Replace image pipeline with profile-driven variants

- add image normalization profiles and thumbnail profiles
- generate source, full-size variant, and thumbnail image artifacts
- rewrite canonical image URLs through the first configured profile
- emit explicit image Media RSS groups with named thumbnails
- preserve legacy image paths when image conversion is disabled
- cover cache-hit source paths, inline image handling, and thumbnail export

repub/settings.py

@@ -100,6 +100,116 @@ LOG_LEVEL = "INFO"
 
 MEDIA_ALLOW_REDIRECTS = True
 
+REPUBLISHER_IMAGE_NORMALIZE_ENABLED = True
+REPUBLISHER_IMAGE_THUMBNAILS_ENABLED = True
+
+REPUBLISHER_IMAGE_DIR = "images"
+REPUBLISHER_IMAGE_FULL_SUBDIR = "full"
+REPUBLISHER_IMAGE_SOURCE_SUBDIR = "source"
+REPUBLISHER_IMAGE_THUMBNAIL_SUBDIR = "thumbs"
+
+REPUBLISHER_IMAGE = [
+    {
+        "name": "main_webp",
+        "mimetype": "image/webp",
+        "extension": "webp",
+        "transform": "thumbnail",
+        "transform_kwargs": {
+            "width": 1600,
+            "height": 1600,
+            "size": "down",
+            "no_rotate": False,
+            "linear": False,
+            "fail_on": "warning",
+        },
+        "save": "webpsave_buffer",
+        "save_kwargs": {
+            "Q": 82,
+            "preset": "photo",
+            "smart_subsample": True,
+            "effort": 4,
+            "alpha_q": 90,
+            "keep": "none",
+        },
+    },
+    {
+        "name": "fallback_jpeg",
+        "mimetype": "image/jpeg",
+        "extension": "jpg",
+        "transform": "thumbnail",
+        "transform_kwargs": {
+            "width": 1600,
+            "height": 1600,
+            "size": "down",
+            "no_rotate": False,
+            "linear": False,
+            "fail_on": "warning",
+        },
+        "save": "jpegsave_buffer",
+        "save_kwargs": {
+            "Q": 85,
+            "interlace": True,
+            "optimize_coding": True,
+            "trellis_quant": True,
+            "optimize_scans": True,
+            "subsample_mode": "auto",
+            "keep": "none",
+            "background": [255, 255, 255],
+        },
+    },
+]
+
+REPUBLISHER_IMAGE_THUMBNAILS = [
+    {
+        "name": "card_hero",
+        "mimetype": "image/jpeg",
+        "extension": "jpg",
+        "transform": "thumbnail",
+        "transform_kwargs": {
+            "width": 640,
+            "height": 360,
+            "size": "down",
+            "crop": "attention",
+            "no_rotate": False,
+            "linear": False,
+            "fail_on": "warning",
+        },
+        "save": "jpegsave_buffer",
+        "save_kwargs": {
+            "Q": 82,
+            "interlace": True,
+            "optimize_coding": True,
+            "subsample_mode": "auto",
+            "keep": "none",
+            "background": [255, 255, 255],
+        },
+    },
+    {
+        "name": "list_square",
+        "mimetype": "image/jpeg",
+        "extension": "jpg",
+        "transform": "thumbnail",
+        "transform_kwargs": {
+            "width": 160,
+            "height": 160,
+            "size": "down",
+            "crop": "centre",
+            "no_rotate": False,
+            "linear": False,
+            "fail_on": "warning",
+        },
+        "save": "jpegsave_buffer",
+        "save_kwargs": {
+            "Q": 78,
+            "interlace": True,
+            "optimize_coding": True,
+            "subsample_mode": "auto",
+            "keep": "none",
+            "background": [255, 255, 255],
+        },
+    },
+]
+
 REPUBLISHER_AUDIO = [
     {
         "name": "mp3_vbr7_voice",