CI hardening: strict builds, conda dependabot, missing figure (succeeds #97) (#166)

* CI hardening: strict builds, conda dependabot, missing wald_dec_rule.png

Carries forward the pieces of #97 that #165 did not supersede:

- jb build gains '-n -W --keep-going' in cache/ci/publish workflows,
  matching the English source repos' strict-build convention
- dependabot watches the conda ecosystem (jupyter-book pinned <2.0,
  python constrained by the anaconda distribution)
- wald_dec_rule.png copied from the source repo (referenced by
  wald_friedman_2 but absent here - a warning today, an error under -W)

Dropped from #97 as obsolete: the lecture-code fixes (regenerated by the
Track B resync wave or applied directly to its branches) and the ogm.py
tweak (optgrowth_fast was removed in #99).

Part of Phase 0 Track B, QuantEcon/lecture-python.myst#947.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Fix the two main-content strict-build breaks: mix_model import, cass_fiscal ref

mix_model kept a CJK font-config block without the mpl import it needs
(same class as the five wave-branch fixes; mix_model was skipped by the
wave so the pre-existing bug stayed on main). cass_fiscal's note pointed
{doc} at a document that never existed; replaced with the wave branch's
exact {ref}`growth_model` sentence so the resync PR merges cleanly over
it. newton_method's two iref_ambiguous warnings are NOT patched here:
old main lacks the local anchors, and the resync PR (#140) adds them -
merging #140 resolves those warnings without conflict-prone edits.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: mmcky

.github/dependabot.yml

@@ -11,3 +11,16 @@ updates:
       prefix: ⬆️
     schedule:
       interval: weekly
+
+  - package-ecosystem: "conda"
+    directory: "/"
+    commit-message:
+      prefix: ⬆️
+    schedule:
+      interval: weekly
+    ignore:
+      - dependency-name: "jupyter-book"
+        versions: [">=2.0"]
+      - dependency-name: "python"
+        # Python version should be constrained by the anaconda distribution version
+        versions: [">0"]

.github/workflows/cache.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Build HTML
         shell: bash -l {0}
         run: |
-          jb build lectures --path-output ./ --keep-going
+          jb build lectures --path-output ./ -n -W --keep-going
       - name: Upload Execution Reports (HTML)
         uses: actions/upload-artifact@v4
         if: failure()

.github/workflows/ci.yml

@@ -73,7 +73,7 @@ jobs:
       - name: Build HTML
         shell: bash -l {0}
         run: |
-          jb build lectures --path-output ./ --keep-going
+          jb build lectures --path-output ./ -n -W --keep-going
       - name: Upload Execution Reports (HTML)
         uses: actions/upload-artifact@v4
         if: failure()

.github/workflows/publish.yml

@@ -73,7 +73,7 @@ jobs:
       - name: Build HTML
         shell: bash -l {0}
         run: |
-          jb build lectures --path-output ./
+          jb build lectures --path-output ./ -n -W --keep-going
       # Create HTML archive for release assets
       - name: Create HTML archive
         shell: bash -l {0}

lectures/_static/lecture_specific/wald_friedman_2/wald_dec_rule.png

@@ -287,7 +287,7 @@ mp.pretty = True
 我们使用`mpmath`库在射击算法中执行高精度运算，以防止由于数值不稳定而导致解发散。
 
 ```{note}
-在下面的函数中，我们包含了一些处理增长成分的例程（将在{doc}`Exogenous growth` 一节中进一步讨论）。
+在下面的函数中，我们包含了一些处理增长成分的例程，这部分内容将在{ref}`growth_model`一节中进一步讨论。
 
 我们在这里提前加入这些代码是为了避免代码重复。
 ```

lectures/cass_fiscal.md

@@ -117,6 +117,7 @@ $$
 
 import matplotlib.pyplot as plt
 FONTPATH = "fonts/SourceHanSerifSC-SemiBold.otf"
+import matplotlib as mpl
 mpl.font_manager.fontManager.addfont(FONTPATH)
 plt.rcParams['font.family'] = ['Source Han Serif SC']