feat: Phase 1 — extract the client (web SPA + desktop) to dtoro/oikos-web

Problem: the hexagonal refactor churns the backend tree for nine more
phases; the UI delivery stack (web/ SPA, cmd/desktop Wails wrapper,
compose/web image) must move to its own repo first so doc/layout
rewrites land once on a backend-only tree.

Change:
- New repo git.hubris.network/dtoro/oikos-web (v0.33.0): web/, desktop/
  (updateURL repointed to oikos-web releases), compose/, own CI (web +
  desktop jobs), own deploy script (CI-green gate, TOCTOU guard,
  version-tagged images, prune-to-3), own webhook receiver on :9798 +
  launchd unit, own compose project publishing the same 8091:80.
- Cutover executed on mac-mini in order: oikos stack's web service
  stopped+removed, oikos-web project brought up on 8091; outer Caddy
  untouched (targets the published port) — serving + Authentik flow +
  /wails 404 quirk verified post-cutover.
- Stripped from oikos: web/, cmd/desktop/, compose/web/, desktop CI
  workflow, ci.yml web job, Makefile ui/desktop/desktop-package/install
  targets, the compose web service, oikos-web from deploy.sh's fallback
  prune list; wails + go-keyring dropped from go.mod, vendor synced.
- README / CONTRIBUTING / AGENTS.md / .agents dev+operations docs now
  point at the new repo; mbse + mascot design docs carry a path note.

Risk: production SPA serving depends on the new pipeline now; rollback
is versioned-image re-up of the old web service from a pre-split
checkout (port 8091). Desktop builds installed before the split still
check dtoro/oikos releases — one manual reinstall, noted in the
oikos-web release notes.

Verification: go vet, make test (race), make generate-check, golangci
(no new findings; baseline down 400→365); post-cutover curls —
localhost:8091 200, /wails/runtime.js 404, outer Caddy 302 Authentik.

web/node_modules/vite/bin/openChrome.applescript

@@ -0,0 +1,95 @@
+(*
+Copyright (c) 2015-present, Facebook, Inc.
+
+This source code is licensed under the MIT license found in the
+LICENSE file at
+https://github.com/facebookincubator/create-react-app/blob/master/LICENSE
+*)
+
+property targetTab: null
+property targetTabIndex: -1
+property targetWindow: null
+property theProgram: "Google Chrome"
+
+on run argv
+  set theURL to item 1 of argv
+
+  -- Allow requested program to be optional,
+  -- default to Google Chrome
+  if (count of argv) > 1 then
+    set theProgram to item 2 of argv
+  end if
+
+  using terms from application "Google Chrome"
+    tell application theProgram
+
+      if (count every window) = 0 then
+        make new window
+      end if
+
+      -- 1: Looking for tab running debugger
+      -- then, Reload debugging tab if found
+      -- then return
+      set found to my lookupTabWithUrl(theURL)
+      if found then
+        set targetWindow's active tab index to targetTabIndex
+        tell targetTab to reload
+        tell targetWindow to activate
+        set index of targetWindow to 1
+        return
+      end if
+
+      -- 2: Looking for Empty tab
+      -- In case debugging tab was not found
+      -- We try to find an empty tab instead
+      set found to my lookupTabWithUrl("chrome://newtab/")
+      if found then
+        set targetWindow's active tab index to targetTabIndex
+        set URL of targetTab to theURL
+        tell targetWindow to activate
+        return
+      end if
+
+      -- 3: Create new tab
+      -- both debugging and empty tab were not found
+      -- make a new tab with url
+      tell window 1
+        activate
+        make new tab with properties {URL:theURL}
+      end tell
+    end tell
+  end using terms from
+end run
+
+-- Function:
+-- Lookup tab with given url
+-- if found, store tab, index, and window in properties
+-- (properties were declared on top of file)
+on lookupTabWithUrl(lookupUrl)
+  using terms from application "Google Chrome"
+    tell application theProgram
+      -- Find a tab with the given url
+      set found to false
+      set theTabIndex to -1
+      repeat with theWindow in every window
+        set theTabIndex to 0
+        repeat with theTab in every tab of theWindow
+          set theTabIndex to theTabIndex + 1
+          if (theTab's URL as string) contains lookupUrl then
+            -- assign tab, tab index, and window to properties
+            set targetTab to theTab
+            set targetTabIndex to theTabIndex
+            set targetWindow to theWindow
+            set found to true
+            exit repeat
+          end if
+        end repeat
+
+        if found then
+          exit repeat
+        end if
+      end repeat
+    end tell
+  end using terms from
+  return found
+end lookupTabWithUrl