fix(seo): dedupe " | Kestra" title suffix (resources template)

[vfanucci]

Item 2 of #5077 — <title> suffix has two owners

The layout unconditionally appended | Kestra to every metaTitle, producing | Kestra | Kestra on pages whose front-matter already carries the suffix (house convention in the /resources/ content pipeline). Side effect: twitter:image:alt / og:image:alt inherited the doubled title.

Fix

Strip any existing | Kestra suffix before re-appending, so the template is the single owner of the suffix (the issue's recommendation). Robust: works whether or not front-matter includes the suffix — no content migration required to stop the duplication today.

src/components/layout.astro — one-block change.

Acceptance

• Exactly one | Kestra on every page. ✅
• <title> length is now driven solely by the front-matter metaTitle (content pipeline still enforces its own ≤51-char budget).

Part of the 4-PR set for #5077 (order: 2 → 4 → 1+3).

🤖 Generated with Claude Code

[github-actions]

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## 🔦 Lighthouse Benchmark

Tested: http://localhost:8787 on 2026-07-17 07:24 UTC
Compared against main baseline from 2026-07-16

Scores (0–100, higher is better)

Page	Performance	Accessibility	Best Practices	SEO
Home	59 🔻 -29	84	54	92
Pricing	97	92	54	100
Enterprise	95	83	54	100
Cloud	90	88	54	100
About Us	99 🟢 +15	91	54	100
Docs Landing	93	88	54	92
Contribute to Kestra (simple docs)	97	88	54	92
Flow (full featured docs)	93	90	54	92
Blog Index	75	91	54	100
Blog Post (sample)	89	88	54	100
VS Page (sample)	97	88	54	100
Plugins Landing	93	81	54	92
Plugin Page (sample)	96	88	54	100
Plugin Debug Page (sample)	0 🔻 -95	88	54	100
Plugin Debug Return Page (sample)	93	88	54	100
Blueprints Landing	90	80	54 🔻 -19	92
Blueprint Audit Logs CSV Export	66	92	54	100

Core Web Vitals (lower is better)

Page	LCP	FCP	TBT	CLS	Speed Index
Home	1.31 s	0.91 s	1227 ms 🔻	0.002	3.10 s 🔻
Pricing	1.24 s	0.53 s	44 ms	0.000	0.71 s
Enterprise	1.47 s	0.58 s	27 ms	0.000 🟢	0.74 s
Cloud	2.01 s	0.56 s	46 ms	0.000	0.88 s
About Us	0.97 s 🟢	0.64 s	21 ms	0.000	0.77 s
Docs Landing	1.56 s	0.54 s	114 ms	0.000	0.90 s
Contribute to Kestra (simple docs)	1.20 s	0.50 s	65 ms	0.000 🟢	0.75 s
Flow (full featured docs)	1.38 s	0.58 s	129 ms	0.000	1.14 s
Blog Index	8.84 s	0.57 s	29 ms 🟢	0.000	0.84 s
Blog Post (sample)	2.18 s 🔻	0.56 s	27 ms	0.000	0.74 s
VS Page (sample)	1.06 s	0.60 s	54 ms 🔻	0.064	0.70 s
Plugins Landing	1.03 s	0.57 s	80 ms	0.000	2.20 s
Plugin Page (sample)	0.99 s	0.51 s	32 ms	0.051	1.66 s
Plugin Debug Page (sample)	0.00 s 🟢	0.00 s 🟢	0 ms 🟢	0.000 🟢	0.00 s 🟢
Plugin Debug Return Page (sample)	1.12 s	0.61 s	137 ms 🔻	0.025	1.81 s
Blueprints Landing	1.60 s 🔻	0.83 s 🔻	56 ms 🟢	0.000	1.94 s
Blueprint Audit Logs CSV Export	1.00 s	0.65 s	223 ms	0.483	2.04 s

Legend

🟢 improved  ·  🔻 regressed  ·  (blank) no significant change
Score threshold: ±10 pts  ·  Metric threshold: ±30% of baseline