content(gallery): real City & Farm photos; drop placeholders for populated folders

Replaces the City placeholder SVGs with 5 real photos and adds a Farm
photo (dropped in via the auto-populate workflow). Festival + remaining
Farm placeholders stay until real shots land.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/deck/gallery/city/01-placeholder.svg

@@ -1,15 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 1040" width="800" height="1040" font-family="Georgia, serif">
-  <defs>
-    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
-      <stop offset="0" stop-color="hsl(160 60% 40%)" stop-opacity="0.40"/>
-      <stop offset="1" stop-color="hsl(160 28% 6%)" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
-  <rect width="800" height="1040" fill="hsl(160 28% 6%)"/>
-  <rect width="800" height="1040" fill="url(#g)"/>
-  <circle cx="740" cy="60" r="120" fill="hsl(160 60% 40%)" opacity="0.12"/>
-  <circle cx="70" cy="970" r="90" fill="hsl(160 60% 40%)" opacity="0.10"/>
-  <text x="400" y="480" text-anchor="middle" fill="hsl(160 60% 40%)" font-size="46" font-weight="bold">City</text>
-  <text x="400" y="526" text-anchor="middle" fill="hsl(44 30% 90%)" font-size="26" opacity="0.85">Photo 01</text>
-  <text x="400" y="564" text-anchor="middle" fill="hsl(150 8% 62%)" font-size="18" letter-spacing="3">PLACEHOLDER · 800×1040</text>
-</svg>

src/deck/gallery/city/02-placeholder.svg

@@ -1,15 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 620" width="800" height="620" font-family="Georgia, serif">
-  <defs>
-    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
-      <stop offset="0" stop-color="hsl(160 60% 40%)" stop-opacity="0.40"/>
-      <stop offset="1" stop-color="hsl(160 28% 6%)" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
-  <rect width="800" height="620" fill="hsl(160 28% 6%)"/>
-  <rect width="800" height="620" fill="url(#g)"/>
-  <circle cx="740" cy="60" r="120" fill="hsl(160 60% 40%)" opacity="0.12"/>
-  <circle cx="70" cy="550" r="90" fill="hsl(160 60% 40%)" opacity="0.10"/>
-  <text x="400" y="270" text-anchor="middle" fill="hsl(160 60% 40%)" font-size="46" font-weight="bold">City</text>
-  <text x="400" y="316" text-anchor="middle" fill="hsl(44 30% 90%)" font-size="26" opacity="0.85">Photo 02</text>
-  <text x="400" y="354" text-anchor="middle" fill="hsl(150 8% 62%)" font-size="18" letter-spacing="3">PLACEHOLDER · 800×620</text>
-</svg>

src/deck/gallery/city/03-placeholder.svg

@@ -1,15 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 800" width="800" height="800" font-family="Georgia, serif">
-  <defs>
-    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
-      <stop offset="0" stop-color="hsl(160 60% 40%)" stop-opacity="0.40"/>
-      <stop offset="1" stop-color="hsl(160 28% 6%)" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
-  <rect width="800" height="800" fill="hsl(160 28% 6%)"/>
-  <rect width="800" height="800" fill="url(#g)"/>
-  <circle cx="740" cy="60" r="120" fill="hsl(160 60% 40%)" opacity="0.12"/>
-  <circle cx="70" cy="730" r="90" fill="hsl(160 60% 40%)" opacity="0.10"/>
-  <text x="400" y="360" text-anchor="middle" fill="hsl(160 60% 40%)" font-size="46" font-weight="bold">City</text>
-  <text x="400" y="406" text-anchor="middle" fill="hsl(44 30% 90%)" font-size="26" opacity="0.85">Photo 03</text>
-  <text x="400" y="444" text-anchor="middle" fill="hsl(150 8% 62%)" font-size="18" letter-spacing="3">PLACEHOLDER · 800×800</text>
-</svg>

src/deck/gallery/city/04-placeholder.svg

@@ -1,15 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 560" width="800" height="560" font-family="Georgia, serif">
-  <defs>
-    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
-      <stop offset="0" stop-color="hsl(160 60% 40%)" stop-opacity="0.40"/>
-      <stop offset="1" stop-color="hsl(160 28% 6%)" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
-  <rect width="800" height="560" fill="hsl(160 28% 6%)"/>
-  <rect width="800" height="560" fill="url(#g)"/>
-  <circle cx="740" cy="60" r="120" fill="hsl(160 60% 40%)" opacity="0.12"/>
-  <circle cx="70" cy="490" r="90" fill="hsl(160 60% 40%)" opacity="0.10"/>
-  <text x="400" y="240" text-anchor="middle" fill="hsl(160 60% 40%)" font-size="46" font-weight="bold">City</text>
-  <text x="400" y="286" text-anchor="middle" fill="hsl(44 30% 90%)" font-size="26" opacity="0.85">Photo 04</text>
-  <text x="400" y="324" text-anchor="middle" fill="hsl(150 8% 62%)" font-size="18" letter-spacing="3">PLACEHOLDER · 800×560</text>
-</svg>

src/deck/gallery/city/05-placeholder.svg

@@ -1,15 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 900" width="800" height="900" font-family="Georgia, serif">
-  <defs>
-    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
-      <stop offset="0" stop-color="hsl(160 60% 40%)" stop-opacity="0.40"/>
-      <stop offset="1" stop-color="hsl(160 28% 6%)" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
-  <rect width="800" height="900" fill="hsl(160 28% 6%)"/>
-  <rect width="800" height="900" fill="url(#g)"/>
-  <circle cx="740" cy="60" r="120" fill="hsl(160 60% 40%)" opacity="0.12"/>
-  <circle cx="70" cy="830" r="90" fill="hsl(160 60% 40%)" opacity="0.10"/>
-  <text x="400" y="410" text-anchor="middle" fill="hsl(160 60% 40%)" font-size="46" font-weight="bold">City</text>
-  <text x="400" y="456" text-anchor="middle" fill="hsl(44 30% 90%)" font-size="26" opacity="0.85">Photo 05</text>
-  <text x="400" y="494" text-anchor="middle" fill="hsl(150 8% 62%)" font-size="18" letter-spacing="3">PLACEHOLDER · 800×900</text>
-</svg>