build: one workspace for every app and the packages they share

The root pubspec lists Learn's, Todo's and the shared packages, which
the apps now take by path instead of pinned commits of halkyon_shared:
one resolution, one lockfile. Learn's versions stay as they were; Todo
moves to Serverpod 4.0.4 and Dart 3.13 with the rest (its generated code
unchanged), drops google_fonts, which it never used, and a template
line Dart 3.13 refuses.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/learn/halkyon_learn_client/pubspec.yaml

@@ -9,10 +9,7 @@ resolution: workspace
 dependencies:
   # The client side of halkyon_base (ADR 0014), as the server's.
   halkyon_base_client:
-    git:
-      url: https://code.halkyon.app/project-halkyon/halkyon_shared.git
-      path: packages/halkyon_base_client
-      ref: 96f2d1461803599bdf5b14783f4b3d3a2810742f
+    path: ../../../packages/halkyon_base_client
   serverpod_auth_idp_client: 4.0.4
   serverpod_client: 4.0.4
   serverpod_offline_sync_client: 0.0.10

apps/learn/halkyon_learn_curator/analysis_options.yaml

@@ -1,2 +1,2 @@
 # The workspace's lint rules (see ../analysis_options.yaml).
-include: ../analysis_options.yaml
+include: ../../../analysis_options.yaml

apps/learn/halkyon_learn_flutter/analysis_options.yaml

@@ -2,7 +2,7 @@
 #
 # If this app ever leaves the pub workspace, it has to enable the analyzer plugin itself:
 # include package:leancode_lint/analysis_options.yaml and add the `plugins:` section here.
-include: ../analysis_options.yaml
+include: ../../../analysis_options.yaml
 
 analyzer:
   exclude:

apps/learn/halkyon_learn_flutter/pubspec.yaml

@@ -66,33 +66,21 @@ dependencies:
   # schedules.
   fsrs: 2.0.1
   go_router: ^18.0.2
-  # What every Halkyon app is built around (halkyon_shared): the instances a
+  # What every Halkyon app is built around (a shared package): the instances a
   # device keeps accounts on, signing in through halkyon_base, each person's
-  # data opened and closed, and syncing it, with texts of its own. As
-  # halkyon_ui, pinned to a signed commit of halkyon_shared's main.
+  # data opened and closed, and syncing it, with texts of its own.
   halkyon_app:
-    git:
-      url: https://code.halkyon.app/project-halkyon/halkyon_shared.git
-      path: packages/halkyon_app
-      ref: 96f2d1461803599bdf5b14783f4b3d3a2810742f
-  # Halkyon's low-level parts (halkyon_shared): the queues the repositories
+    path: ../../../packages/halkyon_app
+  # Halkyon's low-level parts (a shared package): the queues the repositories
   # run their work in (SerialQueue, CoalescingRunner).
   halkyon_core:
-    git:
-      url: https://code.halkyon.app/project-halkyon/halkyon_shared.git
-      path: packages/halkyon_core
-      ref: 96f2d1461803599bdf5b14783f4b3d3a2810742f
+    path: ../../../packages/halkyon_core
   halkyon_learn_client:
     path: ../halkyon_learn_client
-  # Halkyon's look, shared by its apps (halkyon_shared): the theme, the bundled Noto
-  # Sans, window sizes and the widgets every screen is built of. Pinned to a signed
-  # commit of halkyon_shared's main; for local work on both, a git-ignored
-  # pubspec_overrides.yaml at the workspace root points it at a checkout.
+  # Halkyon's look, shared by its apps (a shared package): the theme, the bundled
+  # Noto Sans, window sizes and the widgets every screen is built of.
   halkyon_ui:
-    git:
-      url: https://code.halkyon.app/project-halkyon/halkyon_shared.git
-      path: packages/halkyon_ui
-      ref: 96f2d1461803599bdf5b14783f4b3d3a2810742f
+    path: ../../../packages/halkyon_ui
   # Anki's fields are HTML; the editor brings this parser along already.
   html: ^0.15.6
   # Talks to Jellyfin servers; Serverpod's client brings it along already.

apps/learn/halkyon_learn_server/analysis_options.yaml

@@ -1,5 +1,5 @@
 # The workspace's lint rules (see ../analysis_options.yaml), minus generated code.
-include: ../analysis_options.yaml
+include: ../../../analysis_options.yaml
 
 analyzer:
   exclude:

apps/learn/halkyon_learn_server/pubspec.yaml

@@ -12,15 +12,10 @@ dependencies:
   clock: ^1.1.3
   crypto: ^3.0.7
   # What every Halkyon server has (ADR 0014): signing in, the account and its
-  # deletion, pruning, the instance's basics. A Serverpod module in
-  # halkyon_shared, pinned to a signed commit of its main; for local work on
-  # both, a git-ignored pubspec_overrides.yaml at the workspace root points it
-  # at a checkout.
+  # deletion, pruning, the instance's basics. A Serverpod module among the
+  # repository's shared packages.
   halkyon_base_server:
-    git:
-      url: https://code.halkyon.app/project-halkyon/halkyon_shared.git
-      path: packages/halkyon_base_server
-      ref: 96f2d1461803599bdf5b14783f4b3d3a2810742f
+    path: ../../../packages/halkyon_base_server
   # Reads the pages profile links point to, for their rel="me" back-links.
   html: ^0.15.6
   # Mails email sign-in's codes over SMTP (ADR 0010).