-ui/compose.yml" } } ], "scannedAt": 3000, "scanOk": true } }
+  { "v": 1, "t": "event", "id": "snap3", "kind": "ports.snapshot", "snapshot": { "ports": [ { "key": "48211:127.0.0.1:5173", "port": 5173, "address": "127.0.0.1", "reach": "loopback", "pid": 48211, "command": "node vite --port 5173", "startedAt": 1000, "worktreePath": "/repo/makit-wt", "sessionId": "s1", "health": { "kind": "ok", "status": 200, "probedAt": 2000 }, "openUrl": "http://127.0.0.1:5173" }, { "key": "51002:127.0.0.1:5180", "port": 5180, "address": "127.0.0.1", "reach": "loopback", "pid": 51002, "command": "node vite --port 5180", "startedAt": 900, "orphan": { "formerBranch": "feat/desktop-tabs", "formerWorktreePath": "/repo/makit-gone", "removedAt": 2500 } }, { "key": "48300:127.0.0.1:5174", "port": 5174, "address": "127.0.0.1", "reach": "loopback", "pid": 48300, "command": "node vite --port 5174", "startedAt": 950, "worktreePath": "/repo/makit-wt", "collision": { "withBranch": "chore/deps", "withWorktreePath": "/repo/makit-deps" } }, { "key": "901:0.0.0.0:5432", "port": 5432, "address": "0.0.0.0", "reach": "exposed", "pid": 901, "command": "com.docker.backend", "startedAt": 800, "docker": { "container": "chat-ui-db-1", "compose": "/repo/chat-ui/compose.yml" } } ], "scannedAt": 3000, "scanOk": true } },
+{
+    "v": 1,
+    "t": "event",
+    "id": "snap4",
+    "kind": "docs.snapshot",
+    "snapshot": {
+      "docs": [
+        {
+          "key": "/repo/makit-wt:mockups/open-ports.html",
+          "relPath": "mockups/open-ports.html",
+          "title": "makit — Ports: what's listening, and whose branch owns it",
+          "kind": "html",
+          "bytes": 106538,
+          "modifiedAt": 2000,
+          "worktreePath": "/repo/makit-wt",
+          "sessionId": "s1",
+          "changed": true
+        },
+        {
+          "key": "/repo/makit-wt:docs/specs/2026-08-07-SPEC-44-ports-forward.md",
+          "relPath": "docs/specs/2026-08-07-SPEC-44-ports-forward.md",
+          "title": "SPEC-44 — Ports P4: forward a loopback port to the phone",
+          "kind": "md",
+          "bytes": 18422,
+          "modifiedAt": 1500,
+          "worktreePath": "/repo/makit-wt",
+          "docStatus": "Draft",
+          "changed": false
+        },
+        {
+          "key": "/repo/makit-main:README.md",
+          "relPath": "README.md",
+          "title": "Makit",
+          "kind": "md",
+          "bytes": 4096,
+          "modifiedAt": 900,
+          "worktreePath": "/repo/makit-main"
+        }
+      ],
+      "scannedAt": 2100,
+      "scanOk": true
+    }
+  }
 ]