fix: improve LinkedIn API posting and authenticationv1.2.4

- Add token validation before using cached credentials to prevent stale token issues
- Add proper error handling for image upload initialization with helpful 426 messages
- Skip data URI images instead of attempting to download them
- Update default LinkedIn API version to 202601 (January 2026) - latest active version
- Fix re-authentication flow for expired tokens

Amp-Thread-ID: https://ampcode.com/threads/T-019c6d28-4526-7738-b593-9bd584baa478
Co-authored-by: Amp <amp@ampcode.com>

1 files changed, 26 insertions, 0 deletions

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+# Plan
+
+- Add a new flag `--stats` which would only print out the stats for all social networks, but do nothing else.
+
+## Implementation Outline for `--stats` flag: (ALL DONE)
+
+1.  **Modify `internal/main.go`**: (DONE)
+    *   **Define the `--stats` flag**: Add `statsOnly := flag.Bool("stats", false, "Print statistics for all social networks and exit")` near other flag definitions.
+    *   **Populate `config.Args`**: Assign `*statsOnly` to `args.StatsOnly` after `flag.Parse()`.
+    *   **Conditional logic**: After `flag.Parse()` and before calling `run(ctx, args)`, add a check:
+        ```go
+        if args.StatsOnly {
+            // Call the new function to print all stats
+            schedule.PrintAllStats(args)
+            return // Exit after printing stats
+        }
+        ```
+
+2.  **Modify `internal/config/args.go`**: (DONE)
+    *   Add `StatsOnly bool` to the `Args` struct.
+
+3.  **Modify `internal/schedule/stats.go`**: (DONE)
+    *   **Create a new public function `PrintAllStats(args config.Args)`**:
+        *   This function will iterate through `args.Platforms`.
+        *   For each platform, it will call `newStats` to gather the statistics.
+        *   Then, it will call `stats.RenderTable` to display the statistics for that platform.
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